| Business | Phone |
| Anchor Electric Corp 291 E Saint Charles Rd, Carol Stream 60188 | (630) 682-0145 |
| Ashley Electric 1047 Parkview Cir, Carol Stream 60188 | (630) 289-1715 |
| B & R Electric Inc 1082 Chetwood Dr, Carol Stream 60188 | (630) 830-5343 |
| Chicago Electric Co 490 Tower Blvd, Carol Stream 60188 | (630) 495-2900 |
| Computer Integrated Automation 280 Carlton Dr, Carol Stream 60188 | (630) 510-1480 |
| Cooper Electric & Construction Carol Stream 60188 | (630) 830-2544 |