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04:32pm, 11/14/10

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Central heating MCB

www.homeownershub.com/uk-diy/Central-heating-MCB... - Details

builders_pal: #diy Central heating MCB: My CH MCB is rated at 15A, however the entire system is fed through a fused switch wit... LINK ... My CH MCB is rated at 15A, however the entire system is fed through a fused switch with a 3A fuse. Shouldn't the MCB...

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builders_pal saved this page on 11/14/2010 12:03pm

#diy Central heating MCB: My CH MCB is rated at 15A, however the entire system is fed through a fused switch wit... LINK ... My CH MCB is rated at 15A, however the entire system is fed through a fused switch with a 3A fuse. Shouldn't the MCB be rated 3A as well? The existing cable from the MCB runs to a junction box then to the old fused switch. It looks like 1.5mm^2 cable.

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