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Discuss 1.5mm coming from a 20a isolator in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. rugbylad
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    rugbylad Regular EF Member

    What is people’s opinion on 2.5mm swa entering a rotary isolator and a 1.5mm swa leaving on a 20a mcb? Having a bit of a discussion with a colleague.
     
  2. telectrix
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    telectrix Scouser and Proud of It Respected Member

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    Location:
    cheshire/staffordshire
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    Telectrix
    what's the load current/wattage.and is it a fixed load?
     
  3. spinlondon
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    spinlondon Forum Mentor

    Location:
    Harlow Essex
    Single phase or 3 phase?
     
  4. rugbylad
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    rugbylad Regular EF Member

    There’s a 1kw heater and 2 led lights not sure what wattage they are but they’re not huge just in a little store.
     
  5. rugbylad
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    rugbylad Regular EF Member

    Single
     
  6. spinlondon
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    spinlondon Forum Mentor

    Location:
    Harlow Essex
    Should be fine, unless it’s in a wall with insulation.
     
  7. Pete999
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    Pete999 Forum Mentor

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    Northampton
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    None
    What is your opinion rugbylad?
     
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  8. rugbylad
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    rugbylad Regular EF Member

    Well I think it is acceptable, it can take a round 24 amps with it being on tray and clipped in places, the total load probably won’t be m0re than 10amps and I’d say at a rough estimate theres about 25m of swa, so no issue on length of run.
     
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