Discuss mcb tripping after new sockets in the Electrical Forum area at ElectriciansForums.net

Jaco13579

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hi all. A friend asked if i would look at his kitchen sockets as they would trip just the mcb now and then. i said ill look but thats it as he had a electrician install 3 spurs and add 1 socket on a radial circuit 16amp mcb and looks like 6mm t&e from mb for the circuit and looks like the combi boiler is on the same circuit (guessing spured). Here's where my problem is he has under counter fridge/freezer, tumble drier, dishwasher, washing machine, plus all the other kitchen stuff. From my under standing from what i remember the load is to much for the 6mm cable and the 16amp mcb.
I believe hes spoke with the electrician and hes said everything is fine with it.
any advise on this would be great
thanks
 
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buzzlightyear

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your friend needs to get the spark back
and see what's is tripping the mcb, are there a RCD In the consumer unit.
 

Jaco13579

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your friend needs to get the spark back
and see what's is tripping the mcb, are there a RCD In the consumer unit.
yes it has RCD. and will let him know to get him back. and sorry im just asking if this is right for a 16amp radial or should it be a final ring with the load that can be put on it. As i didnt think to much of the work that was done
 

pc1966

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thanks so my under standing he should have made it 20amp radial to take the extra load from the appliances
Probably, but it also depends on the cable's size & route as there are different maximum ratings depending on how well insulated it is thermally-speaking, and so how hot it gets carrying current.

If it is 6mm cable then it can generally do 32A no problem, but I suspect the various sockets are on 2.5mm hence could be anywhere between 13.5A max to 27A (but often 20-21A).
 

Jaco13579

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Probably, but it also depends on the cable's route as there are different maximum ratings depending on how well insulated it is thermally-speaking, and so how hot it gets carrying current.
cheers i just want to make sure he gets the work done that he needs and im sure it runs about 8-10m either in the floor or wall (6mm t&e)
 

telectrix

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under counter fridge/freezer, tumble drier, dishwasher, washing machine, plus all the other kitchen stuff.

wat too much load for a 16A MCB, as said previously, cable capacity (and hence correct MCB rating) will depend on installation method of the 6.0mm T/E.
 

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