| Code | Description |
|---|---|
| 4101 | Electric light and power |
| 4102 | Gas manufacture and distribution |
| 4103 | Steam and hot water supply |
| Code | Description |
|---|---|
| 401 | Production, collection and distribution of electricity |
| 402 | Manufacture of gas; distribution of gaseous fuels through mains |
| 403 | Steam and hot water supply |