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
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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    1531.1
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    1581.3     161.5
36251   Relays, general purpose................    850.8     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    2321.6    1915.7
36253   General purpose industrial controls....  4,353.8   4,323.8   4,189.2   3,840.3    3326.3    2778.2
36254   Motor controller accessories and
         parts for industrial controls.........    554.4     516.4     503.3     511.6     476.4     447.9


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
              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
                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
              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          24            (X)
              switchboard devices (for sale
              separately) 9/.....................                        a/ 204,480                     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
                  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/aerospace/
              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       10
                  less than .85 inches)15/.......                 (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          15
                driven, electronic, etc..........             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
              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
                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,
              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

   - Represents zero.
   D Withheld to avoid disclosing data for individual companies.
   NA Not avalilable.
   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 code 36132 26 are combined with product codes 36132 27 and 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 code 36135 93 is combined with product codes 36135 94 and 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 code 36251 66 is combined with product codes 36251 69 and 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
                       Product description                 shipments  merchandise      Imports
  Product                                              (value f.o.b.   (value at           for
    code                                                     plant)     port) 1/  consumption

              1997

36132 16, 21  Power circuit breakers.................       388,957      128,324        84,546
 26, 31
36132 17, 22  Parts for power circuit breakers.......        67,339      180,587        48,086
 27, 32
36133 11, 12  Low voltage panelboards and
 15, 17, 19    distribution boards...................     1,163,806      117,953       275,231
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       298,484
36136 00      Duct, including plug-in units and
               accessories...........................       278,147       50,749         6,404
36139 07, 09  Switchgear and switchgear
 10, 13, 17    assemblies 3/.........................           (D)          (D)           (D)
 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
 93            transmission and 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        75,374
 26, 31
36132 17, 22  Parts for power circuit breakers.......        47,586      160,877        41,936
 27, 32
36133 11, 12  Low voltage panelboards and
 15, 17, 19    distribution boards...................     1,084,555      126,683       211,789
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       251,919
36136 00      Duct, including plug-in units and
               accessories...........................       254,475       39,007         9,823
36139 07, 09  Switchgear and switchgear
 10, 13, 17    assemblies 3/.........................           (D)          (D)           (D)
 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
 93            transmission and 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.
   NA Not available.

   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.


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         8538.90.8020  8538.90.8020
 27, 32

36133 11, 12,  Low voltage panelboards and              8537.10.9050  8537.10.9050
 15, 17         distribution boards

36133 21, 22   Knife switches                           8536.50.9045  8536.50.9045

36133 32, 98   Grouped metering panels, including       8537.10.9020  8537.10.9020
                accessory components and other low
                voltage switchgear appararus

36134 00        Fuses and fuse equipment, under 2,300   8535.10.0040  8535.10.0040
                 volts                                  8536.10.0020  8536.10.0020
                                                        8536.10.0040  8536.10.0040

36135 00        Molded case circuit breakers, 1,000     8536.20.0020  8536.20.0020
                 volts and under

36136 00        Duct, including plug-in units and       8536.90.8010  8536.90.8010
                 accessories

36139 07, 09,   Switchgear, including switchgear        8537.20.0020  8537.20.0020
 10, 13, 41,     assemblies and power switching
 45, 83, 98      equipment, excluding power fuses

36139 51        Power fuses and fuse links, 2,300       8535.10.0020  8535.10.0020
                 volts and over

36139 81, 91,   Power and ground connectors; and        8535.90.8040  8535.90.8040
 93              transmission and distribution
                 connectors, n.e.c.

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
 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     8537.10.9030  8537.10.9030
                 machine tools

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      8537.10.6000  8537.10.6000
                 or less

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).
