| Business | Phone |
| Abco Electric 14 N 1st Ave, Saint Charles 60174 | (630) 587-1660 |
| Andrew Electric 1438 S 6th St, Saint Charles 60174 | (630) 377-2639 |
| Unity Electric 3n345 12th St, Saint Charles 60174 | (630) 584-2249 |
| Fitzgerald Lighting & Mntnc 850 Meadowview Xing W, Saint Charles 60174 | (630) 876-5447 |
| Tecam Electric Inc 6n555 Randall Rd, Saint Charles 60175 | (630) 513-7141 |
| Cobra Construction 35w375 Maple Ln, Saint Charles 60174 | (630) 513-8996 |
| Rehm Electric Shop Inc 215 W Main St, Saint Charles 60174 | (630) 584-0009 |
| Electrical Design Systems 7n215 Sims Ln, Saint Charles 60175 | (630) 587-0400 |
| Mimar Electric 201 N Tyler Rd, Saint Charles 60174 | (630) 443-6967 |
| Mascal Electric Inc 209 S 3rd St, Saint Charles 60174 | (630) 377-8537 |
| High Voltage Electric 102 N 5th Ave, Saint Charles 60174 | (630) 584-3377 |
| Hochsprung Electric Ii 1830 Wallace Ave, Saint Charles 60174 | (630) 513-7759 |