Shower troubles

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mbyme73

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• 6 Sep 2005

• #1

I have just wired my shower the wrong way live to neutral, neutral to live

Ive replaced the shower and the isolating switch but when i now turn the shower on the RCD blows but the not the MCB

Could i have blown one of them

 

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Adam_151

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• 6 Sep 2005

• #2

Getting phase an neutral the wrong way round won't have damaged it, as for the RCD tripping, check you have the neutral in the right neutral block in the CU

 

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mbyme73

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• 6 Sep 2005

• #3

Thanks for quick reply

I never did any work in the cu as the shower was just a replacement but i have noticed the MCB is 32A should i upgrade to 45A
++++++++++++++++++++++++++++++++++++++++++

Sorry the shower is 8.5Kw on 6mm cable through a 45A isolating switch

 

ban-all-sheds

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• 7 Sep 2005

• #4

If the RCD is tripping then you've probably introduced a N/E fault somewhere - reversing Live & Neutral will not cause anything to trip.

32A is too small for an 8.5kW shower, but 45A might be too big for 6mm² cable - do you know where it runs, and if it's grouped with any others, or in conduit or insulation anywhere?