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<blockquote data-quote="binky" data-source="post: 528319" data-attributes="member: 490"><p>the classic update by adding a single external RCD for the entire board - no longer acceptable due to 'nuisnace tripping' ie a single fault wipes out the entire house elecrical supply. </p><p></p><p>30A is too large for a 2.5mm cable, which is rated at 26Amps maximum. I would fit 20Amp so that it's not pushing the mcb to it's limits. </p><p></p><p>Holes in board / isolators contravene 'ingress protection' and allow finger insertion - rough work.</p><p></p><p>To be frank, if you have the old plug in MCBs it may well be worth considering a full EICR (inspection and test) and getting the board updated. The one good thing about single RCDs is that you almost certainly havn't got any major issues with cabling / appliances, or it would keep tripping out.</p></blockquote><p></p>
[QUOTE="binky, post: 528319, member: 490"] the classic update by adding a single external RCD for the entire board - no longer acceptable due to 'nuisnace tripping' ie a single fault wipes out the entire house elecrical supply. 30A is too large for a 2.5mm cable, which is rated at 26Amps maximum. I would fit 20Amp so that it's not pushing the mcb to it's limits. Holes in board / isolators contravene 'ingress protection' and allow finger insertion - rough work. To be frank, if you have the old plug in MCBs it may well be worth considering a full EICR (inspection and test) and getting the board updated. The one good thing about single RCDs is that you almost certainly havn't got any major issues with cabling / appliances, or it would keep tripping out. [/QUOTE]
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