| Business | Phone |
| Ge Co 3530 W 12th St, Houston 77008 | (713) 864-4431 |
| Pantex 8760 Scranton St, Houston 77075 | (713) 941-9111 |
| Oem Inc 6401 W Sam Houston Pkwy N, Houston 77041 | (713) 680-9659 |
| Powell Control Ind 9917 Tanner Rd, Houston 77041 | (713) 460-8818 |
| Richardson Panel Mfg Inc 9619 Zaka Rd, Houston 77064 | (713) 466-8631 |
| Tesla Power 6510 Bourgeois Rd 100, Houston 77066 | (281) 444-1200 |
| Powell Electrical Mfg Co 8550 Mosley Rd, Houston 77075 | (713) 948-0824 |