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Discuss 28A in 4mm cable 6.5kw hob in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Jackr123
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    Jackr123 New EF Member

    Location:
    Portsmouth
    i need to wire in an induction hob which is 6.5kw and the cable already chased in is 4mm and would be a real pain to replace for a bigger. I just wanted to know if it would be alright or play it safe with a 6mm?
     
  2. Dave OCD
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    Dave OCD Electrician's Arms

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    How long is the cable run, does it pass through any type of insulation ?
     
  3. Jackr123
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    Jackr123 New EF Member

    Location:
    Portsmouth
    Sorry forgot to mention that. The run is 15m, clipped direct and passes through no insulation.
     
  4. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    I would normally run 6mm - then there is plenty of scope for future changes .........
     
  5. polo1
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    polo1 Electrician's Arms

    Location:
    Glasgow
    Business Name:
    GW Electrical & Security
    Well Ref B gives you 28A max on 4mm t&e and the appliance is unlikely to draw all its 6500W at the same time, so 4mm should be fine unless a more onerous installation method has been used.
    Ok, clipped direct gives you even more headroom.
     
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  6. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    4mm clipped direct is 37 amps so depending on the installation method, 4mm is acceptable as I can't see zs being an issue if only 15 meters long.
    Also diversity can be applied so the load is likely to be lower than 28 amps anyway.
     
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  7. Jackr123
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    Jackr123 New EF Member

    Location:
    Portsmouth
    Thank you all very much. Saved me a lot of time and money.
     
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  8. Dave OCD
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    Dave OCD Electrician's Arms

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    Yep in this case 4mm would be fine, but obviously just an isolator for the hob, not a panel with a socket as well. And a 32a MCB for the OCPD, not a fuse.
     
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  9. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    The hob being 6.5kw - but what would it actually draw?

    I've just been working on a kitchen where the customer sourced, induction hob, came fitted with a 13A plug!
     
  10. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    Just over 15 amps applying diversity so even if you had a socket on the control panel that's only 20 amps.
     
  11. Dave OCD
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    Dave OCD Electrician's Arms

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    No point having a socket as well on a 4mm, pushing your luck IMO. You just know the 3kW 'fast boil' kettle will end up in there. :rolleyes:
     
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  12. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    The 4mm will handle it as you'll never overload the 32 amp OCPD 15 amps + a 13 amp kettle if that's what it pulls and a CCC of 37 amps.
    Don't be so pessimistic dave :p
     
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  13. Dave OCD
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    Dave OCD Electrician's Arms

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    Now then Ian you're forgetting the oft quoted Christmas Day scenario. :)
     
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  14. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    what's wrong with plugging it into the light ( using a bayonet plug, of course). it worked for my mum's iron for 40 years.
     
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  15. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    That's what a microwave is for!
    Microwaved turkey mmmmmm
     
  16. jackhammerJIM
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    jackhammerJIM Regular EF Member

    Location:
    north yorks
    Had one last month murdoch it was a siemens 4 zone and i was only armed with a cooker outlet plate :rage:
     
  17. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    Change the out let plate for a socket. Simples
     
  18. jackhammerJIM
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    jackhammerJIM Regular EF Member

    Location:
    north yorks
    Had one last month murdoch it was a siemens 4 zone and i was only armed with a cooker outlet plate :rage:
    and i did after an unwanted trip to the wholesalers
     
  19. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    Do you not carry sockets?
     
  20. jackhammerJIM
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    jackhammerJIM Regular EF Member

    Location:
    north yorks
    I have a van full of all sorts but on this particular day no single sockets
     
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  21. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    Unwanted trips too suppliers are such a waste of time and money
     
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