CERAMIC HOB
- Thread starter STEVE461
- Start date
Who fitted the consumer unit - did you get any certification ?
What is the amp value of the MCB that is tripping? Is it an MCB or an RCBO (an RCBO will have a test button on it).
PS Please don't SHOUT
PS Please don't SHOUT
i had the consumer unit fitted a few weeks ago (certificate in order) by a professional sparky but i myself changed the hob as shown by the sparky (turn off power supply,remove hob undo l/n/e wires then replace with new one in reverse it would save me £30) he said it may trip the fuse due to leakage? then it needs putting on a non protected circuit which had me worried so im trying to find out exactly what may be causing it and would it be really safe on an unprotected circuit as it sounds dangerous and why a quallified sparky would say this but he didnt explain what an unprotected circuit was or is it just another way to get more money out off me thanks
my consumer box consists of 100amp(main switch) 63amp(rcbo)b40/b32(hob)/b32(upstairs sockets x 4)/16b/6b/63amp(rcbo)32b(kitchen sockets x 5/32b(room sockets x 3/16b/6b(upstairs lights)/6b(downstairs lights) hope this helps as both 63amp rcbo trip thanks
It would be much easier to understand you if you used more punctuation and less of just a long stream of words.
If the MCB trips, either the new hob is faulty (unlikely), or you have wired it incorrectly.
Any chance of a bit of consistency and accuracy?
They aren't RCBOs they are RCDs.
You now say that it's not a residual current device which is tripping, it's an overload one, so moving to a non-protected circuit would make no difference.
And you don't have any non-protected circuits anyway, so you couldn't move it - your electrician's advice was rubbish.
Unless desperately faulty a 6kW hob will not trip a 32A MCB - are you sure your wiring is sound?
the connection box under the hob is well labelled live neutral earth so i know i have'nt made a mistake there i didnt need or touched any other connections/wires everything is ok when i switch the wall switch on then when i turn a hob ring on a red light flashes for a millisecond then it trips the mcb should i just call the sparky back if so what is and how dangerous is an unprotected circuit just the word "unprotected" worries me
STEVE461
The circuit is protected both by RCD and by MCB, so that is not a concern.
You must have misunderstood your electrician, their advice would have been to have the hob circuit on a separate RCD/MCB combo by means of a RCBO, taking it away from the RCD protected side, to prevent tripping via earth leakage build up.
If it's the 63Amp RCD/RCCB that is tripping, check you have not nicked any of the insulation on the conductors you have terminated. This could happen when you fitted the face plate, cable grips or any protective covers back on.
I assume the old ceramic hob had worked on this circuit (after new CU install) without problem?
If it had not or you had not had it in use, also check the rest of the connections at the isolator switch.
If they are all okay, then turn all the other breakers off that are protecting circuits on the 63A RCD/RCCB. Leaving only the hob one live, then try it see if it still trips, if it does and the electrician has checked that circuit and the results prove it was fit for continued service, it is likely either you have a faulty hob or isolation switch! Any damp around the isolation switch?
The circuit is protected both by RCD and by MCB, so that is not a concern.
You must have misunderstood your electrician, their advice would have been to have the hob circuit on a separate RCD/MCB combo by means of a RCBO, taking it away from the RCD protected side, to prevent tripping via earth leakage build up.
If it's the 63Amp RCD/RCCB that is tripping, check you have not nicked any of the insulation on the conductors you have terminated. This could happen when you fitted the face plate, cable grips or any protective covers back on.
I assume the old ceramic hob had worked on this circuit (after new CU install) without problem?
If it had not or you had not had it in use, also check the rest of the connections at the isolator switch.
If they are all okay, then turn all the other breakers off that are protecting circuits on the 63A RCD/RCCB. Leaving only the hob one live, then try it see if it still trips, if it does and the electrician has checked that circuit and the results prove it was fit for continued service, it is likely either you have a faulty hob or isolation switch! Any damp around the isolation switch?
I'm out.
Your refusal to follow the most basic rules of writing makes your posts unnecessarily hard to understand.
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