| Business | Phone |
| Utility Electrical Supply Co 1118 Kno Pl, Rapid City 57701 | (605) 342-0085 |
| Border States Electric Supl Co 774 Industrial Ave, Rapid City 57702 | (605) 348-5104 |
| Chris Supply Co Inc 114 E Blvd N, Rapid City 57701 | (605) 342-5900 |
| Crescent Electric Supply Co 317 Maple Ave, Rapid City 57701 | (605) 342-7913 |
| Crum Electric Supply Co 1055 E Chicago St, Rapid City 57701 | (605) 342-8830 |
| Northern Power Technologies 712 Columbus St, Rapid City 57701 | (605) 342-2520 |