| Business | Phone |
| Alan Wallace Electrical Contr 22180 Knox Rd, Twain Harte 95383 | (209) 586-5860 |
| Cedar Ridge Electric Co 23003 Joaquin Gulley Rd, Twain Harte 95383 | (209) 586-6541 |
| Oz Electric Co Po Box 1999, Twain Harte 95383 | (209) 586-9421 |
| Stone Electric Inc 22444 Knox Rd, Twain Harte 95383 | (209) 586-7133 |
| Wray Plumbing & Electric Inc 21826 Knox Rd, Twain Harte 95383 | (209) 586-5828 |