Bathroom Extractor with Timer

Discussion in 'Electricians' Talk' started by Eney, Aug 2, 2021.

  1. Eney

    Eney Member

    I am replacing Vent Axia ACM 100T extractor fan.

    The old one was removed and the new one connected. Previously no 3 pole isolator nor fuse

    3 pole isolator installed,

    L1 Permanent Live
    L2 Switched Live
    L3 Neutral

    Is this correct?

    Secondly.

    Do I put a fused unit on the Permanent Live and another one on the Switched Live?

    Thanks for reading
     
  2. Jimbo

    Jimbo Screwfix Select

    the fan instructions should detail the fuse requirements. What breaker is serving the circuit to which it is connected?
     
    Eney likes this.
  3. Eney

    Eney Member

    The fan instructions "The fan motor is fitted with Thermal Overload Protection. This is a one-shot thermal fuse. In the event of a fault condition the fan will be automatically switched off"

    Breaker is MCB B6
     
  4. sparky steve

    sparky steve Screwfix Select

    Note earths are omitted in diagram for clarity. Remember to connect all necessary earthing.
     

    Attached Files:

    Eney likes this.
  5. Bazza

    Bazza Screwfix Select

    The instructions do not show a fused unit. Why do you think you need one or (even) two?

    You say that
    So the introduction of fused units would be pointless.
     
    Eney likes this.
  6. Jimbo

    Jimbo Screwfix Select

    I recently had a timer circuit fail but the (pricey TD-Silent 250) fan itself still runs fine. So I wired the fan to a £4 GRT8-M1 relay timer.

    Afterwards it occurred to me that I could have bought a 4-way enclosure and used a 1A 3-pole MCB instead of the usual unfused fan isolator alongside the timer. Just seems like a better idea to me.
     
  7. Severntrent

    Severntrent Screwfix Select

    £4????
     
  8. Jimbo

    Jimbo Screwfix Select

  9. Bazza

    Bazza Screwfix Select

    That’s real quality.
     

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