Current Industrial Reports

U.S. Department of Commerce

Economics and Statistics Administration

Bureau of the Census

Switchgear, Switchboard Apparatus, Relays, and Industrial Controls - 1997

MA36A(97)-1

Issued September 17, 1998

Information about the scope of the survey, methodology, explanation of terms, and historical notes

for this survey may be found in the introduction of the 1996 Manufacturing Profiles, issued July 1998.

Obtaining reports: Current data are released electronically on Internet for all individual surveys as 

they become available. Use http://www.census.gov/econ/www/manumemu.html. Individual reports

can be accessed by choosing "Current Industrial Reports (CIR's)," clicking on "Report Number Index"; 

from the "Industrial Product by Numeric Index," choose the survey of interest. Follow the menu to view

the text (ASCII) file or PDF file or download the worksheet file (WK format) to your personal computer.

These data are also available through the U.S. Department of Commerce and STAT-USA Electronic

Bulletin Board by subscription. To access, dial 202-482-3870 and follow the prompts to register. Also,

you may call 202-482-1986 or 1-800-STAT-USA, for further information. The Internet address is:

stat-usa.gov/.

For mail or fax copies of the publication, contact the Manufacturing and Construction Division Information

Center, 301-457-4673.

Address inquiries concerning these data to U.S. Department of Commerce, Bureau of the Census,

Manufacturing and Construction Division, Washington, DC 20233, or call Tempie Whittington,

301-457-4800

Summary of Findings

During 1997, the total value of shipments of switchgear and switchboard apparatus was $6.7 billion, up 

4.8 percent from the 1996 value of $6.4 billion. The 1997 shipments include power circuit breakers valued

at $456.3 million, an increase of 10.6 percent from 1996; low voltage panelboards, valued at $2.2 billion,

an increase of 4.4 percent from 1996; fuses and fuse equipment, valued at $557.4 million, an increase of

6.7 percent from 1996; molded case circuit breakers, valued at $1.3 billion, an increase of 5.4 percent from

1996; duct, valued at $278.1 million, an increase of 9.3 percent from 1996; and switchgear valued at $1.9

billion, an increase of 2.3 percent from 1996. During 1997, the total value of shipments of relays and

industrial controls was $9.3 billion, up 2.2 percent from the 1996 value of $9.1 billion. The 1997 shipments

include general-purpose relays valued at $850.8 million, an increase of 8.2 percent from 1996; specific

purpose industrial controls, valued at $3.5 billion, an increase of 2.0 percent from 1996; general purpose

industrial controls, valued at $4.4 billion, an increase of 0.7 percent from 1996; and motor controller

accessories valued at $554.4 million an increase of 7.4 percent from 1996.
Table 1. Value of Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1992 to 1997

[Millions of dollars]

Product

code Product description 1997 1996 1995 1994 1993 1992

36132 Power circuit breakers....................................... 456.3 412.7 442.9 550.9 520.8 480.8

36133 Low-voltage panelboards................................ 2,186.7 2,093.3 2,025.4 1,750.8 1,687.1 1,531.1

36134 Fuses and fuse equipment................................... 557.4 522.2 500.1 382.1 319.9 412.8

36135 Molded case circuit breakers............................... 1,283.6 1,218.1 1,173.4 1,132.9 1,009.8 954.7

36136 Duct, 1,000 volts and under..................................... 278.1 254.5 238.5 227.9 200.1 189.1

36139 Switchgear (except ducts)........................................ 1,911.6 1,868.2 1,758.3 1,663.7 1,581.3 161.5

36251 Relays, general purpose......................................... 8508 786.6 808.1 804.0 750.6 781.5

36252 Specific purpose industrial controls................... 3,523.3 3,454.9 3,312.4 2,747.9 2,321.6 1,915.7

36253 General purpose industrial controls....................... 4,353.8 4,323.8 4,189.2 3,840.3 3,326.3 2,778.2

36254 Motor controller accessories and

 parts for industrial controls.................................... 5544 516.4 503.3 511.6 476.4 447.9
Continued 1

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

3613 -- Switchgear and switchboard apparatus........... (NA) (X) 6,673,723 (X) 6,368,948

36132 - Power circuit breakers, all voltages.................33 (X) 456,296 (X) 412,680

36132 16 Power circuit breakers (sold 

 separately) for use in metal-clad

 switchgear, oil and oilless, over 

 1,000 volts, (number of breakers)..................... 10 4,246 a/ 45,524 3,304 42,908

36132 17 Parts for power circuit breakers for 

 use in metal-clad switchgear 1/............... 5 (X) (D) (X) (D)

36132 21 Power circuit breakers, free 

 standing, oil and oilless, from

 15.5 kV through 800 kV and above, 

 (number of breakers)............................................ 8 4,426 165,061 3,238 147,652

36132 22 Parts for power circuit breakers, 

 free standing, oil and oilless, 

 from 15.5 kV through 800 kV and

 above 1/............................................................. 3 (X) 12,723 (X) 12,602

36132 26 Power circuit breakers (sold 

 separately) in individual

 enclosures and/or for use in low-

 voltage switchgear, 1,000 volts 

 and below, excluding molded case

 circuit breakers ) (number of 

 breakers) 2/..................................................... 9 (D) (D) (D) (D)

36132 27 Parts for power circuit breakers in

 individual enclosures and/or for

 use in low-voltage switchgear, 

 1,000 volts and below, excluding

 molded case circuit breakers) 2/...................... 5 (X) (D) (X) (D)

36132 31 All other power circuit breakers 

 (sold separately), oil and oilless,

 network protectors and automatic

 circuit reclosers 2/........................................................ 8 (X) 180,972 (X) 175,824

36132 32 Parts for all other power circuit

 breakers, oil and oilless, network

 protectors and automatic circuit

 reclosers...................................................................... 14 (X) 52,016 (X) r/ 33,694

36133 - Low voltage panelboards, distribution

 boards, and other switching and

 interrupting devices, 1,000 volts

 and below........................................................ 125 (X) 2,186,671 (X) 2,093,277

 Panelboards, including enclosing

 cabinets: 

36133 11 Fusible, including combination

 switch fuse..................................................... 43 (S) 154,516 (S) r/ 161,144

36133 12 Circuit breaker................................................ 53 1,193,896 551,937 1,057,960 483,427

 Distribution switchboards: 

36133 15 Fusible.............................................................. 32 34,582 108,510 r/ 36,072 r/ 112,747

36133 17 Circuit breaker................................................ 45 84,539 343,635 r/ 78,091 323,222

36133 19 Other, including theater

 switchboards.................................................. 7 4,923 5,208 r/ 3,643 r/ 4,015

 Switches (except switches commonly 

 known as snap, toggle, and rotary

 switches and switch devices 

 intended primarily to be used with
Continued 2

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 electric motor controls): 

 Knife switches, enclosed:

36133 21 Heavy duty........................................................ 10 1,546,205 181,742 1,794,738 170,864

36133 22 General duty.................................................. 6 1,382,275 68,621 1,567,589 69,328

36133 24 Enclosed fusible, service

 entrance, and branch circuit 

 cutouts............................................................ 8 474,260 28,567 930,081 25,038

36133 26 Circuit breaker type.................................... 15 (S) 262,467 (S) 270,810

 Load centers:

36133 32 Grouped metering panels 

 (combinations of two or more

 meters and related switching 

 units with overcurrent

 protection associated with each

 meter, including accessory 

 components, excluding single

 socket load combinations)...................14 (S) a/ 35,089 (S) 39,878

36133 33 Other switches, excluding snap, 

 bolted, toggle, push, etc.,

 including open knife switches,

 motor contact, motor 

 disconnect, meter service 

 equipment other than

 metermounting, and test 

 devices......................................................... 22 (X) a/ 163,461 (X) 160,986

36133 98 Other low voltage switchgear

 apparatus......................................................................... 30 (X) a/ 282,918 (X) 271,818

36134 - Fuses and fuse equipment, under 2,300 

 volts (except power distribution

 cutouts) ............................................................................ 24 (X) b/ 557,363 (X) 522,201

36134 31 Nonrenewable plug fuses 3/................................ 3 (X) (D) (X) (D)

36134 51 Nonrenewable cartridge fuses................... 10 (X) b/ 261,953 (X) 254,408

36134 71 Renewable plug and cartridge fuses, 

 including renewable links 3/.................................. 3 (X) b/ 4,382 (X) 5,605

36134 93 Other fuses and open fuse material, 

 including cutouts, clips, bases,

 etc. ................................................................................... 22 (X) b/ 291,028 (X) 262,188

36135 - Molded case circuit breakers, 1,000

 volts and under............................................................... 33 (D) 1,283,649 (D) 1,218,119

 Industrial type, assembled as 

 complete units in supporting and

 enclosing housing of insulating 

 materials, with or without 

 accessories or attachments: 

36135 14 With ground fault detection

 capability........................................................................ 15 a/ 75,496 29,291 71,642 r/ 27,391

36135 16 Without ground fault detection

 capability....................................................... 17 31,578,925 680,198 27,808,120 606,674

 Residential or light duty type,

 (primarily) for load center

 application, assembled as complete 

 units in supporting and enclosing

 housing of insulating materials: 

36135 18 With ground fault detection
Continued 3

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 capability 4/........................................................... 7 (D) (D) (D) (D)

36135 19 Without ground fault detection

 capability 4/.............................................................. 6 48,710,661 269,478 51,980,001 288,322

36135 31 Individually enclosed industrial 

 type, excluding panelboards and

 busway plugs............................................................ 13 (S) 16,187 (S) 15,747

 Other molded case circuit breakers:

36135 91 Marine and Navy type 5/............................4 (D) (D) (D) (D)

36135 92 Aircraft and aerospace 5/................................... 6 1,417,854 127,551 1,293,889 119,165

36135 93 Automotive 6/................................................... 2 (D) (D) (D) (D)

36135 94 Electronic 6/................................................................. 5 (D) (D) (D) (D)

36135 95 All other types 6/............................................................ 12 66,548,291 160,944 59,535,988 r/ 160,820

36136 - Duct, including plug-in units and 

 accessories, 1,000 volts and under, 

 consisting of enclosed sectionalized

 prefabricated bus bars rated 20 

 amperes or more and associated 

 structures and fittings........................................... 22 2,148,413 278,147 1,484,533 254,475

36136 11 Busways 7/..................................................................... 20 (D) (D) (D) (D)

36136 31 Trolly-type and lighting 

 distribution duct 7/........................................................ 3 2,148,413 278,147 1,484,533 254,475

36139 - Switchgear (except ducts)...................................... 129 (X) 1,911,597 (X) 1,868,196

36139 07 Automatic and manual control panels 

 (generators,transformers, feed-

 controls, etc.)............................................................ 68 (X) 307,356 (X) 301,801

36139 09 Metal-clad switchgear (using power

 circuit breakers, oil and oilless),

 all voltages above 1,000 volts, up 

 to and including 38 Kv, excluding 

 load interrupter switchgear........................43 (X) a/ 355,286 (X) r/ 348,774

36139 10 Metal-enclosed load interrupter 

 switchgear assemblies, all 

 voltages, including parts............................37 (X) 183,797 (X) r/ 201,949

36139 13 Metal-enclosed low-voltage power

 circuit breaker switchgear

 assemblies 1,000 volts and below, 

 including parts and excluding load

 interrupter switchgear.................................33 (X) a/ 147,196 (X) 165,116

36139 17 Metal-enclosed bus bars when sold 

 separately, above 1,000 volts, 

 including isolated, segregated, 

 nonsegregated and cable bus bars...... 18 (X) a/ 45,670 (X) r/ 39,191

 Power switching equipment, 2,300 

 volts and over, including 

 attachments, auxiliaries, bus

 supports and fittings, and 

 accessories, but excluding power

 fuses sold separately.(Also 

 includes single phase circuit 

 reclosers:

36139 41 Outdoor, excluding structures................. 28 (X) 372,826 (X) 337,931

36139 45 Indoor................................................................. 9 (X) 7,091 (X) 3,434

36139 51 Power fuses and fuse links for 

 2,300 volts and over, ac 
Continued 4

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 service,excluding distribution 

 cut-outs 8/................................................................. 11 (X) (D) (X) (D)

36139 81 Power and ground connectors

 generally used in substation

 construction 8/........................................................ 6 (X) 158,741 (X) 143,179

36139 91 Overhead transmission and

 distribution connectors (clamps, 

 taps, terminals, and splices).............................. 6 (X) 45,946 (X) 41,729

36139 93 Transmission and distribution

 connectors, n.e.c., including 

 underground deadends, hot line 

 taps, stirrups, repair sleeves, 

 etc. 9/........................................................................... 4 (X) (D) (X) (D)

36139 83 Distribution cutouts........................................9 (X) 83,208 (X) 84,888

36139 98 Other switchgear devices, including 

 regulators and miscellaneous

 switchboard devices (for sale 

 separately) 9/.............................................................. 24 (X) a/ 204,480 (X) 200,204

3625 -- Relays and industrial controls................................... (NA) (X) 9,282,244 (X) 9,081,688

36251 - General purpose and other relays........................... 116 (X) 850,771 (X) 786,615

36251 01 Industrial control relays (all

 voltages), n.e.c. .............................................................. 42 (S) a/ 247,979 (S) r/ 229,950

 General purpose electromechanical

 relays: 

 Over 100 MW actuating power and 

 sealed (either hermetically or

 environmentally): 

36251 03 0 through 2.0 amps contact

 rating 10/.................................................... 8 (D) (D) (D) (D)

36251 04 Over 2.0 through 10.0 amps 

 contact rating............................................. 16 967,769 22,963 r/ 921,178 24,219

36251 05 Over 10.0 amps contact 

 rating 10/....................................................... 6 1,505,079 25,440 (S) 36,690

 Over 100 MW actuating power and

 not sealed:

36251 02 0 through 10.0 amps contact

 rating............................................................. 14 a/ 955,637 a/ 9,376 1,339,791 13,750

36251 10 Over 10.0 amps contact 

 rating 11/...................................................... 12 (D) (D) (D) (D)

36251 11 0 through 100 MW actuating power

 (both sealed and not sealed 11/..............2 a/ 859,216 9,842 1,250,927 10,082

 Miniature printed circuit mounted

 electromechanical relays,

 excluding reed relays (profile

 height 1/2 inch max.): 

 Sealed (either hermetically or

 environmentally):

36251 12 0 through 2.0 amps contact

 rating 12/..................................................... 4 (D) (D) (D) (D)

36251 15 Over 2.0 amps contact

 rating 12/.................................................... 3 11,115,959 13,276 10,235,539 12,305

36251 20 Not sealed................................................... 4 (D) (D) (D) (D)

 DIP or SIP footprint

36251 19 Sealed (either hermetically or
Continued 5

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 environmentally)........................................... 2 (D) (D) (D) (D)

 Telephone relays, all types: 

36251 22 Sealed (either hermetically or

 environmentally) 13/................................... 4 (D) (D) (D) (D)

36251 23 Not sealed 13/................................................. 4 c/ 12,844,017 c/ 14,205 6,722,880 7,497

36251 30 General purpose solid-state relays,

 pure solid-state and hybrid solid-

 state, excluding time delay.......................... 10 (D) (D) (D) (D)

 High performance military/aero-

 space/aircraft relays and contactors

 generally pertaining to Mil-R5757, 

 6106, 19523, 25108, and 39016):

36251 31 Round and square can multipole

 airframe relays and contractors

 (both sealed and not sealed)

 (all sizes)......................................................... 5 (D) (D) (D) (D)

 Crystal can types (sealed):

36251 32 Larger than full size..................................... 5 (S) 25,317 344,030 21,539

36251 33 Full size............................................................ 5 184,164 12,564 174,140 12,522

36251 37 Half size and smaller, including

 TO-5 package 14/.................................... 4 (D) (D) (D) (D)

36251 52 RF, antenna and coaxial relays 

 (sealed and not sealed), 

 excluding reed relays 14/........................... 7 a/ 1,820,947 89,325 r/ 1,744,353 r/ 69,762

 Reed relays: 

 Dry reed:

36251 59 Miniature size (glass length

 less than .85 inches) 15/.......................... 10 (D) (D) (D) (D)

36251 61 Standard size 15/........................................... 7 21,888,345 42,432 17,758,964 34,801

36251 66 Mercury wetted reed 16/..........................6 (D) (D) (D) (D)

36251 69 Stepping switches, stepping and

 impulse relays 16/.......................................... 4 (D) (D) (D) (D)

36251 75 Switchgear and protective 

 relays 16/............................................................. 6 627,338 25,731 572,202 19,818

 Timing relays (timers):

36251 79 Solid-state/EMR combination................24 b/ 1,199,009 b/ 36,050 930,410 25,936

36251 81 Solid-state-pure.......................................... 18 322,272 14,750 250,357 11,050

36251 82 All other timing relays (timers),

 including pneumatic, motor 

 driven, electronic, etc. ............................... 15 450,148 18,829 432,999 17,517

36251 92 All other general purpose and

 special purpose relays, n.e.c. ............................ 25 (X) 169,208 (X) 160,865

36251 96 Parts for general-purpose and 

 special-purpose relays (sold

 separately).......................................................... 9 (X) b/ 16,796 (X) 28,308

36252 - Specific-purpose industrial controls................... 250 (X) 3,523,286 (X) 3,454,885

36252 45 U.S. Coast Guard, Navy, and Marine

 auxiliary controls and accessories................ 24 62,807 137,411 75,612 130,539

36252 47 Metal mill controls and accessories

 (all voltages)...................................................... 8 (D) (D) (D) (D)

36252 48 Crane and hoist controls, constant 

 and adjustable voltage, including

 operators' desks and stations........................... 19 36,392 131,630 44,595 127,078

36252 49 Definite purpose contactors and 
Continued 6

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 starters (600 volts and less).......................... 19 10,789,899 135,262 11,797,777 r/ 160,097

 Machine tool applications (motion

 controllers): 

 Stand-alone controls for 

 numerically controlled machine

 tools:

36252 51 Computer numerical controls

 (CNC); postioning 

 (point-to-point)............................................. 12 9,523 23,097 9,449 22,262

36252 55 Computer numerical controls

 (CNC); continuous path

 (Contouring).................................................. 13 46,732 288,923 35,570 277,992

36252 57 Robotic controls.......................................... 4 (D) (D) (D) (D)

36252 58 Other stand-alone motion 

 controls ........................................................ 13 51,307 92,696 r/ 70,973 r/ 91,891

36252 60 Subordinate motion controls ...................12 (S) a/ 15,156 (S) r/ 15,471

36252 71 Programmable controllers, sold

 separately....................................................... 56 (S) 1,223,469 (S) r/ 1,133,627

36252 76 Other specific-or special-purpose

 ac and dc controllers, other 

 definite purpose devices.............................. 157 (X) a/ 1,365,793 (X) 1,377,299

36253 - General purpose industrial controls 

 and power circuit devices................................... 262 (X) 4,353,770 (X) 4,323,798

 General purpose controls: 

36253 01 AC full voltage non-combination

 magnetic starters (1,000 volts

 or less) ..................................................................... 24 b/ 968,714 155,910 1,153,398 154,856

 AC full voltage combination

 magnetic starters (1,000 volts

 or less):

36253 03 Combination starters, (less

 pumping panels) .................................................. 22 106,068 67,983 r/ 129,062 73,427

36253 05 Pumping panels ................................................ 19 62,505 36,411 38,991 29,572

36253 06 Disconnect switches (600 volts

 or less).................................................................... 19 2,519,221 55,758 1,977,834 56,476

 AC full voltage manual 

 controllers, 1,000 volts or

 or less: 

36253 23 Designed and rated to U. S.

 National Standards (NEMA).......................... 12 1,285,192 48,515 r/ 1,290,669 48,886

36253 25 Designed and rated to 

 International Standards (IEC) ....................... 7 (S) 722 (S) r/ 769

 AC contactors, 1,000 volts or 

 less, excluding controls for

 packaged adjustable speed drives 

 and synchronous motor control:

36253 27 Designed and rated to U. S. 

 National Standards (NEMA)................................ 14 577,622 82,837 r/ 483,249 68,231

36253 29 Designed and rated to 

 International Standards (IEC)........................ 16 (D) (D) (D) (D)

36253 14 AC reduced voltage controls, 1,000 

 volts or less, excluding 

 synchronous motor starters................................... 21 a/ 89,112 a/ 63,267 77,689 59,024

36253 15 Synchronous motor starters, 1,000 
Continued 7

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 volts or less, including both 

 full and reduced voltage........................................ 4 (D) (D) (D) (D)

36253 16 Motor control centers, 1,000 

 volts or less.............................................................. 38 (X) 437,495 (X) 422,834

36253 18 Starters and contactors for 

 squirrel cage and wound rotor and

 synchronous and non-synchrous

 motors, over 1,000 to 7,200

 volts, air break, vacuum, and

 oil immersed............................................................... 8 43,844 77,887 70,354 85,605

36253 21 Brakes and clutches................................................... 20 1,474,894 70,047 1,138,134 66,827

36253 34 Digital readout systems,

 including dial or plugboard type............................ 22 7,823 a/ 4,677 7,868 r/ 8,592

 Presence sensors and motion 

 measurement devices: 

 Limit switches (positioning

 sensors):

36253 32 Electromechanical positioning 

 sensors........................................................................ 30 (X) 135,698 (X) r/ 129,496

36253 33 Movement sensors.................................................... 19 (X) 37,892 (X) 35,815

 Solid-state positioning sensors: 

36253 35 Non-optical proximity sensors................. 18 (X) 90,302 (X) 80,040

36253 36 Optical proximity sensors..........................15 (X) 154,285 (X) 132,925

36253 37 All other pilot circuit devices, 

 excluding relays and limit

 switches............................................................... 12 (X) c/ 15,780 (X) 26,619

36253 38 DC power circuit devices (all 

 voltages).............................................................. 12 (X) b/ 28,235 (X) r/ 26,219

36253 39 Other control sensors (all 

 voltages)............................................................... 18 (X) 104,253 (X) r/ 109,955

 Pushbuttons and pushbutton stations,

 excluding operators' desks

 and stations: 

36253 42 Pushbuttons, 18 mm and smaller....................... 14 (X) 7,581 (X) r/ 8,536

36253 46 Pushbuttons, 19 mm to 29 mm.................................. 19 (X) 62,319 (X) 49,178

36253 48 Pushbuttons, 30 mm and larger................................. 24 (X) 211,561 (X) r/ 208,659

36253 81 Rheostats and resistors (except for 

 electronic applications) sold

 separately, n.e.c. ....................................................... 14 (X) 24,215 (X) 22,001

 Controls for adjustable speed 

 drives, including electronic and

 nonelectric and operators' desks 

 and stations: 

36253 83 Controls for AC packaged drives........ 37 570,415 376,332 549,023 r/ 436,571

36253 84 Controls for DC packaged drives........ 29 218,226 104,740 265,329 r/ 120,114

36253 85 AC drives systems........................................ 35 b/ 70,616 a/ 197,712 68,502 239,709

36253 86 DC drives systems........................................ 26 359,694 a/ 111,465 396,683 154,594

36253 98 Solid-state motor controllers 

 (all voltages)................................................. 48 1,715,242 252,950 r/ 1,839,990 r/ 231,740

36253 99 All other general industry 

 devices and systems............................................... 102 (X) 1,287,178 (X) r/ 1,184,817

36254 - Motor controller accessories and parts 

 for industrial controls....................................132 (X) 554,417 (X) 516,390

36254 91 Motor controller accessories, 
Continued 8

Table 2. Shipments of Switchgear, Switchboard Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Quantity in number of units. Value in thousands of dollars] 

No. 1997 1996

Product Product description of.

 code cos. Quantity Value Quantity Value

 including those items which are 

 sold separately, but become part of 

 a motor controller. Includes 

 overload relays, auxiliary 

 contacts, heater elements, 

 mechanical interlocks, control 

 transformers, kits to add push 

 buttons, selector switches, pilot

 lights, separate controller 

 enclosure fittings, reset 

 mechanisms, etc., excluding motor 

 circuit switches sold, separately.......................... 43 (X) 184,010 (X) r/ 164,154

36254 97 Parts for industrial controls................................. 107 (X) 370,407 (X) 352,236

 D Withheld to avoid disclosing data for individual companies. NA Not available. n.e.c. Not elsewhere

classified. r/Revised by 5 percent or more from previously published data. S Does not meet publication

standards. X Not applicable.

 1/Product code 36132 17 is combined with product code 36132 22 to avoid disclosing data for individual companies.

 2/Product codes 36132 26 and 36132 27 are combined with product code 36132 31 to avoid disclosing data for 

individual companies.

 3/Product code 36134 31 is combined with product code 36134 71 to avoid disclosing data for individual companies.

 4/Product code 36135 18 is combined with product code 36135 19 to avoid disclosing data for individual companies.

 5/Product code 36135 91 is combined with product code 36135 92 to avoid disclosing data for individual companies.

 6/Product codes 36135 93 and 36135 94 are combined with product code 36135 95 to avoid disclosing data for

individual companies.

 7/Product code 36136 11 is combined with product code 36136 31 to avoid disclosing data for individual companies.

 8/Product code 36139 51 is combined with product code 36139 81 to avoid disclosing data for individual companies.

 9/Product code 36139 93 is combined with product code 36139 98 to avoid disclosing data for individual companies.

 10/Product code 36251 03 is combined with product code 36251 05 to avoid disclosing data for individual companies.

 11/Product code 36251 10 is combined with product code 36251 11 to avoid disclosing data for individual companies.

 12/Product code 36251 12 is combined with product code 36251 15 to avoid disclosing data for individual companies.

 13/Product code 36251 22 is combined with product code 36251 23 to avoid disclosing data for individual companies.

 14/Product code 36251 37 is combined with product code 36251 52 to avoid disclosing data for individual companies. 

 15/Product code 36251 59 is combined with product code 36251 61 to avoid disclosing data for individual companies.

 16/Product codes 36251 66 and 36251 69 are combined with product code 36251 75 to avoid disclosing data for 

individual companies.

 Note: The percent of estimation of each item is indicated as follows: a/10 to 25 percent of this item is 

estimated. b/25 to 50 percent of this item is estimated. c/Over 50 percent of this item is estimated.
Table 3. Shipments, Exports, Imports, and Apparent Consumption of Switchgear, Switchboard 

 Apparatus, Relays, and Industrial Controls: 1997 and 1996

[Value in thousands of dollars] Exports of

Manufacturers' domestic

shipments merchandise Imports 

Product Product description (value f.o.b. (value at for concode plant) port) 1/ sumption 2/

1997

36132 16, 21 Power circuit breakers....................................................................................... 388,957 128,324 84546

 26, 31

36132 17, 22 Parts for power circuit breakers...................................................................... 67,339 180,587 48086

 27, 32

36133 11, 12 Low voltage panelboards and distribution boards ................................... 1,163,806 117,953 275,231

 15, 17, 19

36133 21, 22 Knife switches......................................................................................................... 250,363 3,587 9,137

36134 00 Fuses and fuse equipment, under 2,300 volts .............................................. 557,363 162,174 94,889

36135 00 Molded case circuit breakers, 1,000 volts and under .............................. 1,283,649 123,817 298484

36136 00 Duct, including plug-in units and accessories .........................................278,147 50,749 6,404

36139 07, 09 Switchgear and switchgear assemblies 3/............................................... (D) (D) (D)

 10, 13, 17, 41,

 45, 83, 98

36139 51 Power fuses and fuse links, 2,300 volts and over 3/............................... (D) (D) (D)

36139 81, 91 Power and ground connectors and transmission and

 93 distribution connectors 3/............................................................................... 1,911,597 285,980 122,723

36251 01, 03 Relays................................................................................................................................... 783,690 422,209 737,511

 04, 05, 02, 10,

 11, 12, 15, 20,

 30, 31, 32, 33,

 37, 52, 59, 61,

 66, 69, 75, 81,

 82, 92

36252 51, 55 Controls for numerically controlled machine tools .................................. 312,020 29,750 48,026

36252 71 Programmable controllers............................................................................ 1,223,469 136,206 328,126

36253 01, 03 Motor starters....................................................................................................... 260,304 43,336 46,462

 05, 15

36253 16 Motor control centers, 1,000 volts or less .......................................................... 437,495 68,618 38,850

36253 21 Brakes and clutches......................................................................................... 70,047 26,170 65,023

36253 32, 33 Limit switches....................................................................................................... 173,590 10,544 16,767

36253 81 Rheostats and resistors.................................................................................... 24,215 9,992 10,938

1996

36132 16, 21 Power circuit breakers........................................................................................ 365,094 125,667 75374

 26, 31

36132 17, 22 Parts for power circuit breakers...................................................................... 47,586 160,877 41936

 27, 32

36133 11, 12 Low voltage panelboards and distribution boards .............................. 1,084,555 126,683 211,789

 15, 17, 19

36133 21, 22 Knife switches..................................................................................................... 240,192 2,793 4,031

36134 00 Fuses and fuse equipment, under 2,300 volts .........................................522,201 131,419 82,636

36135 00 Molded case circuit breakers, 1,000 volts and under .......................... 1,218,119 92,281 251919

36136 00 Duct, including plug-in units and accessories ...................................... 254,475 39,007 9,823

36139 07, 09 Switchgear and switchgear assemblies 3/................................................. (D) (D) (D)

 10, 13, 17, 41,

 45, 83, 98

36139 51 Power fuses and fuse links, 2,300 volts and over 3/............................... (D) (D) (D)

36139 81, 91 Power and ground connectors and transmission and

 93 distribution connectors 3/.................................................................................. 1,868,196 270,272 123,049

36251 01, 03 Relays................................................................................................................................... 724,819 460,285 696,704

 04, 05, 02, 10,

 11, 12, 15, 20,

 30, 31, 32, 33,

 37, 52, 59, 61,

 66, 69, 75, 81,

 82, 92

36252 51, 55 Controls for numerically controlled machine tools ................................ 300,254 25,112 62,605

36252 71 Programmable controllers............................................................................... 1,133,627 116,090 273,939

36253 01, 03 Motor starters...................................................................................................... 257,855 37,851 49,707

 05, 15

36253 16 Motor control centers, 1,000 volts or less ...................................................... 422,834 53,197 30,640

36253 21 Brakes and clutches......................................................................................... 66,827 22,503 53,118

36253 32, 33 Limit switches....................................................................................................... 165,311 9,351 29,096

36253 81 Rheostats and resistors.................................................................................... 22,001 4,649 13,300

 D Withheld to avoid disclosing data for individual companies. 

 1/Source: U.S. Bureau of the Census report EM 545, U.S.Exports. 

 2/Source: U.S. Bureau of the Census report IM 145, U.S. Imports for Consumption.

 3/Data for "Switchgear and switchgear assemblies" and "Power fuses and fuse links" are combined with

"Power and ground connectors and transmission and distribution connectors" to avoid disclosing data for

individual companies.
Continued 1

Table 4. Comparison of Standard Industrial Classification-Based Product Codes with

 Schedue B Export Numbers, and HTSUSA Import Numbers: 1997

Product Export Import

code Product description number 1/ number 2/

36132 16, 21, Power circuit breakers ................................................................... 8535.21.0000 8535.21.0000

 26, 31 8535.29.0020 8535.29.0020

8535.29.0040 8535.29.0040

8536.20.0040 8536.20.0040

36132 17, 22, Parts for power circuit breakers ................................................. 853890.8020 8538.90.8020

 27, 32

36133 11, 12, Low voltage panelboards and 

 15, 17 distribution boards ....................................................................... 8537.10.9050 8537.10.9050

36133 21, 22 Knife switches .................................................................................. 8536.50.9045 8536.50.9045

36133 32, 98 Grouped metering panels, including 

 accessory components and other low 

 voltage switchgear appararus ................................................. 8537.10.9020 8537.10.9020

36134 00 Fuses and fuse equipment, under 2,300

 volts ................................................................................................... 8535.10.0040 8535.10.0040

8536.10.0020 8536.10.0020

8536.10.0040 8536.10.0040

36135 00 Molded case circuit breakers, 1,000

 volts and under ............................................................................... 8536.20.0020 8536.20.0020

36136 00 Duct, including plug-in units and 

 accessories ..................................................................................... 8536.90.8010 8536.90.8010

36139 07, 09, Switchgear, including switchgear

 10, 13, 41, assemblies and power switching

 45, 83, 98 equipment, excluding power fuses .......................................... 8537.20.0020 8537.20.0020

36139 51 Power fuses and fuse links, 2,300 

 volts and over .................................................................................. 8535.10.0020 8535.10.0020

36139 81, 91, Power and ground connectors; and 

 93 transmission and distribution 

 connectors, n.e.c. ......................................................................... 8535.90.8040 8535.90.8040

36251 01, 02, Relays ................................................................................................ 8536.41.0005 8536.41.0005

 03, 04, 05, 8536.41.0020 8536.41.0020

 10, 11, 12, 8536.41.0030 8536.41.0030

 15, 20, 30, 8536.41.0045 8536.41.0045

 31, 32, 33, 8536.41.0050 8536.41.0050
Continued 2

Table 4. Comparison of Standard Industrial Classification-Based Product Codes with

 Schedue B Export Numbers, and HTSUSA Import Numbers: 1997

Product Export Import

code Product description number 1/ number 2/

 37, 52, 59, 8536.41.0060 8536.41.0060

 61, 66, 69, 8536.49.0050 8536.49.0050

 75, 81, 82, 8536.49.0055 8536.49.0055

 92 8536.49.0065 8536.49.0065

8536.49.0075 8536.49.0075

8536.49.0080 8536.49.0080

36252 51, 55 Controls for numerically controlled

 machine tools ................................................................................. 8537.10.9030 8537.10.9030

36252 71 Programmable controllers .......................................................... 8537.10.9060 8537.10.9060

36253 01, 03, Motor starters ................................................................................... 8536.50.4000 8536.50.4000

 05, 15

36253 16 Motor control centers, 1,000 volts 

 or less ................................................................................................. 8537.10.6000 8537.10.6000

36253 21 Brakes and clutches ....................................................................... 8505.20.0000 8505.20.0000

36253 32, 33 Limit switches ....................................................................................... 8536.50.8055 8536.50.8055

36253 81 Rheostats and resistors ................................................................. 8533.40.0040 8533.40.8040

8533.40.8040

 1/Source: 1997 edition, Harmonized System-Based Schedule B, Statistical

Classification of Domestic and Foreign Commodities Exported from the United States. 

 2/Source: Harmonized Tariff Schedule of the United States, Annotated (1997).