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Wiring 10 vector heaters supplied by 10mm cable.

Former Community Member
Former Community Member
Hi,


Whilst on site a few weeks ago, I noticed an electrician wired 10 vector heaters onto a 10 gangway switch.

​​​​each of the switches turned each of the heater's on. 

however, all these switches were supplied by the 10mm cable I was running above the ceiling tiles. 

Now I noticed each heater had a power rating of 2500 watts, 


So assuming all the heater's were turned on, and given the kind of premises it was, all the heater's would be on if used, that would have been a total of 25000 watts supplied by a 10mm cable. 


I'm just confused as to how he wired it,

Im pretty sure they were wired parralel, as each heater had it's own flex going straight to the switch board. Can anyone can help with a wiring diagram. It's really been bugging me.
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    In amongst all the issues you have to consider the size and ratings of the terminals in the fittings. 

    I would install a substantial distribution circuit to a consumer unit or distribution board that is rated to carry the full load with a 100 amp main switch and then run each final circuit from there with its own 16 amp MCB and a double pole isolation switch are the location of each heater. 


    At least that set-up won't burn the building down, it does of course require a adequate supply at the intake. 


    Andy Betteridge
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  • 0
    In amongst all the issues you have to consider the size and ratings of the terminals in the fittings. 

    I would install a substantial distribution circuit to a consumer unit or distribution board that is rated to carry the full load with a 100 amp main switch and then run each final circuit from there with its own 16 amp MCB and a double pole isolation switch are the location of each heater. 


    At least that set-up won't burn the building down, it does of course require a adequate supply at the intake. 


    Andy Betteridge
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