- AC Dandy
- Acculite
- Ace
- Agastat
- Alcan
- Alcatel
- American Louvre
- Amphenol
- AMP
- Anamet
- Arrow-Hart
- Asco Electric

- Baumer Electric
- Belden
- Bel
- B-Line

- Cablerech
- Caddy/Erico
- Cadweld/Erico
- Caloritech
- Can arm
- Carlon
- Carol Cables
- Carte Transformers
- Coleman
- Columbia/MBF
- Commander
- Conduflor
- CRC
- Critchley
- Crompton Instruments
- Danbel/Design/Rab
- Delta
- Duracell
- DLT Cable
- Dual Lite
- Dwyer Instruments
- Duct-O-Wire

- Eastern
- Edison Fuses
- Edwards
- Electotek
- Electro Cables
- Elliptipar
- Energizer
- Essex
- Eurobex
- Eveready

- Federal Signal
- Finder
- Fisher Pierce
- Fostoria Industries
- General Cables
- General Electric
- GE Low Voltage
- GE Motors/Drives


- Hammond Power Solutions
- Hammond Manufacturing
- Heron Cable
- Honeywell
- Hubbell
- Hydel

- Ideal
- Ilsco
- Intermatic
- Indumart
- IPC Resistors

- J.V.C. Transformers
- Juno
- Killark
- Klein Tools


- Lennox
- Leviton
- Liebert
- Liteline
- Louisville Ladders
- Lumacell
- Lumec
- Lutron
- Luxo
- Marcus
- Micro Switch
- Moeller Electric
- Mohawk Cable
- Motorola
- Noma
- Nova Dryers
- Omega
- Optical Cable

- Paragon
- PDM
- Pioneer
- Pirelli
- Powerlite
- Provo
- Pyrotenax
- Pyromation
- Rawl
- Raychem
- Raytek
- Ready Lite
- Rex
- Russell
- S&C Electric
- SAF
- Sangamo
- Sasco
- Shat-R-Shield
- Sola
- Standard Products
- Startco
- Steinel
- Schmersal
- Superior/Essex

- Telemecanique
- Teco-Westinghouse
- Thomas Lighting
- 3M
- Tork
- Tyco Electronics


- Visioneering

- Wattstopper
- Westinghouse
- Wika Instruments
- Wieland
- Woodhead