| Naics index | Naics index description |
|---|---|
| 238210 | Solar panel installation |
| 238210 | Sound equipment installation |
| 238210 | Surveillance system, installation only |
| 238210 | Telecommunications equipment and wiring (except transmission line) installation contractors |
| 238210 | Telephone equipment and building wiring installation |
| 238210 | Telephone installation contractors |
| 238210 | Temperature control system installation |
| 238210 | Traffic signal installation |
| 238210 | Tunnel lighting contractors |
| 238220 | Air system balancing and testing |