| Business | Phone |
| Coulbourn Electric 100 Holly Ter, Cambridge 21613 | (410) 228-6419 |
| John W Tieder Inc 736 Woods Rd, Cambridge 21613 | (410) 228-5262 |
| Tomey Electric Inc 5430 Handley Rd, Cambridge 21613 | (410) 228-8130 |
| Traver's Electric 802 Peachblossom Ave, Cambridge 21613 | (410) 228-5871 |