| Business | Phone |
| A Lighting Electric Naperville 60540 | (630) 420-7822 |
| Ace Electric Inc Naperville 60563 | (630) 369-5303 |
| Advanced Electrical Svc 1567 N Aurora Rd 119, Naperville 60563 | (630) 585-9999 |
| Advantage One Electric Naperville 60540 | (630) 742-4709 |
| Automatic Control Svc 1528 Oswego Rd, Naperville 60540 | (630) 357-1780 |
| Gibson Electric Co Inc 2000 Calamos Ct, Naperville 60563 | (630) 527-8267 |
| Capitol Electric 1163 E Ogden Ave 705-, Naperville 60563 | (630) 964-8628 |
| Electronic Switching Systems 620 W 5th Ave, Naperville 60563 | (630) 420-8236 |
| Electric Utility Cost Group 710 E Ogden Ave, Naperville 60563 | (630) 369-0609 |
| Colonial Electrical Svc Inc 8s545 River Dr, Naperville 60565 | (630) 548-1663 |
| D & D Electric 1533 Fender Rd, Naperville 60565 | (630) 637-9114 |
| Continental Electrical Constr 1811 High Grove Ln 191, Naperville 60540 | (630) 355-4500 |
| Covington Electric 1730 Park St # 124, Naperville 60563 | (630) 848-1270 |