Manufacturers
- Arnco
- AVO International
- Basler Electric
- Biddle
- Blackburn
- Delta
- Duratel
- Dynamic Ratings
- Elastimold
- Enersys
- Fisher Pierce
- Hi-Tech
- Homac Mfg. Company
- Joslyn-Clark Controls
- K-Line Insulations
- Lumasense
- Megger
- Metrosonics
- Meyer Steel Structures
- Mitsubishi Electric
- Multi-Amp
- On Line Monitoring
- Powell Electric
- Programma
- Scott Engineering
- Southwire
- Thomas & Betts
- Waukesha Electric