| Business | Phone |
| A M Rizzo Electrical Contr Durham Rd, Guilford 6437 | (203) 453-4156 |
| Adams Electric 94 Woods End Rd, Guilford 6437 | (203) 453-8396 |
| Apuzzo Security Electric Inc 224 Village Pond Rd, Guilford 6437 | (203) 458-3388 |
| C-White Electric 63 Maplecrest Dr, Guilford 6437 | (203) 457-0642 |
| Minuteman Electric Co 68 Spruce Hill Dr, Guilford 6437 | (203) 457-6908 |