**[16-1 Electrical Work]{.underline}**

**[1. SCOPE]{.underline}**

## 

## [1.1 Scope]{.underline}

This specification covers the ***minimum requirements*** for electrical
work at FAA facilities. Where the phrase \"unless otherwise indicated\"
or similar wording appears, it refers exclusively to other documents
that are specific parts of the contract. Where there are requirements
peculiar to specific FAA facility types, e.g., air route traffic control
centers (ARTCCs), metroplex control facilities (MCFs), terminal radar
control (TRACONs), etc., these requirements will be added following the
appropriate paragraph.

###### 

# [2. APPLICABLE DOCUMENTS]{.underline}

The current issues of the following documents in effect on the date of
the invitation-for-bids or request-for-proposals form a part of this
specification, and are applicable to the extent specified herein.

## 2.1 Federal specifications

  ----------------- -----------------------------------------------------
  J-C-30            Cable and Wire, Electrical (Power, Fixed
                    Installation)

  W-C-375           Circuit Breakers, Molded Case; Branch Circuit and
                    Service

  WW-C-566          Conduit, Metal, Flexible
  ----------------- -----------------------------------------------------

(To obtain copies of federal specifications, contact General Services
Administration offices in Washington DC, Atlanta, Boston, Chicago,
Dallas, Denver, Kansas City MO, Los Angeles, New York, San Francisco, or
Seattle.)

## [2.2 Steel Structures Painting Council standards]{.underline}

SSPC-PS 10.01 Hot-Applied Coal Tar Enamel Painting System

(Single copies of SSPC Standards can be obtained from the Steel
Structures Painting Council, 4400 Fifth Avenue, Pittsburgh, Pa 15213,
412/578-3327)

## [2.4 National Fire Protection Association (NFPA) publications]{.underline}

  --------------- -------------------------------------------------------
  NFPA 70         National Electrical Code (NEC)

  --------------- -------------------------------------------------------

(Requests for copies of NFPA publications should be addressed to the
National Fire Protection Association, Batterymarch Park, Quincy MA
02269.)

## [2.5 National Electrical Manufacturers Association (NEMA) standards]{.underline}

  --------------- -------------------------------------------------------
  OS-1            Sheet Steel Outlet Boxes, Device Boxes, covers and Box
                  Supports

  WC 5            Thermoplastic Insulated Wire and Cable for the
                  Transmission and Distribution of Electrical Energy

  WD 1            General Requirements for Wiring Devices
  --------------- -------------------------------------------------------

(For copies of NEMA standards, contact the National Electrical
Manufacturers Association, 2101 L Street N.W. Washington DC 20057,
202/457-8400.)

## [2.6 Underwriters\' Laboratories (UL) Inc. standards]{.underline}

+---------------+------------------------------------------------------+
| UL 5          | Surface Metal Raceways and Fittings                  |
+---------------+------------------------------------------------------+
| UL 6          | Rigid Metal Conduit                                  |
+---------------+------------------------------------------------------+
| UL 50         | Enclosures for Electrical Equipment                  |
+---------------+------------------------------------------------------+
| UL 486A       | Wire Connectors and Soldering Lugs                   |
|               |                                                      |
|               | for Use with Copper Conductors                       |
+---------------+------------------------------------------------------+
| UL 486C       | Splicing Wire Connectors                             |
+---------------+------------------------------------------------------+
| UL 486E       | Equipment Wiring Terminals for Use                   |
|               |                                                      |
|               | with Aluminum and/or Copper                          |
|               |                                                      |
|               | Conductors                                           |
+---------------+------------------------------------------------------+
| UL 514A       | Metallic Outlet Boxes                                |
+---------------+------------------------------------------------------+
| UL 514B       | Fittings for Conduit and Outlet                      |
|               |                                                      |
|               | Boxes                                                |
+---------------+------------------------------------------------------+
| UL 651        | Schedule 40 and 80 Rigid PVC                         |
+---------------+------------------------------------------------------+
| UL 797        | Electrical Metallic Tubing                           |
+---------------+------------------------------------------------------+
| UL 870        | Wireways, Auxiliary Gutters and                      |
|               |                                                      |
|               | Associated Fittings                                  |
+---------------+------------------------------------------------------+
| UL 1242       | Intermediate Metal Conduit                           |
+---------------+------------------------------------------------------+

(For copies of UL standards, contact Underwriters\' Laboratories Inc.,
Publication Department, 333 Pfingsten Rd., Northbrook IL 60062.)

## [2.7 Institute of Electrical and Electronics Engineers (IEEE) Inc. standards]{.underline}

  --------------- ---------------------------------------------------- --
  STD 141         Recommended Practice for Electric Power Distribution 
                  for Industrial Plants                                

  STD 519         Recommended Practices and Requirements for Harmonic  
                  Control and Electrical Power Systems                 

  STD 1100        Recommended Practice for Powering and Grounding      
                  Sensitive Electronic Equipment                       
  --------------- ---------------------------------------------------- --

(For copies of this standard, contact the IEEE Inc., Service Department,
445 Hoes Lane, PO Box 1331, Piscataway, NJ 08855-1331.)

## [2.8 Other documents]{.underline}

### 

### [2.8.1 Local utility companies]{.underline}

The rules and regulations of the local utility companies providing
service.

### 

### [2.8.2 Local governing bodies]{.underline}

The rules, regulations, and codes of local governing bodies.

# [3. MATERIALS]{.underline}

## [3.1 General]{.underline}

The contractor shall furnish all materials not specifically identified
as Government Furnished Materials in the invitation-for-bids or
contract. Materials and equipment shall comply with all requirements of
the contract documents. Materials furnished by the contractor shall be
new, the standard products of manufacturers regularly engaged in the
production of such materials, and of the manufacturer\'s latest designs
that comply with the specification requirements. If materials and
equipment requirements conflict, the order of precedence for selection
shall be as follows: special contract provision, the contract drawings,
this specification, and then continuing order of precedence, referenced
FAA documents, Military documents, Federal specifications, NFPA
publications, IEEE standards; UL standards and NEMA standards. Wherever
standards have been established by Underwriters\' Laboratories, Inc.,
the material shall bear the UL label.

# [4. INSTALLATION]{.underline}

[NOTE:]{.underline} Unscheduled interruptions of the electrical service
to FAA facilities may cause aircraft accidents and loss of life. Work
requiring a temporary or permanent deenergization of equipment shall be
scheduled in writing with the onsite FAA maintenance personnel. Only
onsite FAA maintenance personnel are authorized to energize, deenergize
equipment or to operate a circuit breaker, switch, or fuse in an FAA
facility. Work procedures shall include lock-out/tag-out procedures in
accordance with FAA Order 3900.49.

## [4.1 General]{.underline}

The rules, regulations and reference specifications enumerated herein
shall be considered as minimum requirements. FAA requirements often
exceed those of other standards organizations such as the NEC. Adherence
to other standards shall not relieve the contractor from furnishing and
installing higher grades of materials and workmanship when so required
by this specification. Adherence to this specification shall not relieve
the contractor from furnishing and installing higher grades of materials
and workmanship when so required by the contract drawings or special
contract provisions. This specification shall govern when conflicts
occur between it and the documents referenced in paragraph 2, Applicable
documents, and in the order of precedence established in paragraph 3,
Materials.

### [4.1.1 Short circuit analysis and protective device coordination (SCA/PDC)]{.underline}

The distribution system and all component parts, when installed or as
modified, shall be in accordance with IEEE Standard 519, Recommended
Practices and Requirements for Harmonic Control and Electrical Systems,
and shall include a short circuit analysis and protective device
coordination study in accordance with FAA Order 6950.27.

## [4.2 Workmanship]{.underline}

All materials and equipment shall be installed in accordance with the
contract drawings. When manufacturers recommended installation methods
conflict with contract requirements, differences shall be resolved by
the Contracting Officer. The installation shall be accomplished by
qualified workers regularly engaged in this type of work. Where required
by local regulations, the workers shall be properly licensed.

## [4.3 Contract drawings]{.underline}

Where the electrical drawings indicate (by diagram or otherwise) the
work intended and the functions to be performed, even though some
details are not shown, the contractor shall furnish all equipment,
material (other than the Government-furnished items, see paragraph 3.1)
and labor to complete the installation work and to accomplish all the
indicated functions of the electrical installation. Further, the
contractor shall be responsible for taking the necessary actions to
ensure that all electrical work is coordinated and compatible with
architectural, mechanical, and structural plans, and the layout of any
special electronic equipment.

### [4.3.1 Minor departures]{.underline}

Minor departures from exact dimensions shown on the electrical plans may
be permitted when required to avoid conflict or unnecessary difficulty
in placement of a dimensioned item, provided all contract requirements
are met. The contractor shall promptly obtain approval from the
Contracting Officer prior to undertaking any such departure and shall
provide appropriate documentation of the departure.

## **[4.4 Grounding]{.underline}**

### 

### [4.4.1 General]{.underline}

FAA grounding requirements often exceed those of the NEC. Grounding
systems shall be as indicated on the contract drawings and as specified
herein. Reference IEEE Standard 1100-1992, Recommended Practice for
Powering and Grounding Sensitive Electronic Equipment, when installing
all NAS equipment. In no case, however, shall the NEC be violated.

### **[4.4.5 Equipment grounding conductor]{.underline}**

#### 

#### [4.4.5.1 General]{.underline}

All metallic non-current carrying parts of electrical equipment shall be
grounded with equipment grounding conductors whether or not shown on the
drawings. Equipment grounding conductors shall always be green insulated
copper conductors unless otherwise indicated. Non-insulated equipment
grounding conductors are not allowed. When these conductors are not
sized, or shown on the contract drawings, they shall be sized in
accordance with Table 250-122, \"Minimum Size Equipment Grounding
Conductors for Grounding Raceway and Equipment\", of the NEC.

#### 

#### [4.4.5.2 Connections]{.underline}

There shall be no interconnection between equipment grounding conductors
and neutral conductors except at the main service and separately derived
sources. All connections to equipment to be grounded shall be made with
a grounding connector specifically intended for that purpose. Bare wire,
wrapped around mounting bolts and screws, is not acceptable as a
grounding connection. All ground lugs shall be of a noncorrosive
material suitable for use as a grounding connection, and must be
compatible with the type of metal being grounded. All mating surfaces
and connections shall be between cleaned bare metal to bare metal
surfaces.

#### 

#### [4.4.5.3 Installation]{.underline}

Each overcurrent device shall have

its own equipment grounding conductor, i.e., a single-pole single-phase
overcurrent device shall be supplied with an equipment grounding
conductor; a two -pole, single-phase overcurrent device shall be
supplied with its own equipment grounding conductor; a three-pole,
three-phase overcurrent device shall be supplied with its own equipment
grounding conductor. The equipment grounding conductor shall be
installed in the same conduit as its related branch and feeder
conductors and shall be connected to the ground bus in the branch or
distribution panelboard. Metal conduit housing the equipment grounding
conductor shall be electrically continuous, forming a parallel path to
the equipment grounding conductor, except as allowed by the NEC. Where
parallel feeders are installed in more than one raceway, a full sized
equipment grounding conductor shall be installed in each raceway.

### [4.4.6 Raceway grounding]{.underline}

Surface metal raceways, wireways, or cable rack systems shall be
installed in a manner that assures electrical continuity. Insulated
copper bonding jumpers shall be installed between adjacent raceway
sections to assure proper bonding. Uninsulated conductors shall not be
used. Unless otherwise indicated, the minimum size for these bonding
jumpers shall be No. 6 AWG. Where aluminum raceways are used, the
jumpers shall be bonded with approved connectors for the dissimilar
metals. All metallic raceway penetrations into a facility structure
shall be bonded to the earth electrode system in accordance with
FAA-STD-019.

### [4.4.7 Other grounding systems]{.underline}

Any additional grounding systems used for electronic equipment shall be
connected directly to the exterior earth electrode system or the
perimeter ground cable under a raised floor in an equipment room. Other
grounding systems shall not be used in place of the equipment grounding
conductor system. The conductor used for other grounding (i.e., NEC
250-74, exception #4) systems shall be color coded green with a yellow
stripe for single point isolated signal ground, green with an orange
stripe for multipoint signal ground, green with a red stripe for high
energy ground, green with a violet stripe for isolated equipment
grounding connections.

## **[4.6 Wiring methods]{.underline}**

### 

### [4.6.1 General]{.underline}

All wiring shall consist of insulated copper conductors installed in
metallic raceways, unless otherwise specified.

#### 

#### [4.6.1.1 Conductor routing]{.underline}

Panelboards, surge arresters, disconnect switches, etc., shall not be
used as raceway for conductor routing other than conductors that
originate or terminate in these enclosures. Isolated ground conductors
will be allowed to traverse these enclosures.

#### [4.6.1.2 Conductor separation]{.underline}

Power conductors shall be routed separately from all other conductor
types. This may be accomplished by routing power conductors and other
conductors in separate raceways, or by a metallic divider between the
power conductors and the other conductors in the same raceway.

### 

### [4.6.2 Neutral conductor]{.underline}

Shared/common neutrals shall not be permitted, i.e., each overcurrent
device shall have its\' own separate neutral conductor. Neutral
conductor sizes shall not be less than the respective feeder or phase
conductor sizes.

### 

### **[4.6.3 Raceway systems]{.underline}**

#### 

#### [4.6.3.1 General]{.underline}

Each run shall be complete, and shall be fished and swabbed before
conductors are installed. Ends of raceway systems not terminated in
boxes or cabinets shall be capped. Exposed raceways shall be installed
parallel to or at right angles with the lines of the structure. Crushed
or deformed raceways shall not be installed. A pull wire shall be
installed in all empty tubing and conduit systems in which wiring is to
be installed by others. The pull wire shall be No. 14 AWG zinc-coated
steel, or plastic with a minimum 200-pound tensile strength. Ten inches
of slack shall be left at each end of the pull wire. Sections of
raceways which pass through to damp, concealed, or underground locations
shall be of a type allowed for such locations by NEC Article 300-5, and
shall extend a minimum of 12 inches beyond the damp, concealed, or
underground area. Where raceway has to be cut in the field, it shall be
cut square and burrs and sharp edges removed. Where conduits penetrate
walls or floors separating the building interior from the exterior, they
shall be sealed to prevent moisture and rodent entry and to deter air
transfer. In addition, where conduits penetrate walls separating
individually controlled temperature or humidity controlled areas, they
shall be sealed to prevent air circulation. Sealing methods and sealants
shall be accordance with NEC Article 300-7. Openings around penetrations
through fire-resistant-rated walls, partitions, floors, or ceilings
shall be fire stopped using approved methods to maintain the fire
resistance rating.

#### 

#### [4.6.3.2 Conduit]{.underline}

Minimum conduit size shall be 3/4 inch unless otherwise specified.
Conduit for telephone and signal systems shall be allowed to be 1/2
inch. Where threads have to be cut on conduit, the threads shall have
the same effective length and shall have the same thread dimensions and
taper as specified for factory cut threads on conduit.

[NOTE:]{.underline}

For ARTCCs, MCFs, and Large TRACONs, rigid steel conduit (RSC)or
intermediate metal conduit (IMC) shall be used for all distribution
panel feeders, transformer feeders, motor control center feeders and
distribution switchboards. Electrical metallic tubing (EMT) maybe used
for communication, lighting and branch circuits.

##### 

##### [4.6.3.2.1 Zinc coated rigid steel conduit (RSC)]{.underline}

Zinc coated rigid steel conduit (RSC) shall conform to UL 6. RSC, may be
used in all locations and shall be used for all underground service
conductors. For installation below slab, on-grade, or underground, the
conduit shall conform to Steel Structures Painting Council Standard,
SSPC-PS 10.01, or shall be field wrapped with 0.01-inch thick pipe
wrapping plastic tape applied with 50% overlap. Fittings used
underground shall be protected by field wrapping as specified herein for
conduit. All fittings used with rigid steel conduit shall be the
threaded type, of the same material as the conduit. Where conduits enter
enclosures without threaded hubs, double locknuts (one on each side of
the enclosure wall) shall be used to securely bond the conduit to the
enclosure. In addition, a bushing shall be installed on the interior
threaded end of the conduit to protect conductor insulation.

##### 

##### [4.6.3.2.5 Rigid nonmetallic conduit]{.underline}

Rigid nonmetallic conduit shall be heavywall PVC conforming to UL 651.
Rigid nonmetallic conduit used to protect electrical power conductors
may only be used underground, or in concrete, or as a vertical riser to
6 inches above grade or floor surface for connection to metal conduit;
and only when required by the contract drawings or specific job
specifications. PVC fittings shall be used with PVC conduit and shall be
assembled in accordance with manufacturer\'s instructions. A PVC
threaded fitting with locknut and plastic bushing shall be used to
connect PVC conduit to boxes or cabinets without threaded hubs. Rigid
nonmetallic conduit may be used to protect lightning protection system
conductors and, in interior locations, to protect signal grounding
conductors.

##### [4.6.3.2.6 Flexible metal conduit]{.underline}

Flexible metal conduit shall conform to Federal Specification, WW-C-566.
Flexible metal conduit shall be used for terminal connections to motors
or motor driven equipment, and in lengths only up to 6 feet for other
applications permitted by the NEC. Liquid-tight flexible metal conduit
shall be used outdoors and in wet locations. All flexible metal conduit
shall be of a type where both the conduit and fittings are listed for
grounding. This last requirement shall not apply to factory assembled
equipment. In addition to the internal ground wire, flexible metal
conduits shall have a #6 bonding jumper installed on the outside length
of the conduit.

[NOTE:]{.underline} Flexible metal conduit may be used under raised
floor for branch circuits in lengths longer than 6 feet in computer room
locations that meet all the requirements of Article 645 of the NEC. All
fittings and junction boxes shall be liquid tight types under the raised
floor.

##### 

##### [4.6.3.2.7 Flexible nonmetallic conduit]{.underline}

Flexible nonmetallic conduit shall not be used.

#### 

### **[4.6.4 Raceway support systems]{.underline}**

###### 

#### [4.6.4.1 General]{.underline}

Raceways shall be securely supported at intervals specified in the NEC
Article 300-11, \"Securing and Supporting\", and fastened in place with
pipe straps, wall brackets, hangers, or ceiling trapezes. Fastenings
shall be by wood screws, nails or screw -type nails to wood; by toggle
bolts on hollow masonry units; by expansion-bolts on concrete or brick;
by machine screws, welded threaded studs, or spring tension clamps on
steel work. Nail type nylon anchors or threaded studs driven by a power
charge and provided with lock washers and nuts may be used in lieu of
expansion bolts, machine screws, or wood screws. Threaded C clamps with
retainers may be used. Raceways or pipe straps depth of more than 1-1/2
inch in reinforced concrete beams, or to a depth of more than 3/4 inch
in reinforced concrete joists, shall not cut the main reinforcing bars.
Holes not used shall be filled. In partitions of light steel
construction, sheet-metal screws may be used. Raceways shall not be
supported from sheet -metal roof decks. In suspended-ceiling
construction, raceways shall not be fastened to the suspended-ceiling
supports.

### **[4.6.5 Conductors]{.underline}**

#### [4.6.5.2 Insulated conductors]{.underline}

Unless otherwise indicated, insulated conductors shall be copper with
thermoplastic or thermosetting insulation, type THW, THWN, and XHHW for
general use, or type THHN for use in dry locations only, all insulated
for 600 volts in accordance with Federal Specification J-C-30. Unless
otherwise indicated, conductors No. 10 AWG and smaller shall be solid.
Conductors No. 8 AWG and larger shall be stranded. Minimum branch
circuit conductor size shall be No. 12 AWG. Stranded conductors may be
used with wire compression connectors or a pressure washer type lug;
lugs with screw only compression are not allowed. Minimum control wire
size shall be No. 14 AWG unless noted otherwise. Stranded conductors
smaller than 10 AWG is allowed in applications where vibration and
flexing may be encountered.

##### [4.6.5.2.2. Color coding]{.underline}

All feeder and branch circuits, including neutral conductors, shall be
identified at both ends of the conductor with panel and circuit number
indicated. This shall be accomplished using shrink embossed labels only.
The color coding shall be continuous throughout the facility on each
phase conductor to its point of utilization so that the conductor phase
connection is readily identifiable. Equipment grounding conductors shall
be color coded green. Conductors covered with green insulation with
yellow, orange, violet or red tracers shall be used for other grounding
systems. Neutral conductors shall be white insulated for 120/208/240
volt systems and gray insulated for 277/480 volt systems. For
conductors, No. 4 AWG and larger, where appropriate insulation color is
not available, color coded tape, half lapped for a minimum length of 3
inches shall be used. Switch leg conductors shall be violet insulated.
Green, white, and gray insulated conductors shall not be reidentified.
All conductor color codes including reidentified conductors shall be
visible at all junction boxes, pullboxes, panelboards, outlets,
switches, at access locations in closed raceways, every three (3) feet
in open raceways, under all raised floors and at all terminations. Phase
conductors shall be color coded as follows:

[Single Phase]{.underline}

  ------------------------ ---------------------- ------------------------
  [120 Volts]{.underline}                         [120/208/240
                                                  Volts]{.underline}

  Line 1 - Black                                  Line 1 - Black

                                                  Line 2 - Red

  Neutral - White                                 Neutral - White
  ------------------------ ---------------------- ------------------------

[Three Phase]{.underline}

  ----------------------- --------------------- -------------------------
  [120/208/240                                  [277/480
  Volts]{.underline}                            Volts]{.underline}

  Phase A -- Black                              Phase A - Brown

  Phase B -- Red                                Phase B - Orange

  Phase C -- Blue                               Phase C - Yellow

  Neutral - White                               Neutral - White/Gray
  ----------------------- --------------------- -------------------------

Color coding for conductors in control cables shall be in accordance
with NEMA Standard WC 5. DC power conductors. shall be color coded as
follows: positive conductor, red with brown tracer; negative conductor,
brown with red tracer; neutral conductors, if used, shall be white.

#### [4.6.5.3 Splices]{.underline}

Splices shall be made only at outlets, junction boxes or accessible
raceways. Splicing of ungrounded conductors in panelboards is not
permitted. Splices shall be made with solderless connectors conforming
to UL 486A, UL 486C, AND UL 486E. Insulated wire nuts may only be used
to splice conductors sized No. 10 AWG and smaller. Compression
connectors shall be used to splice conductors No. 8 AWG and larger. All
splices, including those made with insulated wire nuts, shall be
insulated with electrical tape or shrink tubing to a level equal to that
of the factory insulated conductors. All underground splicing shall be
accomplished in accordance with FAA -C-1391.

[NOTE:]{.underline}

Conductors in critical power systems shall not be spliced.

## [4.7 Boxes]{.underline}

Boxes shall be either the cast --metal threaded-hub type conforming to
UL 514A and UL514B, galvanized steel type conforming to UL 514A and UL
514B, or metal outlet boxes conforming to NEMA OS l. All enclosures
shall conform to NEMA standards.

### [4.7.1 Applications]{.underline}

Boxes shall be provided in the wiring or raceway system for pulling
wires, making connections, and mounting devices or fixtures. All outdoor
boxes shall be rated minimum NEMA 3R. In hazardous areas, boxes shall be
explosion proof. Each electrical outlet box shall have a machine screw
which fits into a tapped hole in the box for the ground connection.
Boxes shall be sized in accordance with the NEC Article 370. Boxes for
mounting lighting fixtures shall not be less than 4 inches square. Boxes
installed for concealed wiring shall be provided with extension rings or
plaster covers. The front edge of the box shall be flush or recessed not
more than 1/4-inch from the finished wall surface. Boxes for use in
masonry --block or tile walls shall be square-cornered tile-type, or
standard boxes having square-cornered tile-type covers. Cast-metal boxes
installed in wet locations a nd boxes installed flush with exterior
surfaces shall be gasketed. Separate boxes shall be provided for flush
or recessed fixtures where required by the fixture terminal operating
temperature, and fixtures shall be readily removable for access to the
boxes unless ceiling access panels are provided. Boxes for fixtures on
suspended ceilings shall be supported independently of the ceiling
supports. Boxes shall not be supported from sheet -metal roof decks.
Non-metallic boxes may be used only with non --metallic raceway systems.

### [4.7.2 Supports]{.underline}

Boxes and supports shall be securely fastened to wood with wood screws,
nails, screw -type nails, carriage bolts, or lag screws of equal holding
strength, with bolts and expansion shields on concrete or brick, with
toggle bolts on hollow masonry units, and with machine screws or welded
studs on steel work. Support systems shall be capable of carrying the
weight of the box and its contents. Threaded studs driven by powder
charge and provided with lockwashers and nuts, or nail -type nylon
anchors may be used in lieu of expansion shields, or machine screws. In
open overhead spaces, cast -metal boxes threaded to raceways need not be
separately supported except where used for fixture support; cast -metal
boxes having threadless connectors and sheet-metal boxes shall be
supported directly from the building structure or by bar hangers. Where
bar hangers are used, the bar shall be attached to raceways on opposite
sides of the box and the raceway shall be supported with an approved
fastener not more than 24 inches from the box. Penetration shall be no
more than 1-1/2 inches into reinforced concrete beams nor more than
3/4-inch into reinforced concrete joists. Main reinforcing steel shall
not be cut.

## [4.12 Safety switches]{.underline}

Safety switches shall be type \"HD,\" heavy duty, locking type unless
otherwise indicated. Switches mounted in dry locations shall be NEMA
type 1 enclosures. Switches installed outdoors, or in damp locations
shall be mounted in NEMA type 3R enclosures. Switches shall be of the
voltage and current ratings indicated on the drawings. Switches shall be
the quick-make, quick-break type. Except for ground lugs which shall be
bonded to the housing, all parts shall be mounted on insulating bases to
permit replacement of any part from the front of the switch. All current
-carrying parts shall be of high-conductivity copper unless otherwise
specified. Switch contacts shall be silver -tungsten or plated to
minimize corrosion, pitting and oxidation. When used for motors a safety
switch shall be sized in accordance with NEC Article 380. Switches shall
disconnect all ungrounded conductors.

## [4.17 Fuses]{.underline}

A complete set of fuses shall be installed and one set of spares shall
be furnished for each fusible device. Time and current tripping
characteristics of fuses serving motors or connected in series with
circuit breakers shall be determined by the facility Protective Device
Coordination Study (PDC). Fuses shall have a voltage rating not less
than the circuit voltage. Required fuse interrupting ratings, determined
by the Short Circuit Analysis (SCA) calculations, shall be as shown on
the drawings, except that these interrupting ratings shall not be less
than 100,000 amperes in branch and feeder circuits, and not less than
200,000 amperes in a service entrance switch.

## **[4.20 Painting and finishing]{.underline}**

Where factory finishes are not adequate to protect metal surfaces from
corrosion, the contractor shall paint exposed surfaces prior to or after
installation. All marred or damaged surfaces, except exposed metal for
grounding purposes, shall be refinished to leave a smooth, uniform
finish at final inspection.

## **[4.21 Repair of existing work]{.underline}**

Electrical work shall be carefully planned. Where cutting, channeling,
chasing, or drilling of floors, wall partitions, ceilings, or other
surfaces is necessary for the proper installation, support, or anchorage
of the conduit, raceways, or other electrical work, it shall be
carefully done. The contractor shall repair, with equal material by
skilled workers, any damage to facilities caused by the contractor\'s
workers or equipment. Contracting Officer\'s prior approval must be
obtained for the materials, workers, time of day or night, repair
method, and for temporary or permanent repairs purposes. On completion,
repair work shall be inspected and approved by the Contracting Officer
with the concurrence of any other affected parties such as utility
companies and airport authorities.

# [5. QUALITY ASSURANCE PROVISIONS]{.underline}

## [5.1 List of materials and equipment]{.underline}

When required by the contract the contractor shall submit a list of
materials and equipment to the Contracting Officer for approval.

### [5.1.1 Information required]{.underline}

This list shall include manufacturer\'s style or catalog numbers.
Partial lists submitted from time to time shall not be considered as
fulfilling this requirement. Approval of materials will be based on
manufacturer\'s published data. Approval of materials and equipment will
be tentative, subject to submission of complete shop drawings, when
required, indicating compliance with the contract documents.

### [5.1.2 Statement]{.underline}

A manufacturer\'s statement indicating complete compliance with the
applicable federal specification, military specification, or standards
of ASTM, NEMA, or other commercial standard, is acceptable as indicating
compliance with contract documents.

## [5.2 Shop drawings]{.underline}

When required by the contract or by direction of the contracting
officer, the contractor shall submit shop drawings for materials and
equipment not completely identified by information submitted in the
materials and equipment lists. This information shall include, but is
not limited to panelboards, lighting fixtures, cable trays, switchgear,
transformers, busways, cabinets, and lightning protection systems. In
addition, the contractor shall provide the completed Short Circuit
Analysis/Protective Device (SCA/PDC) study, FAA Order 6950.27.

### [5.2.1 Coordination]{.underline}

Drawings and submitted data shall be checked and coordinated with the
work of other construction trades involved, before they are submitted
for approval, and shall bear the contractor\'s stamp of approval as
evidence of such checking and coordination.

### [5.2.2 Required data]{.underline}

Drawings and submitted data shall be complete, assembled in sets and
shall bear the date, drawing revision number, name of project or
facility, name of contractor and subcontractor, and the clear identity
of contents and location of work.

### [5.2.3 Approval]{.underline}

The approval of drawings and submitted data shall not be construed as
(1) permitting any departure from the contract requirements; (2)
relieving the contractor of the responsibility for any errors, including
details, dimensions, materials, etc.; or (3) approving departures from
full size details furnished by the Contracting Officer.

### [5.2.4 Variations]{.underline}

If drawings show variations from the contract requirements because of
standard shop practice or for other reasons, the contractor shall
describe such variations in a letter of transmittal to the Contracting
Officer. If acceptable, the Contracting Officer may approve any or all
such variations, subject to a proper adjustment in the contract.
Contractors failing to describe such variations shall not be relieved of
the responsibility for executing the work in accordance with the
contract, even though such drawings have been approved.

### [5.2.5 Submission]{.underline}

The contractor shall submit and obtain approval of shop drawings by the
Contracting Officer before ordering materials or proceeding with any
work associated with the shop drawings.

## **[5.3 Tests]{.underline}**

### [5.3.1 General]{.underline}

Unless otherwise indicated, the contractor shall furnish all test
instruments, materials and labor necessary to perform the following
tests. All tests shall be performed in the presence of the Contracting
Officer or his designated representative. All instruments shall have
been calibrated within a period of two years preceding testing.
Calibrations shall be traceable to applicable industry recognized
standards.

### [5.3.2 Cables]{.underline}

All cables shall be tested in accordance with FAA Order 6950.22 prior to
installation and again upon completion of the installation. All testing
shall be accomplished before connection is made to any existing
equipment.

### [5.3.4 Insulation resistance tests]{.underline}

Feeder and branch circuit insulation tests shall be performed after
installation, but before connection to fixtures or appliances. Motors
shall be tested for grounds or short circuits after installation but
before start -up. All conductors shall test free from short circuits and
grounds, and have a minimum phase-to-phase and phase-to-ground
insulation resistance of 30 megohms when measured with a 500-volt DC
insulation resistance tester. Apply the test voltage for at least one
minute after the meter reading has stabilized. The contractor shall
submit a letter type test report to the Contracting Officer prior to
final FAA inspection of the contractor\'s work. The report shall list
the tests performed and results obtained.

### [5.3.5 Neutral isolation tests]{.underline}

For all new installations, the neutral in the service entrance switch
shall be tested for isolation from ground with an ohmmeter capable of
reading greater than 20,000 ohms. This procedure to be used is detailed
in the Appendix. This procedures can also be used to determine if there
are any other neutral --ground connections on the load side of the
service disconnecting means.

### [5.3.7 Operating test]{.underline}

After the interior wiring system installation is completed, and at such
time as the Contracting Offer may direct, the contractor shall conduct
an operating test for approval. The equipment shall be demonstrated to
operate in accordance with the requirements of this specification. The
test shall be performed in the presence of the Contracting Officer or
designated representative.

# [6. NOTES]{.underline}

## [6.1 General]{.underline}

This specification is to be used as part of the contract documentation
for construction and facility modification projects that do not require
major design efforts. No waivers to contractors, other than those
indicated as alternatives, are allowed. This specification is not to be
used as a design guide. For design information, consult FAA-STD-019,
Lightning Protection, Grounding, Bonding and Shielding Requirements for
Facilities; FAA-STD-020, Transient Protection, Grounding, Bonding and
Shielding Requirements for Equipment; FAA Order 6950.19, Practices and
Procedures for Lightning Protection, Grounding, Bonding, and Shielding
Implementation; FAA Order 6950.20, Fundamental Considerations for
Lightning Protection, Grounding, Bonding and Shielding and other
documentation as applicable.

## [6.2 Conflicts between documents]{.underline}

In all but the smallest of modification or construction contracts,
conflicts are unavoidable between the various documents cited in the
contract or referenced in an included specification. Any proposal
request using this document should contain the following provisions:
\"Prospective contractors shall, as part of their proposals, enumerate,
identify, and list conflicts that exist with the contract documents, and
between those documents and the rules, regulations, and codes of the
local utility company and local, county or state governing bodies.\"