| Business | Phone |
| George's Electric 59 Eramosa Cres, Guelph N1E 5Z5 | (519) 824-9561 |
| Greencor Electric Ltd 45 Dawson Rd, Guelph N1H 1B1 | (519) 822-0477 |
| Hesch Electric 80 Regal Rd #10, Guelph N1K 1C1 | (519) 823-1988 |
| Master Electric & Electronic 265 Edinburgh Rd S #B, Guelph N1G 2J6 | (519) 763-1183 |
| Jones Electric 9 Vancouver Dr, Guelph N1E 2E7 | (519) 823-8195 |
| Juno Electric 355 Elmira Rd N #110, Guelph N1K 1S5 | (519) 821-4890 |
| Knight Electrical Contractors 565 Massey Rd, Guelph N1K 1B3 | (519) 763-7038 |
| Klosak Machine Controls 93 Steffler Dr, Guelph N1G 3L5 | (519) 823-5830 |
| Kraner Electrical Ltd 111 Watson Rd N #4, Guelph N1E 6X7 | (519) 837-2048 |
| Kraner Electrical Ltd 16 Monticello Cres, Guelph N1G 2M2 | (519) 824-3566 |
| Nepton Electric Ltd 46 Queensdale Cres, Guelph N1H 6W3 | (519) 821-4585 |
| Regal Electric Rr 2 Stn Main, Guelph N1H 6H8 | (519) 763-7797 |
| Rise N Sons Electric Inc 12 Terry Blvd, Guelph N1E 1X5 | (519) 822-6144 |
| B W Nichol Electrical Ltd Rr 7 Stn Main, Guelph N1H 6J4 | (519) 837-3650 |
| S Jamrik Electric Ltd 321 Speedvale Ave E #303, Guelph N1E 1N4 | (519) 824-8192 |
| Seymour Electric 22 Deer View Ridge, Guelph N1H 6H9 | (519) 836-9810 |
| Spartan Electric Ltd 290 Southgate Dr, Guelph N1G 4P5 | (519) 836-6710 |
| United Electric 245 Speedvale Ave W, Guelph N1H 1C5 | (519) 836-2500 |
| Wellington Electric Ltd 10 Industrial St, Guelph N1E 6B8 | (519) 837-3524 |
| Wheeler Electric 97 Alice St, Guelph N1E 2Z7 | (519) 822-5544 |
| C M Devo Electric Inc 79 Regal Rd, Guelph N1K 1B6 | (519) 763-3131 |
| Carney Williams Electric 47 Carter's Rd, Guelph N1H 6H8 | (519) 763-5596 |
| City West Electric 17 Carolyn Crt, Guelph N1H 7N5 | (519) 822-8828 |
| Dave Ireland Electric 755 Hanlon Rd, Guelph N1G 2S6 | (519) 821-0594 |
| Delsan Electric 5 Elsley Crt, Guelph N1C 1C8 | (519) 836-9414 |