| Business | Phone |
| Dranetz-Bmi 2665 Kennedy St, Livermore 94551 | (925) 449-1254 |
| Electro-Test Inc 1951 Rutan Dr, Livermore 94551 | (925) 243-6350 |
| Independent Electrical Testing 6363 Collier Canyon Rd, Livermore 94551 | (925) 447-6577 |
| Electrical Reliability Svc 1951 Rutan Dr, Livermore 94551 | (925) 243-6350 |
| United Circuit Breakers Inc 438 Preston Ct, Livermore 94551 | (925) 371-0767 |