| Business | Phone |
| Advanced Electronics 180 Clarke St, Thunder Bay P7A 2L9 | (807) 344-3500 |
| Granite Electric Ltd 648 Squier St #17, Thunder Bay P7B 4A8 | (807) 346-0996 |
| Groom Electric 86 Klages Rd, Thunder Bay P7C 4V2 | (807) 475-6909 |
| Jonmar Limited 110 May St N, Thunder Bay P7C 3P1 | (807) 622-9650 |
| M J Fraser Electric Ltd Hazelwood Dr, Thunder Bay P7B 6B3 | (807) 768-9685 |
| Marvac Industrial Electric 648 Squier St #12, Thunder Bay P7B 4A8 | (807) 344-9811 |
| Mc Keown Electric 2240 Broadway Ave, Thunder Bay P7C 5N5 | (807) 939-1800 |
| North-West Electric 545 Central Ave, Thunder Bay P7B 5R5 | (807) 345-7475 |
| P A Grant Electric 439 Simon Fraser Dr, Thunder Bay P7C 4Z9 | (807) 577-6775 |
| Park Electric Svc 166 Powley St, Thunder Bay P7A 2K7 | (807) 344-1052 |
| Peterson Electric Co Ltd 142 Cumberland St N, Thunder Bay P7A 4M2 | (807) 344-2471 |
| Prezio Electric Ltd 731 Harold Cres, Thunder Bay P7C 5H8 | (807) 623-7229 |
| Rajala Electric Canada Ltd 3086 Oliver Rd, Thunder Bay P7B 6C2 | (807) 344-3282 |
| Reliable Electric 2203 Bordeaux Cres, Thunder Bay P7K 1C2 | (807) 473-4747 |
| Right-Way Power Corp 318 Wolseley St, Thunder Bay P7A 3H2 | (807) 345-3086 |
| Rnf Tech Systems 355 Rita St, Thunder Bay P7A 1H4 | (807) 628-6559 |
| Russo Electric 738 Bessie Ave, Thunder Bay P7E 1X3 | (807) 626-9661 |
| Superior North Electric Ltd Po Box 2802 Stn P, Thunder Bay P7B 5G3 | (807) 473-3525 |
| T R Kelly Electric 307 Euclid Ave #412, Thunder Bay P7E 6G6 | (807) 475-3536 |
| Venasky-Pouru Electric Ltd 926 Alloy Dr, Thunder Bay P7B 6A4 | (807) 623-0700 |
| White Pine Electric Ltd 1112 Russell St #2, Thunder Bay P7B 5N2 | (807) 345-6888 |
| White Park Electric Ltd 287 White Park Rd, Thunder Bay P7B 5E2 | (807) 768-1593 |
| Wildon Wiring 475 Eleventh Ave #B, Thunder Bay P7B 5R6 | (807) 344-0059 |
| Wildon Wiring 1460 Oliver Road, Thunder Bay P7G 1N6 | (807) 345-9785 |
| Ferguson Electric 895 Tungsten St #5, Thunder Bay P7B 6H2 | (807) 624-7312 |
| Commercial Electric Thunderbay 611 Squier St, Thunder Bay P7B 4A7 | (807) 344-8781 |
| Corbett Electric Po Box 26001 Rpo Westfort, Thunder Bay P7E 6R3 | (807) 473-7571 |
| Currie Electric Ltd 372 Elliott St, Thunder Bay P7A 1N2 | (807) 683-3931 |
| D R Mc Cormick Electric Ltd 938 Alloy Dr, Thunder Bay P7B 6A4 | (807) 623-4500 |
| Don R Thomas Electrical Contrs 357 Otto St, Thunder Bay P7A 2V4 | (807) 344-9944 |
| Energy Resources 1473 Rosslyn Rd, Thunder Bay P7E 6W1 | (807) 622-1113 |