Ballasts and transformers
Advance, Cutler-Hammer, Howard, Magnetek/Universal, Osram/Sylvania, Federal Pacific, Sola, Hammond

Batteries/ Signaling Devices
Edwards, Rayovac, Tork Alert

Breakers and Panels
Cutler-Hammer, Siemens

Boxes and Enclosures
Carlon, Cantex, Slater, Steel City, Walker, Hammond, Quazite, Austin, Synertech

Conduit
Allied Tube, Can-Tex, LTV, Carlon, National, J-M Manufacturing, Republic

Devices
Leviton, Pass and Seymour/Legrand, Selecta Switch, Daniel Woodhead, Novitas

Dimmers
Lightolier, Leviton, Lutron, Pass and Seymour

Electric Heat
Markel, Nutone, Electromode, Easy Heat

Emergency Lighting
Dual-Lite, Lightalarms, Surelites, Emergi-Lite, Hubbell, Compass

Fans
Fanimation, Craftmade, Minka Air, Nutone/Broan, Air King

Generators 
Cutler-Hammer, Siemens

Meter Sockets
Milbank, Siemans Power, Cutler-Hammer

Meter Centers
Cutler-Hammer, Siemens Power

Fasteners - Tape - Terminals
Buchanan, Blackburn, Burndy, Erico/Caddy, Ideal, Ilsco, Litchfield, Metallics, Scotch 3M, Ilsco, WW Cross

Fittings and Straps
Steel City/Kindorf, Eritech, Bridgeport, Gardner Bender, Conduit Pipe Products, Mulberry, Victor, Porcelain Products, Red-Dot/Mason, Threaded Rod, Arlington, T&B, OZ Gedney, American Fittings, Neer

Fixtures-Residential
American- Fluorescent, Arroyo Craftsman, Besa, Crystal, Classic, Designer Fountain, Dinico, Elk, Framburg, Fredrick Raymond, Forecast, Georgian Art, Hanover, Hadco, Halo, Hinkley, House of Troy, Hubbardton Forge, Juno, Justice, Kalco, Kenroy, Kichler, Lightolier, Light Concept, Maxim, Minka, Murray Feiss, Nutone, Norwell, Nulco, Progress, Quorum, Sea Gull, Schonbek, Thomas Ltg, Triarch, Illuminating-Experience, Scott Lamp, Tech Ltg, Troy, WAC Lighting,Wilshire

Fixtures Industrial/ Commercial
Abolite, A.L.P., American Electric, Alkco, Cooper, Columbia, Crouse-Hinds, Daybrite/Thomas, Gardco, Hadco, Metalux, Guth, Halo, Hubbell, K&H, Keene, Kim, Lexington Poles, Lightolier, Lite Control, Lumark, Lytepole, Manning, Marco, McGill, McGraw, Moldcast, NCI, N.L Corp, Pemco, Prescolite, Spaulding, Sterner, US Pole, Wide-Lite, HE Williams. RAB

Fuses
Edison Fusegear, Gould/Shawmut

Hand Dryers
Nova, American Dryer, Excel Dryer, World

Industrial Controls
Cutler-Hammer, Siemens Power, Westinghouse

Lamps
Osram/Sylvania, Philips, TCP, Venture, Westinghouse, Satco

Raceway/ Cable Tray
Walker Duct, Wiremold, Mono- Systems, Airey Thompson, Cablefil

Smoke Detectors
Kidde/Firex

Telephone Electronics
Leviton, P&S, G C Electronics, Wiremold

Timers/ Clocks, Photo Control
Intermatic, Precision, Tork

Tool/testers
Greenlee, 3M, Ideal, Amprobe, Klein, Gardner-Bender, Seatek, Fluke, Evtech, Velleman

Wire/Cable
AIW, Alliance, Alflex, Alcan, American Flex, American Metal, Bristol, Carol Cable, Cerro, Colonial, Essex, General Cable, Houston Wire & Cable, Republic, Royal, Steelflex, Triangle, Ford, United