| Business | Phone |
| A & B Electrical Contractors 114 Cedar Hill Ave, New Haven 6511 | (203) 777-0089 |
| A K Electric Inc 15 Parker Pl, New Haven 6512 | (203) 467-7630 |
| Adf Electric 201 Front St, New Haven 6513 | (203) 562-5483 |
| Whittley Electric 597 Whalley Ave, New Haven 6511 | (203) 393-3965 |
| All Electric Co 1266 Townsend Ave, New Haven 6513 | (203) 467-2138 |
| Utility Electric Contractors 112 Lenox St # 1, New Haven 6513 | (203) 624-2300 |
| T F Electric Inc 33 Townsend Ave, New Haven 6512 | (203) 467-9168 |
| Splice Right Electric 89 James St, New Haven 6513 | (203) 785-1858 |
| St John Electric Inc 257 Grand Ave, New Haven 6513 | (203) 865-4323 |
| Connecticut Electrical Assoc 35 Townsend Ave, New Haven 6512 | (203) 466-2040 |
| D M Electric Co 74 Foote St, New Haven 6511 | (203) 288-5774 |
| R & A Electric Co New Haven 6513 | (203) 468-1436 |
| R S Petrillo Co 120 Sargent Dr, New Haven 6511 | (203) 865-5195 |
| E Pierpont Electrical Contr 500 Washington Ave # H, New Haven 6519 | (203) 234-8024 |
| Ed Mor Electric Co Inc 293 Clinton Ave, New Haven 6513 | (203) 752-0103 |
| Parking Lot Light Mntnc Llc 297 Peck St, New Haven 6513 | (203) 777-0054 |
| Pasquariello Electric Corp 297 Peck St, New Haven 6513 | (203) 787-1061 |
| Electrical Services Les Kelson 103 Lombard St, New Haven 6513 | (203) 773-1898 |
| Facility Logistics 37 Townsend Ave, New Haven 6512 | (203) 468-9200 |
| Forest Electric Llc 297 Peck St, New Haven 6513 | (203) 785-0048 |
| Fortin Electric Co 240 Sargent Dr, New Haven 6511 | (203) 497-9366 |
| Martin Electric Inc 138 Bradley St, New Haven 6511 | (203) 624-3307 |
| Lilly Dana Electrical 23 Lelia St, New Haven 6513 | (203) 467-1136 |
| Malangone Electric New Haven 6511 | (203) 931-0388 |
| Lane Electrical Partners 85 Willow St # 4, New Haven 6511 | (203) 787-3561 |