Zoomup:AJJewsbury:for fusing down extractor fans to 3 Amp for permanent L and 3 Amp for trigger L
Does that make (in BS 7671 terms) two distinct circuits with a shared N?
- Andy.Dunno about that, but it does follow the manufacturer's instructions about fusing the extractor fan at 3 Amp. This is required if the lighting supply which feeds the light switch triggered timer fan is protected by a 6 or10 Amp M.C.B.
Z.
Do the instructions really ask for two separate fuses? I thought the usual solution was to fuse down before the light, so feeding the light and L and SL to the fan with a single fuse. Two fuses with a common N would seem to technically be a contravention of 521.8.2.
- Andy.
Zoomup:AJJewsbury:for fusing down extractor fans to 3 Amp for permanent L and 3 Amp for trigger L
Does that make (in BS 7671 terms) two distinct circuits with a shared N?
- Andy.Dunno about that, but it does follow the manufacturer's instructions about fusing the extractor fan at 3 Amp. This is required if the lighting supply which feeds the light switch triggered timer fan is protected by a 6 or10 Amp M.C.B.
Z.
Do the instructions really ask for two separate fuses? I thought the usual solution was to fuse down before the light, so feeding the light and L and SL to the fan with a single fuse. Two fuses with a common N would seem to technically be a contravention of 521.8.2.
- Andy.
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