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Induction hob spark fault

Jimi

Went to a call out. I was told that the induction hob sparked while in use which tripped the RCD. It's a hob and oven on a circuit together. Apparently the same thing happened before (last year I think) so the hob and oven were replaced (student property). Any ideas what may have caused this? The only thing I thought of was loose connections (causing an arc which creates a surge in the hob?). The cooker plate connections were loose so I tightened them. Any other ideas? Maybe:

Loose connections or cable damage (limiting the current flow to the appliance or creating arcs?)

Faulty appliance

Incorrect polarity?

Incorrect voltage?

Thanks.

Parents
  • 0

    Could be almost anything from static electricity at the harmless end , up to the horrific possibility that the house is off-earth, and the whole lot floats relative to true earth. Where was the spark, and did anyone get a shock off something and if so what ?

    Eliminate the worst possibilities by bringing a wander lead in from true earth (screw driver in the lawn style, and verify that the cases of the units are really at earth voltage not just connected together) Then check  between the MET  and all the things that should be earthed .

    Mike

Reply
  • 0

    Could be almost anything from static electricity at the harmless end , up to the horrific possibility that the house is off-earth, and the whole lot floats relative to true earth. Where was the spark, and did anyone get a shock off something and if so what ?

    Eliminate the worst possibilities by bringing a wander lead in from true earth (screw driver in the lawn style, and verify that the cases of the units are really at earth voltage not just connected together) Then check  between the MET  and all the things that should be earthed .

    Mike

Children
  • 0 in reply to mapj1

    I've never heard of this. The cooker connection unit / plate Zs was 0.28 ohms. Then there was 240V between line and the metal casing of the hob and oven showing it is connected to earth / cpc. Doesn't the Zs reading prove the earth fault loop path...hold on I think I get you...as in the earth connection at the distributors transformer could be broken? So you test from true earth to make sure? It could just go down the boding though to gas and water? You disconnect these?

    They just said the hob sparked when they were using it and it tripped the RCD. Why would no earth connection cause a spark anyway out of interest?

    Just had an email from the company - “Half of the hob isn’t working following a visit from the electrician and when we try to turn the stove off at the switch there is a sparking noise”

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