| Business | Phone |
| Hubbard Lighting & Power Systs 9244 E Hampton Dr # 602, Capitol Heights 20743 | (301) 333-9188 |
| Natelco Corp 120 W Hampton Ave, Capitol Heights 20743 | (301) 350-1325 |
| A Action Electric Capitol Heights 20743 | (301) 899-1211 |
| Ava Electric Co 1410 Marblewood Ave, Capitol Heights 20743 | (301) 386-8839 |
| Swope Electric 1306 Ritchie Rd, Capitol Heights 20743 | (301) 336-7479 |
| Ec Ernst Inc 1420 Ritchie Marlboro Rd # B, Capitol Heights 20743 | (301) 350-7770 |
| Ferguson & Ramey Electrical 8900 Edgeworth Dr # J, Capitol Heights 20743 | (301) 333-8400 |