RUS Bulletin 1728F-803

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UNITED STATES DEPARTMENT OF AGRICULTURE

Rural Utilities Service

RUS BULLETIN 1728F-803

SUBJECT: Specifications and Drawings for 24.9/14.4 kV Line

Construction

Incorporated by reference in 7 CFR Part 1728

TO: All RUS Borrowers

RUS Electric Staff

EFFECTIVE DATE: Date of Approval

EXPIRATION DATE: Not applicable. Incorporated by reference in 7

CFR Part 1728

OFFICE OF PRIMARY INTEREST: Distribution Branch, Electric Staff

Division

FILING INSTRUCTIONS: This bulletin is an update and revision of

previous REA Bulletin 50-5 (D-803), (revised September, 1969),

and has been renumbered and renamed as RUS Bulletin 1728F-803,

Specifications and Drawings for 24.9/14.4 kV Line Construction.

Replace previous Bulletin 50-5 with this bulletin and file with

7 CFR Part 1728.

PURPOSE: The specifications and drawings of this bulletin have

been published to set forth requirements, specifications and

standards for the construction of 24.9/14.4 kV overhead electric

distribution lines and associated equipment and construction

assembly units.

GENERAL: Listed below are some of the significant changes and

additions which were made during the update of this bulletin:

(a) The bulletin has been reformatted into 19 separate

sections or categories. Each section generally

contains construction specifications, an index of

drawings, and construction drawings of assemblies

designed to perform a similar function.

(b) New tables have been added to define maximum line

angles and soil classification data. Appendix 2 at the

end of the bulletin documents the formula and data used

to determine the line angles in the tables.

BULLETIN 1728F-803: INDEX

SECTION CATEGORY DESCRIPTIONS

General Construction Specifications

Conductor Installation Specifications

A SINGLE-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

Index A

Construction Specifications for Pole Top Assemblies

Tables I - V: Maximum Line Angles

Single-Phase Primary Pole Top Construction Drawings

B TWO-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

Index B

Two-Phase Primary Pole Top Construction Drawings

C THREE-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

Index C

Three-Phase Primary Pole Top Construction Drawings

D DOUBLE-CIRCUIT PRIMARY POLE TOP ASSEMBLY UNITS

Index D

Double-Circuit Primary Pole Top Construction Drawings

E GUYING ASSEMBLY UNITS

Index E

Construction Specifications for Guys

Guying Construction Drawings

F ANCHOR ASSEMBLY UNITS

Index F

Construction Specifications for Anchoring

Table F: Soil Classifications

Anchor Construction Drawings

G TRANSFORMER ASSEMBLY UNITS

Index G

Construction Specifications for Taps, Jumpers, and Arresters

Transformer Construction Drawings

H GROUNDING ASSEMBLY UNITS

Index H

Construction Specifications for Grounding

Grounding Construction Drawings
BULLETIN 1728F-803: INDEX (Continued)

SECTION CATEGORY DESCRIPTIONS

J SECONDARY ASSEMBLY UNITS

Index J

Construction Specifications for Secondaries and Service Drops

Secondary Construction Drawings

K SERVICE ASSEMBLY UNITS

Index K

Service Construction Drawings

L TYING GUIDES

Index L

Tying Guide Drawings

M MISCELLANEOUS ASSEMBLY UNITS AND GUIDES

Index M

Right-of-Way Clearing Specifications

Miscellaneous Construction Drawings and Guides

N NEUTRAL ASSEMBLY UNITS

Index N

Tables VI,VII: Maximum Line Angles

Neutral Construction Drawings

P PROTECTION ASSEMBLY UNITS

Index P

Protection Construction Drawings

Q METERING ASSEMBLY UNITS

Index Q

Metering Construction Drawings

R OIL CIRCUIT RECLOSER ASSEMBLY UNITS

Index R

Oil Circuit Recloser Construction Drawings

S SECTIONALIZING ASSEMBLY UNITS

Index S

Sectionalizing Construction Drawings
BULLETIN 1728F-803: INDEX (Continued)

SECTION CATEGORY DESCRIPTIONS

W WOOD POLES, CROSSARMS AND BRACES

Index W

Construction Specifications for Poles and Crossarms

Table W: Pole Setting Depths

Pole and Crossarm Guides and Assembly Drawings

Y VOLTAGE ALTERATION EQUIPMENT ASSEMBLY UNITS

Index Y

Voltage Alteration Equipment Construction Drawings

APPENDICES

1 TABLE OF SELECTED SI TO METRIC CONVERSIONS

2 DERIVATION OF MAXIMUM PERMISSIBLE LINE ANGLES
GENERAL CONSTRUCTION SPECIFICATIONS

All construction work shall be done in a safe, thorough, and

workmanlike manner in accordance with the staking sheets, plans

and specifications, and the construction drawings.

The provision of 7 CFR section 1724.50 “Compliance with National

Electrical Safety Code (NESC)” applies to all borrower electric

system facilities regardless of the source of financing.

A borrower must ensure that its electric system, including all

electric distribution, transmission, and generating facilities,

is designed, constructed, operated, and maintained in accordance

with all applicable provisions of the most current and accepted

criteria of the National Electrical Safety Code (NESC) and all

applicable and current electrical and safety requirements of any

State or local governmental entity. This requirement applies to

the borrower’s electric system regardless of the source of

financing. Copies of the NESC may be obtained from the Institute

of Electrical and Electronic Engineers, Inc. at the following

address:

IEEE Customer Service

445 Hoes Lane, PO Box 1331

Piscataway, NJ 088555-1331

Any electrical standard requirements established by RUS are in

addition to, and not in substitution for or a modification of,

the most current and accepted criteria of the NESC and any

applicable electrical or safety requirements of any State or

local governmental entity.

Overhead distribution circuits shall be constructed with not less

than the Grade C strength requirements as described in section

26, Strength Requirements, of the NESC when subjected to the

loads specified in NESC Section 25, Loadings for Grades B and C.

Overhead transmission circuits shall be constructed with not less

than the Grade B strength requirements as described in NESC

Section 26.

The drawings of equipment and materials used in the construction

assemblies are meant to depict the general categories of items

found in RUS Informational Publication 202-1, “List of Materials

Acceptable for Use on Systems of RUS Electrification Borrowers,”

(“List of Materials”). Any drawing of any piece of equipment or

material that resembles a specific product of a manufacturer is

unintentional.
Materials to be used for construction are designated by one or

more small alphabetic characters shown on the drawings and in the

“ITEM” column in the material blocks. The borrower may use any

material contained in the “List of Materials” from the category

of material as designated by the corresponding small letter(s).

For example, “b” designates a steel, pole top pin. The borrower

may use, at its discretion, any of the applicable pole top pins

from category “b” of the “List of Materials.”

Similarly, the drawings of the bulletin show the use of three,

4 1/4 inch, ANSI Class 52-9A suspension insulators for 24.9/14.4

kV primary deadends. The borrower may use three, 6 inch, ANSI

Class 52-1 or two, 9 inch, ANSI Class 52-4 suspension insulators,

or one polymer distribution insulator, all of which are contained

in category “k” in the “List of Materials.” In the latter cases,

the quantity (“QTY”) of the insulators to be used must be

modified accordingly.

The Federal Aviation Administration (FAA) requires (14 CFR part

77) that in cases where structures or conductors will exceed a

height of 200 feet, or are within 20,000 feet of an airport, the

nearest regional or area office of the FAA be contacted and FAA

Form 7460-1 be filled if necessary.
CONDUCTOR INSTALLATION SPECIFICATIONS

Conductors must be handled with care. Conductors shall neither

be trampled on nor run over by vehicles. Each reel shall be

examined and the wire inspected for cuts, kinks, or other

injuries. Injured portions shall be cut out and the conductor

spliced. The conductors shall be pulled over suitable rollers or

stringing blocks properly mounted on the pole or crossarm if

necessary to prevent binding while stringing.

Conductors shall be sagged in accordance with the conductor

manufacturer's recommendations. All conductors shall be sagged

evenly. The air temperature at the time and place of sagging

shall be determined by a certified thermometer.

The sag of all conductors after stringing shall be in accordance

with the engineer's instructions.

Conductors shall be spliced and dead-ended as shown on the

construction drawings. There shall be not more than one splice

per conductor in any span and splices shall be located at least

10 feet from the conductor support. No splices shall be located

in Grade B crossing spans and preferably not in adjacent spans.

Splices shall be installed in accordance with the manufacturer's

specifications and recommendations.

All conductors shall be cleaned thoroughly by wirebrushing before

splicing or installing connectors or clamps. A suitable

inhibitor shall be used before splicing or applying connectors

over aluminum conductor.

Connectors and hot-line clamps suitable for the purpose shall be

installed as shown on the drawings and also in accordance with

the manufacturer's specifications and recommendations. On all

hot-line clamp installations, the clamp and jumper shall be

installed so that they are permanently bonded to the load side of

the line, allowing the jumper to be de-energized when the clamp

is disconnected.

The use of stirrups to connect tap conductors (jumper wires) to

primary conductors may be used if the following criteria are met:

• The stirrup and hot line clamp shall be sized to meet or

exceed the current carrying capacity of the tap conductor or

equipment jumper;

• All stirrup conductors shall be made of copper or bronze;

• All stirrup conductors shall be made of #2 copper equivalent

or larger;
• All-purpose or aluminum hot line clamps shall not be used with

stirrups;

• All stirrups, connectors, and clamps shall be installed in

accordance with the manufacturer’s specifications;

• Stirrups with two compression connectors are not to be used in

areas of vibrating conductors;

• Stirrups are not to be used to connect main lines or heavily

loaded tap lines.

Stirrups are not recommended to be used to connect reclosers,

autotransformers, or line regulators. Stirrups and hot line

clamps should not be used for sectionalizing tap and especially

main lines for operational or maintenance purposes. Permanent

compression or bolted type connectors should be used because of

their better current carrying capabilities and reliability. Line

switches, fused cutouts, or solid blade cutouts should be used at

line locations where occasional line sectionalizing may be

required.

At locations where permanent connections using compression or

bolted type connectors are not desired, and where the

installation or sectionalizing equipment is also not desired,

then the standards specify the installation of hot line clamps

(over armor rod on aluminum conductors).
INDEX A

SINGLE-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VA1.0 SINGLE SUPPORT - MISCELLANEOUS

VA1.1, VA1.2 SINGLE SUPPORT - (TANGENT)

VA1.1P, VA1.2P SINGLE SUPPORT - (TANGENT) (POST INSULATORS)

VA1.3 SINGLE SUPPORT

VA1.3P SINGLE SUPPORT (POST INSULATORS)

VA1.11 SINGLE SUPPORT ON CROSSARM

VA1.11P SINGLE SUPPORT ON CROSSARM (POST INSULATORS)

VA1.12G SINGLE PHASE JUNCTION GUIDE

VA2.0 DOUBLE SUPPORT - MISCELLANEOUS

VA2.1 DOUBLE SUPPORT

VA2.1P DOUBLE SUPPORT (POST INSULATORS)

VA2.21 DOUBLE SUPPORT ON CROSSARMS

VA2.21P DOUBLE SUPPORT ON CROSSARMS (POST INSULATORS)

VA3.1 SUSPENSION ANGLE

VA3.2, VA3.3 SUSPENSION ANGLE

VA4.1 DEADEND ANGLE (90° - 150°)

VA4.2 DEADEND ANGLE (20° - 90°)

VA5.1 SINGLE DEADEND

VA5.2, VA5.3, VA5.4 SINGLE DEADENDS

VA5.5G SINGLE PHASE TAP GUIDE

VA5.21, VA5.31 SINGLE DEADEND ON CROSSARMS

VA6.1 DOUBLE DEADEND (STRAIGHT)

VA6.2 DOUBLE DEADEND (FEED THROUGH)

VA6.21 DOUBLE DEADEND ON CROSSARMS

VA6.22G DOUBLE DEADEND GUIDE (FEED THROUGH ON CROSSARMS)
CONSTRUCTION SPECIFICATIONS FOR POLE TOP ASSEMBLIES

Line designs which use high poles to clear obstacles such as

railroads, must avoid upstrain on pin-type or post-type

insulators on adjacent shorter poles.

The neutral conductor should be installed on the same side

(preferably the road side) of all of the tangent and small angle

poles throughout the length of the line.

Prior RUS approval is given if it is under the circumstances

necessary to lower the neutral attachment on standard

construction pole top assemblies an additional distance not

exceeding 2 feet for the purpose of economically meeting

conductor clearance requirements of the NESC.

Prior RUS approval is given if it is under the circumstances

necessary to lower the neutral attachment on standard

construction pole top assemblies an additional distance of up to

6 feet for the purpose of performing construction and future line

maintenance on these assemblies from bucket trucks designed for

such work.

With pin-type or post-type insulators, the conductor must be tied

to the top groove of the insulator on tangent poles and on the

side of the insulator away from the strain at angles. Pin-type

and post-type insulators must be tight on the pins and bracket,

respectively, and the top groove must be in line with the

conductor after tying.

Factory-formed ties must be installed in accordance with the

manufacturer’s specifications and recommendations.

A 3 inch by 3 inch (minimum), square, curved washer, item “d”,

shall be used abutting the pole when installing primary or

neutral conductor deadend assemblies directly to the pole to

mitigate the crushing of wood fibers and to facilitate the

allowable longitudinal loading as given in the design parameters

on the construction drawings.

A locknut must be installed with each nut and eyenut, on all

machine, upset and double arming bolts, and all other threaded

hardware such as insulator pins and studs.

The calculated “maximum line angle” values in the tables are

based on the “designated maximum” transverse loading on insulator

pins as specified by RUS, and the application of the appropriate

overload factors from the 1997 edition of the NESC.
“Allowable longitudinal (or transverse) loading” values in the

design parameters were derived from known or designated maximum

strengths of materials to which the appropriate NESC safety

factors have already been applied.
TABLE I

MAXIMUM LINE ANGLES ON PIN INSULATOR ASSEMBLIES

Designated Maximum Transverse Load = 500 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 13 13 12 12 11 11

2 ACSR (6/1) 11 10 10 9 8 8

2 ACSR (7/1) 8 8 7 7 6 6

1/0 ACSR (6/1) 7 6 6 5 5 4

123.3 AAAC (7) 7 6 6 5 5 4

2/0 ACSR (6/1) 6 6 5 5 4 4

3/0 ACSR (6/1) 5 5 4 4 3 3

4/0 ACSR (6/1) 5 4 4 3 3 2

246.9 AAAC (7) 5 4 4 3 3 2

336.4 ACSR (18/1) 4 4 3 2 2 1

336.4 ACSR (26/7) 3 2 2 2 1 1

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 13 12 11 11 10 9

2 ACSR (6/1) 11 10 9 8 8 7

2 ACSR (7/1) 8 8 7 7 6 6

1/0 ACSR (6/1) 7 6 6 5 5 4

123.3 AAAC (7) 7 6 6 5 5 4

2/0 ACSR (6/1) 7 6 6 5 5 4

3/0 ACSR (6/1) 5 5 4 4 3 3

4/0 ACSR (6/1) 5 5 4 4 3 3

246.9 AAAC (7) 5 5 4 4 3 3

336.4 ACSR (18/1) 5 4 4 3 3 2

336.4 ACSR (26/7) 3 3 3 2 2 2

HEAVY LOADING DISTRICT

4 ACSR (7/1) 11 10 9 8 6 5

2 ACSR (6/1) 9 8 7 6 5 4

2 ACSR (7/1) 7 6 6 5 4 3

1/0 ACSR (6/1) 6 5 4 4 3 2

123.3 AAAC (7) 6 5 4 4 3 2

2/0 ACSR (6/1) 6 5 4 3 3 2

3/0 ACSR (6/1) 5 4 3 3 2 1

4/0 ACSR (6/1) 4 4 3 2 2 1

246.9 AAAC (7) 4 4 3 2 2 1

336.4 ACSR (18/1) 4 3 3 2 1 1

336.4 ACSR (26/7) 3 2 2 1 1 0
TABLE II

MAXIMUM LINE ANGLES ON PIN INSULATOR ASSEMBLIES

Designated Maximum Transverse Load = 750 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 21 21 20 19 19 18

2 ACSR (6/1) 17 17 16 15 15 14

2 ACSR (7/1) 13 13 12 12 11 11

1/0 ACSR (6/1) 11 10 10 9 9 8

123.3 AAAC (7) 11 10 10 9 9 8

2/0 ACSR (6/1) 11 10 9 9 8 8

3/0 ACSR (6/1) 8 8 7 7 6 6

4/0 ACSR (6/1) 8 8 7 6 6 5

246.9 AAAC (7) 8 7 7 6 6 5

336.4 ACSR (18/1) 7 7 6 5 5 4

336.4 ACSR (26/7) 5 5 4 4 3 3

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 21 20 19 18 18 17

2 ACSR (6/1) 17 16 16 15 14 13

2 ACSR (7/1) 13 13 12 12 11 10

1/0 ACSR (6/1) 11 10 10 9 9 8

123.3 AAAC (7) 11 10 10 9 9 8

2/0 ACSR (6/1) 11 10 10 9 9 8

3/0 ACSR (6/1) 8 8 8 7 7 6

4/0 ACSR (6/1) 8 8 7 7 6 6

246.9 AAAC (7) 8 8 7 7 6 6

336.4 ACSR (18/1) 8 7 7 6 6 5

336.4 ACSR (26/7) 5 5 5 4 4 4

HEAVY LOADING DISTRICT

4 ACSR (7/1) 19 18 17 15 14 13

2 ACSR (6/1) 16 15 13 12 11 10

2 ACSR (7/1) 12 11 10 10 9 8

1/0 ACSR (6/1) 10 9 8 8 7 6

123.3 AAAC (7) 10 9 8 8 7 6

2/0 ACSR (6/1) 10 9 8 7 7 6

3/0 ACSR (6/1) 8 7 7 6 5 5

4/0 ACSR (6/1) 8 7 6 6 5 4

246.9 AAAC (7) 7 7 6 6 5 4

336.4 ACSR (18/1) 7 7 6 5 4 4

336.4 ACSR (26/7) 5 5 4 4 3 3
TABLE III

MAXIMUM LINE ANGLES ON PIN INSULATOR ASSEMBLIES

Designated Maximum Transverse Load = 1,000 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 29 28 28 27 27 26

2 ACSR (6/1) 24 23 22 22 21 21

2 ACSR (7/1) 18 18 17 17 16 16

1/0 ACSR (6/1) 15 14 14 13 13 13

123.3 AAAC (7) 15 14 14 13 13 12

2/0 ACSR (6/1) 15 14 14 13 12 12

3/0 ACSR (6/1) 12 11 11 10 10 9

4/0 ACSR (6/1) 11 11 10 10 9 9

246.9 AAAC (7) 11 10 10 9 9 8

336.4 ACSR (18/1) 11 10 9 9 8 7

336.4 ACSR (26/7) 7 7 6 6 5 5

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 28 28 27 26 25 24

2 ACSR (6/1) 23 23 22 21 21 20

2 ACSR (7/1) 18 18 17 17 16 15

1/0 ACSR (6/1) 15 14 14 13 13 12

123.3 AAAC (7) 15 14 14 13 13 12

2/0 ACSR (6/1) 15 14 14 13 13 12

3/0 ACSR (6/1) 12 11 11 10 10 10

4/0 ACSR (6/1) 12 11 11 10 10 9

246.9 AAAC (7) 11 11 10 10 9 9

336.4 ACSR (18/1) 11 10 10 9 9 8

336.4 ACSR (26/7) 8 7 7 7 6 6

HEAVY LOADING DISTRICT

4 ACSR (7/1) 27 26 24 23 22 20

2 ACSR (6/1) 22 21 20 19 18 16

2 ACSR (7/1) 17 16 15 15 14 13

1/0 ACSR (6/1) 14 13 13 12 11 10

123.3 AAAC (7) 14 13 12 12 11 10

2/0 ACSR (6/1) 14 13 12 12 11 10

3/0 ACSR (6/1) 11 10 10 9 8 8

4/0 ACSR (6/1) 11 10 10 9 8 8

246.9 AAAC (7) 11 10 9 9 8 7

336.4 ACSR (18/1) 10 10 9 8 8 7

336.4 ACSR (26/7) 7 7 6 6 5 5
TABLE IV

MAXIMUM LINE ANGLES ON PIN INSULATOR ASSEMBLIES

Designated Maximum Transverse Load = 1,500 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 45 44 44 43 42 42

2 ACSR (6/1) 37 36 35 35 34 33

2 ACSR (7/1) 28 28 27 27 26 26

1/0 ACSR (6/1) 23 23 22 22 21 21

123.3 AAAC (7) 23 22 22 21 21 20

2/0 ACSR (6/1) 23 22 22 21 21 20

3/0 ACSR (6/1) 18 18 17 17 16 16

4/0 ACSR (6/1) 18 17 17 16 16 15

246.9 AAAC (7) 17 17 16 16 15 15

336.4 ACSR (18/1) 17 16 15 15 14 14

336.4 ACSR (26/7) 12 11 11 10 10 9

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 44 44 43 42 41 40

2 ACSR (6/1) 36 36 35 34 33 33

2 ACSR (7/1) 28 28 27 27 26 25

1/0 ACSR (6/1) 23 23 22 22 21 21

123.3 AAAC (7) 23 22 22 21 21 20

2/0 ACSR (6/1) 23 22 22 21 21 20

3/0 ACSR (6/1) 18 18 17 17 17 16

4/0 ACSR (6/1) 18 18 17 17 16 16

246.9 AAAC (7) 18 17 17 16 16 15

336.4 ACSR (18/1) 17 17 16 16 15 15

336.4 ACSR (26/7) 12 12 11 11 11 10

HEAVY LOADING DISTRICT

4 ACSR (7/1) 43 41 40 39 37 36

2 ACSR (6/1) 35 34 33 32 30 29

2 ACSR (7/1) 27 26 25 25 24 23

1/0 ACSR (6/1) 22 22 21 20 19 19

123.3 AAAC (7) 22 21 21 20 19 18

2/0 ACSR (6/1) 22 21 21 20 19 18

3/0 ACSR (6/1) 18 17 16 16 15 14

4/0 ACSR (6/1) 17 17 16 15 15 14

246.9 AAAC (7) 17 16 16 15 14 14

336.4 ACSR (18/1) 17 16 15 14 14 13

336.4 ACSR (26/7) 12 11 11 10 10 9
TABLE V

MAXIMUM LINE ANGLES ON PIN INSULATOR ASSEMBLIES

Designated Maximum Transverse Load = 2,000 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 60 60 60 60 59 59

2 ACSR (6/1) 50 50 49 48 48 47

2 ACSR (7/1) 39 38 38 37 37 36

1/0 ACSR (6/1) 32 31 31 30 30 29

123.3 AAAC (7) 31 31 30 30 29 29

2/0 ACSR (6/1) 31 31 30 30 29 28

3/0 ACSR (6/1) 25 24 24 23 23 22

4/0 ACSR (6/1) 24 24 23 23 22 22

246.9 AAAC (7) 24 23 23 22 22 21

336.4 ACSR (18/1) 23 22 22 21 20 20

336.4 ACSR (26/7) 16 16 15 15 14 14

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 60 60 60 59 58 57

2 ACSR (6/1) 50 49 48 48 47 46

2 ACSR (7/1) 39 38 37 37 36 36

1/0 ACSR (6/1) 32 31 31 30 30 29

123.3 AAAC (7) 31 31 30 30 29 29

2/0 ACSR (6/1) 31 31 30 30 29 29

3/0 ACSR (6/1) 25 24 24 24 23 23

4/0 ACSR (6/1) 25 24 24 23 23 22

246.9 AAAC (7) 24 24 23 23 22 22

336.4 ACSR (18/1) 24 23 23 22 22 21

336.4 ACSR (26/7) 16 16 16 15 15 15

HEAVY LOADING DISTRICT

4 ACSR (7/1) 60 58 57 55 54 52

2 ACSR (6/1) 49 47 46 45 44 43

2 ACSR (7/1) 38 37 36 35 34 33

1/0 ACSR (6/1) 31 30 29 28 28 27

123.3 AAAC (7) 30 30 29 28 27 26

2/0 ACSR (6/1) 30 30 29 28 27 26

3/0 ACSR (6/1) 24 24 23 22 22 21

4/0 ACSR (6/1) 24 23 23 22 21 21

246.9 AAAC (7) 23 23 22 21 21 20

336.4 ACSR (18/1) 23 22 21 21 20 19

336.4 ACSR (26/7) 16 16 15 14 14 13

























INDEX B

TWO-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VB1.11, VB1.12 SINGLE SUPPORT ON CROSSARM (TANGENT)

VB1.11P, VB1.12P SINGLE SUPPORT ON CROSSARM (TANGENT)

 (POST INSULATORS)

VB1.13 SINGLE SUPPORT ON CROSSARM

VB1.13P SINGLE SUPPORT ON CROSSARM (POST INSULATORS)

VB1.14 SINGLE SUPPORT, NEUTRAL ON CROSSARM

VB1.14P SINGLE SUPPORT, NEUTRAL ON CROSSARM

 (POST INSULATORS)

VB2.21 DOUBLE SUPPORT ON CROSSARMS

VB2.21P DOUBLE SUPPORT ON CROSSARMS (POST INSULATORS)

VB2.22 DOUBLE SUPPORT, NEUTRAL ON CROSSARMS

VB2.22P DOUBLE SUPPORT, NEUTRAL ON CROSSARMS

 (POST INSULATORS)

VB3.1 SUSPENSION ANGLE

VB4.1 DEADEND ANGLE (90° - 150°)

VB5.1 SINGLE DEADEND

VB5.21, VB5.31 SINGLE DEADEND ON CROSSARMS

VB6.21 DOUBLE DEADEND ON CROSSARMS















INDEX C

THREE-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VC1.11, VC1.12 SINGLE SUPPORT ON CROSSARM (TANGENT)

VC1.11L, VC1.12L SINGLE SUPPORT ON CROSSARM (TANGENT)

 (LARGE CONDUCTORS)

VC1.11P, VC1.12P SINGLE SUPPORT ON CROSSARM (TANGENT)

 (POST INSULATORS)

VC1.13 SINGLE SUPPORT ON CROSSARM

VC1.13L SINGLE SUPPORT ON CROSSARM

 (LARGE CONDUCTORS)

VC1.13P SINGLE SUPPORT ON CROSSARM

 (POST INSULATORS)

VC1.41 SINGLE SUPPORT, NEUTRAL ON CROSSARM

VC1.41L SINGLE SUPPORT, NEUTRAL ON CROSSARM

 (LARGE CONDUCTORS)

VC1.41P SINGLE SUPPORT, NEUTRAL ON CROSSARM

 (POST INSULATORS)

VC1.81G THREE-PHASE JUNCTION GUIDE

VC2.21 DOUBLE SUPPORT ON CROSSARMS

VC2.21L DOUBLE SUPPORT ON CROSSARMS

 (LARGE CONDUCTORS)

VC2.21P DOUBLE SUPPORT ON CROSSARMS

 (POST INSULATORS)

VC2.51 DOUBLE SUPPORT, NEUTRAL ON CROSSARMS

VC2.51L DOUBLE SUPPORT, NEUTRAL ON CROSSARMS

 (LARGE CONDUCTORS)

VC2.51P DOUBLE SUPPORT, NEUTRAL ON CROSSARMS

 (POST INSULATORS)

VC2.52 DOUBLE SUPPORT ON 10 FOOT CROSSARMS

VC2.52L DOUBLE SUPPORT ON 10 FOOT CROSSARMS

 (LARGE CONDUCTORS)
INDEX C

(page 2)

THREE-PHASE PRIMARY POLE TOP ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VC2.52P DOUBLE SUPPORT ON 10 FOOT CROSSARMS

 (POST INSULATORS)

VC3.1 SUSPENSION ANGLE

VC3.2L SUSPENSION ANGLE

 (LARGE CONDUCTORS)

VC4.1 DEADEND ANGLE

 (ACUTE)

VC4.2L DEADEND ANGLE

 (LARGE CONDUCTORS)

VC5.1 SINGLE DEADEND - VERTICAL

VC5.2L SINGLE DEADEND - VERTICAL

 (LARGE CONDUCTORS)

VC5.11G SINGLE PHASE TAP GUIDE

VC5.21, VC5.31 SINGLE DEADEND ON CROSSARMS

VC5.71L SINGLE DEADEND ON CROSSARM ASSEMBLY

VC5.82G THREE PHASE HORIZONTAL TAP GUIDE

VC6.21, VC6.31 DOUBLE DEADEND ON CROSSARMS

VC6.51 DOUBLE DEADEND ON 10 FOOT CROSSARMS

VC6.52G DOUBLE DEADEND ON 10 FOOT CROSSARMS

(FEEDTHROUGH GUIDE)

VC6.91G DOUBLE DEADENDS (BUCKARMS) GUIDE

































INDEX D

DOUBLE CIRCUIT PRIMARY POLE TOP ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VD1.81, VD1.82 SINGLE SUPPORT ON CROSSARMS (TANGENT)

VD1.81L, VD1.82L SINGLE SUPPORT ON CROSSARMS (TANGENT)

 (LARGE CONDUCTORS)

VD1.81P, VD1.82P SINGLE SUPPORT ON CROSSARMS (TANGENT)

 (POST INSULATORS)

VD1.83 SINGLE SUPPORT ON CROSSARMS

VD1.83L SINGLE SUPPORT ON CROSSARMS

 (LARGE CONDUCTORS)

VD1.83P SINGLE SUPPORT ON CROSSARMS

 (POST INSULATORS)

VD2.91 DOUBLE SUPPORT ON CROSSARMS

VD2.91L DOUBLE SUPPORT ON CROSSARMS

 (LARGE CONDUCTORS)

VD2.91P DOUBLE SUPPORT ON CROSSARMS

 (POST INSULATORS)

VD3.1G SUSPENSION ANGLE GUIDE

VD4.1G DEADEND ANGLE GUIDE

VD5.91G THREE PHASE TAP GUIDE

VD6.91 DOUBLE DEADENDS ON CROSSARMS

 (FEEDTHROUGH)













INDEX E

GUYING ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

E1.1 SINGLE DOWN GUY

 (THROUGH BOLT TYPE)

E1.01, E2..01 SINGLE OVERHEAD GUY

 (THROUGH BOLT TYPE)

E2.1 SINGLE DOWN GUY GUIDE - HEAVY DUTY

 (THROUGH BOLT TYPE)

E2.2G DOUBLE DOWN GUY GUIDE - HEAVY DUTY

 (THROUGH BOLT TYPE)

E2.3G THREE DOWN GUY GUIDE - HEAVY DUTY

 (THROUGH BOLT TYPE)

E3.1 SINGLE DOWN GUY

 (WRAPPED TYPE)

E4.1L SINGLE DOWN GUY - LARGE CONDUCTORS

 (POLE BAND TYPE)

E4.4LG FOUR DOWN GUY GUIDE - LARGE CONDUCTORS

 (POLE BAND TYPE)

E5.1G GUY STRAIN INSULATOR GUIDE
CONSTRUCTION SPECIFICATIONS FOR GUYS

Guys shall be placed before the conductors are strung and shall

be attached to the pole as shown in the construction drawings.

The grade of construction of the guys shall be the same as the

structure or the highest grade required for any other conductors

supported by the pole or structure.

Deadend structure guys shall be installed in line with the pull

of conductors as nearly as practical. Bisector guys at an angle

structure shall be installed as nearly as practical to the true

bisector of the line angle.

A 1:1 slope for guy leads is recommended, especially on deadend

structures. Minimum guy leads are not recommended.

The applicable NESC safety factors have not been but must be

applied to determine the “allowable guy wire tension” as denoted

in the design parameters of the guying assembly units.









INDEX F

ANCHOR ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

F1.6, F1.8, F1.10, F1.12 EXPANDING TYPE ANCHORS

F2.6, F2.8, F2.10, F2.12 SCREW ANCHORS, (POWER-INSTALLED)

F3.6, F3.8, F3.10, F3.12 PLATE TYPE ANCHORS

F4.1, F4.2 SERVICE ANCHORS

F5.1, F5.2, F5.3 ROCK ANCHORS

F6.6, F6.8, F6.10 SWAMP ANCHORS (POWER INSTALLED)
CONSTRUCTION SPECIFICATIONS FOR ANCHORING

All anchors and rods shall be in line with the strain and shall

be installed so that approximately 6 inches of the rod remains

out of the ground. In cultivated fields or other locations, as

deemed necessary, the projection of the anchor rod above earth

may be increased to a maximum of 12 inches to prevent burial of

the rod eye. The backfill of all anchor holes must be thoroughly

tamped the full depth.

After a cone anchor has been set in place, the hole shall be

backfilled with coarse crushed rock for 2 feet above the anchor

and tamped during the filling. The remainder of the hole shall

be backfilled and tamped with dirt.

The maximum load with overload factors transferred to the anchor

should not exceed the designated maximum holding power given in

the design parameters on the anchor assembly drawing. The rating

is coordinated with the maximum holding power of average, class

5, soil conditions.

When the anchor is used in poorer soils, the holding power of the

anchor should be derated. A suggested guide is to derate by 25

percent in class 6 soil and by 50 percent in class 7 soil. For

class 8 soil it is usually necessary to use swamp anchors or

power driven screw anchors which can penetrate the poor soil into

firmer soil.

(See Table F)

Log type anchors are acceptable for use on distribution systems.

Refer to the appropriate drawings in RUS Bulletin 1728F-811

“Electric Transmission Specifications and Drawings, 115 kV

through 230 kV”, for assembly units and construction details.
TABLE F

Soil Classifications

CLASS ENGINEERING DESCRIPTION

0 Sound hard rock, unweatherd

1 Very dense and/or cemented sands;

coarse gravel and cobbles

2 Dense fine sand; very hard silts and

clays (may be preloaded)

3 Dense clayed sand sand gravel;

very stiff to hard silts and clays

4 Medium dense sandy gravel; very stiff

to hard silts and clays

5 Medium dense coarse sand and sandy gravels;

stiff to very stiff silts and clays

6 Loose to medium dense fine to coarse sand;

firm to stiff clays and silts

7 Loose fine sand; alluvium; loess;

soft-firm clays; varved clays; fill

8 Peat; organic silts; inundated silts; fly ash






INDEX G

TRANSFORMER ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

G1.1G TRANSFORMER INSTALLATION GUIDE

 SINGLE -PHASE, POLE-TYPE TRANSFORMER

VG1.2 SINGLE-PHASE, CSP TRANSFORMER (TANGENT POLE)

VG1.3 SINGLE-PHASE, CSP TRANSFORMER (DEADEND POLE)

VG1.4, VG1.5 SINGLE-PHASE, CONVENTIONAL TRANSFORMER

 (TANGENT POLE)

VG1.6 SINGLE-PHASE, CONVENTIONAL TRANSFORMER

 (DEADEND POLE)

VG1.7 SINGLE-PHASE, CONVENTIONAL TRANSFORMER

 (TANGENT POLE)

VG1.8 SINGLE-PHASE, CONVENTIONAL TRANSFORMER

 (DEADEND POLE)

VG2.1 TWO-PHASE TRANSFORMER BANK

OPEN-WYE PRIMARY

OPEN-DELTA, 4 WIRE SECONDARY

G2.1G TRANSFORMER/METER CONNECTION GUIDE

THREE-PHASE, OPEN-WYE - OPEN DELTA

FOR 120/240 VOLT POWER LOADS

VG3.1 THREE-PHASE TRANSFORMER BANK

UNGROUNDED-WYE PRIMARY

CENTER-TAP GROUNDED DELTA, 4 WIRE SECONDARY

G3.1G TRANSFORMER/METER CONNECTION GUIDE

UNGROUNDED WYE - CENTER TAP GROUNDED DELTA

FOR 120/240 VOLT POWER LOADS

VG3.2 THREE-PHASE TRANSFORMER BANK

UNGROUNDED WYE - PRIMARY

CORNER GROUNDED DELTA, 3 WIRE SECONDARY

G3.2G TRANSFORMER/METER CONNECTION GUIDE

UNGROUNDED WYE - CORNER GROUNDED DELTA

FOR 240 OR 480 VOLT POWER LOADS

VG3.3 THREE-PHASE TRANSFORMER BANK

GROUNDED-WYE PRIMARY

GROUNDED WYE, 4 WIRE SECONDARY

G3.3G TRANSFORMER/METER CONNECTION GUIDE

GROUNDED WYE - GROUNDED WYE

FOR 120/208 VOLT POWER LOADS
CONSTRUCTION SPECIFICATIONS FOR TAPS, JUMPERS, AND ARRESTERS

Jumpers and other leads connected to line conductors shall have

sufficient slack to allow free movement of the conductors. Where

slack is not shown on the construction drawings, it will be

provided by at least two (2) bends in a vertical plane, or one

(1) in a horizontal plane, or the equivalent. In areas where

aeolian vibration occurs, special measures to minimize the

effects of jumper breaks shall be used as may be specified.

All leads on equipment, such as transformers, reclosers, etc.,

shall be a minimum of #6 copper conductivity. Where aluminum

jumpers are used, a connection to an unplated bronze terminal

shall be made by splicing a short stub of copper to the aluminum

jumpers using a compression connector suitable for the bimetallic

connection.

Where applicable, the external gap electrodes of surge arresters,

combination arrester cutout units, and transformers mounted

arresters shall be adjusted to the manufacturer’s recommended

spacing. Care shall be taken so that the adjusted gap is not

disturbed when the equipment is installed.

It may be necessary, and is permissible, to lower the neutral

attachment on standard construction pole top assemblies an

additional distance not exceeding 2 feet to provide adequate

clearance between cutout and single-phase, conventional

distribution transformers.















INDEX H

GROUNDING ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

H1.1 GROUNDING ASSEMBLY - GROUND ROD TYPE

H2.1 GROUNDING ASSEMBLY - TRENCH TYPE

H3.1 GROUNDING ASSEMBLY - GROUND ROD TYPE

(FOR SECTIONALIZING AIRBREAK SWITCH)

H4.1 GROUNDING ASSEMBLY - PLATFORM TYPE

(FOR SECTIONALIZING AIRBREAK SWITCH)
CONSTRUCTION SPECIFICATIONS FOR GROUNDING

Ground rods shall be driven full length in undisturbed earth in

accordance with the construction drawings. They shall be

installed a minimum of 2 feet from the face of the pole. The top

of the ground rods shall be at least 12 inches below the surface

of the earth. The ground wire shall be attached to the rod with

an appropriate ground rod clamp and shall be secured to the pole

with staples. The staples on the ground wire shall be spaced 2

feet part, except for a distance of 8 feet above the ground and 8

feet down from the top of the pole, as applicable, where they

shall be 6 inches apart.

The connection between the ground rod and the system neutral

should be made by one continuous piece of conductor, (the pole

ground wire), and installed in the shortest and most direct path

according to the construction drawings. If a splice is required,

it shall be made using a compression type connector. Such a

splice shall only be installed a minimum of 6 inches above the

ground line. The pole ground wire shall be connected to the

system neutral using a compression type connector.

All equipment shall have at least 2 connections from the frame,

case, or tank to the multi-grounded system neutral conductor.

The pole ground wire may be used for one or both of these

connections.

All neutral conductors on the pole shall be connected directly to

each other, and connected to the pole ground wire if present.

Ground connections, in addition to the ones required and

specified herein, are acceptable unless they add undue congestion

on the structure.

All equipment ground wires, neutral conductors, downguys,

messenger wires, and surge-protection ground wires shall be

interconnected and attached to a common (pole) ground wire in

accordance with the requirements of, or exempted by, the National

Electrical Safety Code.




INDEX J

SECONDARY ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

J1.1, J1.2 SECONDARY ASSEMBLIES (SMALL ANGLE)

J2.1, J2.2 SECONDARY ASSEMBLIES (LARGE ANGLE)

J3.1, J4.1 SECONDARY ASSEMBLIES (DEADEND, MISC.)
CONSTRUCTION SPECIFICATIONS FOR SECONDARIES

 AND SERVICE DROPS

Secondary conductors may be bare or covered wires or multiconductor service cable. The conductors shall be sagged in

accordance with the manufacturer’s recommendations.

Conductors for secondary underbuild on primary lines have

normally been, and still may be bare, except in those

circumstances where other conditions, such as long primary span

lengths, may necessitate that covered wires or service cable may

be or should be used. Service drops shall be covered wire or

service cable.

Secondaries and service drops shall be so installed as not to

obstruct the climbing space on poles. There shall not be more

than one splice per conductor in any span, and splices shall be

located at least 10 feet from the conductor support. Where the

same covered conductors or service cables are to be used for the

secondary and service drop, they may be installed in one

continuous run.



INDEX K

SERVICE ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

K1.1, K1.2 SERVICE ASSEMBLIES (POLE MOUNTED)

K1.3, K1.4 SERVICE ASSEMBLIES (POLE MOUNTED)

K2.1, K2.2, K2.3 SERVICE ASSEMBLIES

K3.1, K3.2 SERVICE ASSEMBLIES (MAST TYPE)

K4.1G CABLE SERVICE ASSEMBLY GUIDE

K4.2G MAST TYPE SERVICE ASSEMBLY GUIDE

K4.3G POLE TYPE SERVICE ASSEMBLY GUIDE

K4.4G YARD POLE METER INSTALLATION GUIDE








INDEX L

TYING GUIDES

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VL1.1G TYING GUIDE

PRIMARY ANGLE ASSEMBLIES

VL1.2G TYING GUIDE

PRIMARY DEADEND ASSEMBLIES

L2.1G TYING GUIDE

NEUTRAL ANGLE ASSEMBLIES

L2.2G TYING GUIDE

NEUTRAL DEADEND ASSEMBLIES

L3.1G TYING GUIDE

NEUTRAL & SECONDARY ANGLE ASSEMBLIES

L3.2G TYING GUIDE

NEUTRAL & SECONDARY DEADEND ASSEMBLIES (COPPER)

L3.3G TYING GUIDE

NEUTRAL & SECONDARY DEADEND ASSEMBLIES (ACSR)

L4.1G TYING GUIDE

SERVICE ASSEMBLIES

L4.2G TYING GUIDE

SERVICE ASSEMBLIES, CABLE









INDEX M

MISCELLANEOUS ASSEMBLY UNITS AND GUIDES

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

M1.30G RIGHT-OF-WAY CLEARING GUIDE
RIGHT-OF-WAY CLEARING SPECIFICATIONS

The right-of-way shall be prepared by removing trees, clearing

underbrush, and trimming trees so that the right-of-way is

cleared close to the ground and to the width specified. However,

low growing shrubs, which will not interfere with the operation

or maintenance of the line, shall be left undisturbed if so

directed by the owner. Slash may be chipped and blown on the

right-of-way if so specified.

The landowner’s written permission shall be received prior to

cutting trees outside of the right-of-way. Trees fronting each

side of the right-of-way shall be trimmed symmetrically unless

otherwise specified. Dead trees beyond the right-of-way which

would strike the line in falling shall be removed. Leaning trees

beyond the right-of-way which would strike the line in falling

and which would require topping if not removed, shall either be

removed or topped, except that shade, fruit, or ornamental trees

shall be trimmed and not removed, unless otherwise authorized.

INDEX N

NEUTRAL ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

N1.1, N1.2 NEUTRAL ASSEMBLIES - TANGENT

N1.11, N2.21 NEUTRAL SUPPORTS ON CROSSARMS

N2.1, N2.1L, N3.1 NEUTRAL ASSEMBLIES - LARGE ANGLE

N5.1, N5.2 NEUTRAL ASSEMBLIES - SINGLE DEADENDS

N6.1 NEUTRAL ASSEMBLY - DOUBLE DEADEND

N6.21 NEUTRAL ASSEMBLY - DOUBLE DEADEND ON CROSSARMS
TABLE VI

MAXIMUM LINE ANGLES ON SPOOL INSULATOR ASSEMBLIES

(ANSI Clss 53-2 Spool Insulator)

Designated Maximum Transverse Load = 1,500 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 45 44 44 43 42 42

2 ACSR (6/1) 37 36 35 35 34 33

2 ACSR (7/1) 28 28 27 27 26 26

1/0 ACSR (6/1) 23 23 22 22 21 21

123.3 AAAC (7) 23 22 22 21 21 20

2/0 ACSR (6/1) 23 22 22 21 21 20

3/0 ACSR (6/1) 18 18 17 17 16 16

4/0 ACSR (6/1) 18 17 17 16 16 15

246.9 AAAC (7) 17 17 16 16 15 15

336.4 ACSR (18/1) 17 16 15 15 14 14

336.4 ACSR (26/7) 12 11 11 10 10 9

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 44 44 43 42 41 40

2 ACSR (6/1) 36 36 35 34 33 33

2 ACSR (7/1) 28 28 27 27 26 25

1/0 ACSR (6/1) 23 23 22 22 21 21

123.3 AAAC (7) 23 22 22 21 21 20

2/0 ACSR (6/1) 23 22 22 21 21 20

3/0 ACSR (6/1) 18 18 17 17 17 16

4/0 ACSR (6/1) 18 18 17 17 16 16

246.9 AAAC (7) 18 17 17 16 16 15

336.4 ACSR (18/1) 17 17 16 16 15 15

336.4 ACSR (26/7) 12 12 11 11 11 10

HEAVY LOADING DISTRICT

4 ACSR (7/1) 43 41 40 39 37 36

2 ACSR (6/1) 35 34 33 32 30 29

2 ACSR (7/1) 27 26 25 25 24 23

1/0 ACSR (6/1) 22 22 21 20 19 19

123.3 AAAC (7) 22 21 21 20 19 18

2/0 ACSR (6/1) 22 21 21 20 19 18

3/0 ACSR (6/1) 18 17 16 16 15 14

4/0 ACSR (6/1) 17 17 16 15 15 14

246.9 AAAC (7) 17 16 16 15 14 14

336.4 ACSR (18/1) 17 16 15 14 14 13

336.4 ACSR (26/7) 12 11 11 10 10 9
TABLE VII

MAXIMUM LINE ANGLES ON SPOOL INSULATOR ASSEMBLIES

(ANSI Clss 53-4 Spool Insulator)

Designated Maximum Transverse Load = 1,500 Lbs./Conductor

WIND SPAN (feet)

CONDUCTOR SIZE 150 200 250 300 350 400

 LIGHT LOADING DISTRICT

4 ACSR (7/1) 45 44 44 43 42 42

2 ACSR (6/1) 37 36 35 35 34 33

2 ACSR (7/1) 28 28 27 27 26 26

1/0 ACSR (6/1) 23 23 22 22 21 21

123.3 AAAC (7) 23 22 22 21 21 20

2/0 ACSR (6/1) 23 22 22 21 21 20

3/0 ACSR (6/1) 18 18 17 17 16 16

4/0 ACSR (6/1) 18 17 17 16 16 15

246.9 AAAC (7) 17 17 16 16 15 15

336.4 ACSR (18/1) 17 16 15 15 14 14

336.4 ACSR (26/7) 12 11 11 10 10 9

MEDIUM LOADING DISTRICT

4 ACSR (7/1) 44 44 43 42 41 40

2 ACSR (6/1) 36 36 35 34 33 33

2 ACSR (7/1) 28 28 27 27 26 25

1/0 ACSR (6/1) 23 23 22 22 21 21

123.3 AAAC (7) 23 22 22 21 21 20

2/0 ACSR (6/1) 23 22 22 21 21 20

3/0 ACSR (6/1) 18 18 17 17 17 16

4/0 ACSR (6/1) 18 18 17 17 16 16

246.9 AAAC (7) 18 17 17 16 16 15

336.4 ACSR (18/1) 17 17 16 16 15 15

336.4 ACSR (26/7) 12 12 11 11 11 10

HEAVY LOADING DISTRICT

4 ACSR (7/1) 43 41 40 39 37 36

2 ACSR (6/1) 35 34 33 32 30 29

2 ACSR (7/1) 27 26 25 25 24 23

1/0 ACSR (6/1) 22 22 21 20 19 19

123.3 AAAC (7) 22 21 21 20 19 18

2/0 ACSR (6/1) 22 21 21 20 19 18

3/0 ACSR (6/1) 18 17 16 16 15 14

4/0 ACSR (6/1) 17 17 16 15 15 14

246.9 AAAC (7) 17 16 16 15 14 14

336.4 ACSR (18/1) 17 16 15 14 14 13

336.4 ACSR (26/7) 12 11 11 10 10 9






INDEX P

PROTECTION ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VP1.01, VP1.1 SURGE ARRESTER - SINGLE PHASE

VP1.3 SURGE ARRESTER - 3 SINGLE PHASE

P2.1 POLE PROTECTION ASSEMBLY - PLATE TYPE

P2.2, P2.3 POLE PROTECTION ASSEMBLY - WRAP-AROUND TYPE

VP3.1G RAPTOR PROTECTION ASSEMBLY GUIDE

SUPPORT ON 8 FOOT CROSSARMS (TANGENT)

VP3.2G RAPTOR PROTECTION ASSEMBLY GUIDE

SUPPORT ON 10 FOOT CROSSARMS (TANGENT)

VP3.3G RAPTOR PROTECTION PERCH GUARDS - GUIDE







INDEX Q

METERING ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

Q1.1 SECONDARY METERING

SINGLE PHASE, 120/240 VOLTS

Q3.1 SECONDARY METERING

THREE PHASE, 120/240 VOLTS

(4 WIRE DELTA)

Q3.2 SECONDARY METERING

THREE PHASE, 240 or 480 VOLTS

(3 WIRE CORNER GROUNDED DELTA)

Q3.3 SECONDARY METERING

THREE PHASE, 120/208 VOLTS

(4 WIRE GROUNDED WYE)

VQ4.1 PRIMARY METERING, THREE PHASE

(4 WIRE GROUNDED WYE)





INDEX R

OIL CIRCUIT RECLOSER ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VR1.1 OIL CIRCUIT RECLOSER

VR1.2 OIL CIRCUIT RECLOSER

 (WITH BYPASS CUTOUT)

VR3.1 (THREE) OIL CIRCUIT RECLOSERS

VR3.2 (THREE) OIL CIRCUIT RECLOSERS

 (WITH BYPASS SWITCHES)




INDEX S

SECTIONALIZING ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VS1.01, VS1.02, VS2.01 MISCELLANEOUS CUTOUTS AND DISCONNECT SWITCH

VS1.1 CUTOUT - SINGLE PHASE

VS1.3 CUTOUTS (THREE SINGLE-PHASE)

VS2.31 DISCONNECT SWITCHES (THREE SINGLE-PHASE)

VS2.32 GROUP-OPERATED AIRBREAK SWITCH (THREE-PHASE)





INDEX W

WOOD POLES, CROSSARMS AND BRACES

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

W1.1G POLE FRAMING GUIDE

W2.1G CROSSARM DRILLING GUIDE

W3.1, W3.2 CROSSARM BRACES
CONSTRUCTION SPECIFICATIONS FOR POLES AND CROSSARMS

In distributing the poles, large, choice, dense poles shall be

used at transformer, deadend, angle, and corner locations.

Poles shall be set so that alternate crossarm gains face in

opposite directions, except at terminal and deadends where the

gains of the last two (2) poles shall be on the side facing the

terminal or deadend. On unusually long spans, the poles shall be

set so that the crossarm is located on the side of the pole away

from the long span. On lines that curve, crossarms shall be

installed on the side of the pole which faces the midpoint of the

curve. On sloping terrain, crossarms shall be installed on the

uphill side of the pole. Where pole top insulator brackets or

pole top pins are used, they shall be located on the opposite

side of the pole from the gain.

Poles shall be set in an alignment and plumb, except at corners,

terminal, angles, junctions, or other points of strain, where

they shall be set and raked against the strain so that the

conductors are in line.

Poles shall be raked against the conductor strain not less than 1

inch for each 10 feet of pole length nor more than 2 inches for

each 10 feet of pole length after the conductors are installed at

the required tension.

Pole backfill shall be thoroughly tamped in full depth. Excess

dirt shall be banked around the pole.
TABLE W

Pole Setting Depths

The minimum depth for setting poles must be as follows:

Length of

 Pole (Feet)

Setting in

 Soil (Feet)

Setting in All

 Solid Rock (Feet)

20 4.0 3.0

25 5.0 3.5

30 5.5 3.5

35 6.0 4.0

40 6.0 4.0

45 6.5 4.5

50 7.0 4.5

55 7.5 5.0

60 8.0 5.0

“Setting in Soil” depths must apply:

A. Where poles are to be set in soil;

B. Where there is a layer of soil or more than two (2) feet in depth over solid rock;

C. Where the hole in solid rock is not substantially vertical or the diameter of the hole at the

surface of the rock exceeds approximately twice the diameter of the pole at the same level.

“Setting in All Solid Rock” depths must apply where poles are to

be set in solid rock and where the hole is substantially

vertical, approximately uniform in diameter and large enough to

permit the use of tamping bars the full depth of the hole.

Where there is a layer of soil two (2) feet or less in depth over

solid rock, the depth of the hole must be the depth of the soil

in addition to the depth specified under “Setting in All Solid

Rock” provided, however, that such depth must not exceed the

depth specified under “Setting in Soil.”

On sloping ground, the depth of the hole must be measured from

the low side of the hole.



INDEX Y

VOLTAGE ALTERATION EQUIPMENT ASSEMBLY UNITS

DRAWING NUMBER DRAWING TITLE (DESCRIPTION)

VY1.1 VOLTAGE REGULATOR, POLE MOUNTED

 (ONE SINGLE-PHASE)

VY1.3 VOLTAGE REGULATORS, PLATFORM MOUNTED

 (THREE SINGLE-PHASE)

VY2.1 AUTOTRANSFORMER, POLE MOUNTED

 (ONE SINGLE-PHASE, STEP-DOWN)

VY3.3 THREE-PHASE CAPACITOR BANK




APPENDIX 1

TABLE OF SELECTED SI TO METRIC CONVERSIONS

LENGTH

To Convert From To Multiply By

foot (ft.) meter (m) 3.048 E-01

inch (in.) meter (m) 2.540 E-02

kilometer (km) meter (m) 1.000 E+03

mile (mi.) meter (m) 1.609344 E+03

AREA

To Convert From To Multiply By

circular mil (cmil) square meter 5.067075 E-10

square centimeter square meter 1.000 E-04

square foot square meter 9.290304 E-02

square kilometer square meter 1.000 E+06

square mile square meter 2.589988 E+06

FORCE

To Convert From To Multiply By

kilogram force (kgf) newton (N) 9.806650

kip newton (N) 4.448222 E+03

pound force (lbf) newton (N) 4.448222

MASS

To Convert From To Multiply By

pound (avoirdupois) (lb) kilogram (kg) 4.535924 E-01
APPENDIX 2

 DERIVIATION OF MAXIMUM PERMISSIBLE LINE ANGLES

FORMULA:

 Sin(O/2) = (P-(Fw*Sw*Ww))/2*Ft*T

 (From RUS Bulletin 160-2, Section III-12-F)

CONSTANTS:

 Wind Overload Capacity Factor (Fw): 2.00

 (NOTE: Use 2.67 at crossings)

 Wire Tension Overload Capacity Factor (Ft): 1.33

 (From 1997 NESC, TABLE 253-2, Grade C)

CONDUCTOR DATA:(From RUS Bulletin 160-2, Table B-1)

 Maximum Design

Conductor Size Strength Tension Tension (T)

4 ACSR (7/1) 2360 60% 1416

2 ACSR (6/1) 2850 60% 1710

2 ACSR (7/1) 3640 60% 2184

1/0 ACSR (6/1) 4380 60% 2628

123.3 AAC (7) 4460 60% 2676

2/0 ACSR (6/1) 5310 50% 2655

3/0 ACSR (6/1) 6620 50% 3310

4/0 ACSR (6/1) 8350 40% 3340

246.9 AAC (7) 8560 40% 3424

336.4 ACSR (18/1) 8680 40% 3472

336.4 ACSR (26/7) 14100 35% 4935

 WIND LOAD (Ww) by Loading District

LIGHT MEDIUM HEAVY

4 ACSR (7/1) 0.1928 0.2523 0.4190

2 ACSR (6/1) 0.2370 0.2720 0.4387

2 ACSR (7/1) 0.2438 0.2750 0.4417

1/0 ACSR (6/1) 0.2985 0.2993 0.4660

123.3 AAC (7) 0.2985 0.2993 0.4660

2/0 ACSR (6/1) 0.3353 0.3157 0.4823

3/0 ACSR (6/1) 0.3767 0.3340 0.5007

4/0 ACSR (6/1) 0.4223 0.3543 0.5210

246.9 AAC (7) 0.4223 0.3543 0.5210

336.4 ACSR (18/1) 0.5130 0.3947 0.5613

336.4 ACSR (26/7) 0.5408 0.4070 0.5737