| Code | Description | Code scheme | ||
|---|---|---|---|---|
| 43220 | Plumbing, heating (non-electric) and air-conditioning | Singapore Standard Industrial Classification (SSIC) 2015 | details | |
| 41001 | General contractors (building construction including major upgrading works) | Singapore Standard Industrial Classification (SSIC) 2015 | details | |
| 27104 | Manufacture and repair of switchgear and switchboard apparatus (including switches, circuit breakers and electrical control panels) | Singapore Standard Industrial Classification (SSIC) 2015 | details |