Dates of Membership
| 1991 - |
E-J(New York City) Sachs (St. Louis) (Note:Sachs left in 2003 and rejoined in 2007) Cleveland Electric (Atlanta) |
| 1993 - |
Nathan Alterman (San Antonio) |
| 1998 - | ERMCO, Inc. (Indianapolis) |
| 2000 - |
Frischhertz Electric (New Orleans) |
| 2002 - | Mona Electric (Washington D.C.) |
| 2004 - |
Bruce & Merrilees (New Castle, PA - Near Pittsburgh) |
| 2010 - |
Sprig Electric (San Jose, CA) |
