| Business | Phone |
| Brown & Heim Electric Contrs 20 N Paca St, Baltimore 21201 | (410) 265-0320 |
| Calmi Electrical Co 220 N Franklintown Rd, Baltimore 21223 | (410) 624-3284 |
| Donlee Electric Inc 1264 Henry St, Baltimore 21230 | (410) 752-2522 |
| Eastern Sales & Engineering 6102 Falls Rd, Baltimore 21209 | (410) 377-0123 |
| Enterprise Electric Co Inc 4204 Shannon Dr, Baltimore 21213 | (410) 488-8200 |
| Red Rose Electric 458 Machias Pl, Baltimore 21220 | (410) 335-1237 |
| James J Brannan Electric Inc 101 N Lakewood Ave, Baltimore 21224 | (410) 276-1800 |
| Mark Perhamsky Co 5418 Reisterstown Rd, Baltimore 21215 | (410) 358-2745 |
| A & J Electric Inc 9623 Philadelphia Rd, Baltimore 21237 | (410) 687-5151 |
| Auer Electric Inc 4238 Klein Ave, Baltimore 21236 | (410) 661-4300 |
| Brown & Heim Inc 3620 Commerce Dr # 714, Baltimore 21227 | (410) 247-4215 |
| C W Wright Co Inc 2930 Hammonds Ferry Rd, Baltimore 21227 | (410) 247-0220 |
| Welsh Electric Corp 600 S Caton Ave, Baltimore 21229 | (410) 945-7000 |
| Farrara & Assoc Inc 8032 Belair Rd # 2, Baltimore 21236 | (410) 882-1128 |
| Urban Francis 8804 Philadelphia Rd, Baltimore 21237 | (410) 682-3900 |