| Business | Phone |
| Bigelow Electric 206 W Main St, Groton 1450 | (978) 448-0448 |
| Burnham Electric Inc 25 Hoyts Wharf Rd, Groton 1450 | (978) 448-6650 |
| O'Grady Electric 245 Forge Village Rd, Groton 1450 | (978) 448-6377 |
| Electrical Contracting & Svc 142 Main St, Groton 1450 | (978) 449-0001 |
| Macgregor Electric Groton 1450 | (978) 448-3876 |
| Kudla Electric Svc Inc 3 Summit, Groton 1450 | (978) 448-6062 |