MCB trips when i switch lights on but not if i use an RCD

Joined
10 Aug 2005
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Location
Tyne and Wear
Country
United Kingdom
If i connect the light circuit on the RCD side of the bus bar they work great but if i connect them direct to a non protected MCB they trip? Any ideas.
 
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what trips? MCB or RCD. if RCD, youve probably got the neutral in the wrong place, as already mentioned. if MCB, then something bad is goin on...
 
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neutral barS, you will have 2, be sure to use the correct one when swapping the MCB around.
 

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