My extractor fan makes a lot of noise with very little to show for it. I was hoping to do a simple swap for a replacement fan, however when looking at the wiring, it doesn't follow best practise as shown here: //www.diynot.com/wiki/electrics:lighting:fan
Instead, a 2 pole isolator switch is run directly from the lighting circuit. The neutral and permanent (isolated) live then run to the fan over T+E (no ground required). However the switched live runs from a separate piece of T+E to a junction box at the nearest light. Only the switched live wire is used in this piece of T+E.
So we have: Lighting main -> Isolator switch (perm. live and neutral) -> Fan -> Light (switched live) -> Light switch -> Lighting main
I'm not sure if this is safe to leave as it is or if it requires me to get a sparky to fix it. Money is tight at the moment so would prefer to leave it alone if it's safe.
Doesn't appear to be a "borrowed neutral" as the neutral is disconnected from the isolator and besides, they're on the same circuit anyway?
Advise appreciated.
Cheers,
Ken.
Instead, a 2 pole isolator switch is run directly from the lighting circuit. The neutral and permanent (isolated) live then run to the fan over T+E (no ground required). However the switched live runs from a separate piece of T+E to a junction box at the nearest light. Only the switched live wire is used in this piece of T+E.
So we have: Lighting main -> Isolator switch (perm. live and neutral) -> Fan -> Light (switched live) -> Light switch -> Lighting main
I'm not sure if this is safe to leave as it is or if it requires me to get a sparky to fix it. Money is tight at the moment so would prefer to leave it alone if it's safe.
Doesn't appear to be a "borrowed neutral" as the neutral is disconnected from the isolator and besides, they're on the same circuit anyway?
Advise appreciated.
Cheers,
Ken.