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Functional switching: Table 537.4Can a fuse be used for functional switching?
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A common question — name the devices that can be used for functional switching, and where is the table? It is not in Guidance Note 3.
The On-Site Guide · Table J1 · pp.229–231 reproduces it. The right-hand column is functional switching, and some answers surprise people:
| Device | Functional switching? |
|---|---|
| Switch-disconnector | Yes |
| Isolating switch | Yes |
| Disconnector | No |
| Fuses | No |
| Luminaire connecting device | No |
| Luminaire supporting coupler | No |
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