| Business | Phone |
| A R Mendillo Inc 15 Corporate Ridge Rd # 1, Hamden 6514 | (203) 407-1670 |
| Viscuso Electric & Son 22 Old Pasture Ln, Hamden 6518 | (203) 230-8388 |
| Apple Electrical Systems 138 Worth Ave, Hamden 6518 | (203) 230-0770 |
| Arnold Goldberg Electric Llc 17 Bagley Ave # A, Hamden 6514 | (203) 230-5968 |
| Treadwell Electric Inc 600 Sherman Ave, Hamden 6514 | (203) 287-8239 |
| Superior Electrical Constr Llc 62 Crestway, Hamden 6514 | (203) 848-3232 |
| Supreme Electrical Contractors 62 Crestway, Hamden 6514 | (203) 288-9242 |
| Cag Electrical Co Inc 373 Mather St, Hamden 6514 | (203) 287-0814 |
| Cell Comm Electrical Svc 12 Alstrum St, Hamden 6514 | (203) 776-2883 |
| Small Job Specialist Electric 100 Filbert St, Hamden 6517 | (203) 230-1833 |
| Commercial Electrical 6 Corporate Ridge Rd, Hamden 6514 | (203) 248-9003 |
| D C Electric Co 6 Corporate Ridge Rd # 4, Hamden 6514 | (203) 287-8738 |
| Power Electric 1507 Shepard Ave, Hamden 6518 | (203) 281-0888 |
| Ed Mor Electric Co 2660 State St, Hamden 6517 | (203) 248-9351 |
| P C Electric Inc 23 Serafin Ct, Hamden 6518 | (203) 248-4736 |
| Papa Electric 17 Hamden Park Dr, Hamden 6517 | (203) 281-4246 |
| F & L Electrical Contractors 12 Alstrum St, Hamden 6514 | (203) 782-2336 |
| Oren Electric Llc 67 Howard Dr, Hamden 6514 | (203) 281-4044 |
| Anthony Gamberdella Jr 1703 State St, Hamden 6517 | (203) 248-5188 |
| Genovese & Massarao Inc 2466 State St, Hamden 6517 | (203) 230-9055 |
| H & H Electric & Construction 46 Norman Rd, Hamden 6514 | (203) 288-5210 |
| Hird Electrical Contractors 1013 Dixwell Ave # R, Hamden 6514 | (203) 288-3297 |
| Jns Electric 27 Peck Ln, Hamden 6518 | (203) 287-8318 |