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High Volt Drop On Lighting Circuit 2A Mcb?
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<blockquote data-quote="darren23" data-source="post: 381507" data-attributes="member: 25547"><p>Hi I'm in the process of installing a small bd in a out house it has a exsiting 2.5 3 core swa supply of a 16A mcb which I would like to utilise I have calculated the Vd for the swa and it's 6.08v I want to run 2 sockets and 3 florescent lights by using a small DB with a 16A mcb for sockets and a 6A fir lighting both protected by a rcd main switch the problem is after I calculated the volt drop for the lights it goes overthe 3% as you calculate it against the size of mcb not the demand.</p><p></p><p>If I was to use a 2a mcb volt drop goes just under 3% so all is good in the world again.</p><p></p><p>Can any one see a problem with this.</p><p></p><p>Also I should say that the out building has a large steel lintel which will need to be bonded so installation will have to be a tt</p></blockquote><p></p>
[QUOTE="darren23, post: 381507, member: 25547"] Hi I'm in the process of installing a small bd in a out house it has a exsiting 2.5 3 core swa supply of a 16A mcb which I would like to utilise I have calculated the Vd for the swa and it's 6.08v I want to run 2 sockets and 3 florescent lights by using a small DB with a 16A mcb for sockets and a 6A fir lighting both protected by a rcd main switch the problem is after I calculated the volt drop for the lights it goes overthe 3% as you calculate it against the size of mcb not the demand. If I was to use a 2a mcb volt drop goes just under 3% so all is good in the world again. Can any one see a problem with this. Also I should say that the out building has a large steel lintel which will need to be bonded so installation will have to be a tt [/QUOTE]
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