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7,300 Watts supplied on a 2.5mm2 T&E.

Zoomup

Yes a 2.5mm2 T&E cable can supply a 7,300 Watt instantaneous water heater at 240 Volts. I came across this today. The supply was from a B32 M.C.B. So why do we use bigger cable than 2.5mm2 if it will do the job?

The run was about 5m maximum. 

Z.

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  • Former Community Member
    0 Former Community Member

    gkenyon: 
     

    whjohnson: 
     

    Go on Dave, tell us what current a 2.5mm cable can carry at -273K. I'm intrigued.

     

    0 K surely? It's not called absolute zero for nothing!

    -273C yes …


    (Apologies for pedancy)

    -273C is substantially above absolute zero in thermodynamic terms.

    On the substantive topic why not fit a time switch to limit the run time?

     

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  • Former Community Member
    0 Former Community Member

    gkenyon: 
     

    whjohnson: 
     

    Go on Dave, tell us what current a 2.5mm cable can carry at -273K. I'm intrigued.

     

    0 K surely? It's not called absolute zero for nothing!

    -273C yes …


    (Apologies for pedancy)

    -273C is substantially above absolute zero in thermodynamic terms.

    On the substantive topic why not fit a time switch to limit the run time?

     

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