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Do-It-Yourself (DIY) Question & Answer Forum
Why is volt drop so important?
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<blockquote data-quote="Janice" data-source="post: 58311" data-attributes="member: 2589"><p>This is one of those cases where you need to apply diversity quite ruthlessly.</p><p></p><p>It appears common practise to just tot up the value of the MCB's and calculate volt drop based on this maximum.</p><p></p><p>If there is just a 100w lamp, allow 1 amp for lighting (I know, we only need half an amp) and if there are a couple of sockets, allow 7 amps and downrate the MCB. Now how big is that cable?</p><p></p><p>Anything bigger than this that you can pull in is a bonus but will, in all probability, carry everything that is demanded of it.</p><p></p><p>Would you have got the job?</p><p></p><p>J</p></blockquote><p></p>
[QUOTE="Janice, post: 58311, member: 2589"] This is one of those cases where you need to apply diversity quite ruthlessly. It appears common practise to just tot up the value of the MCB's and calculate volt drop based on this maximum. If there is just a 100w lamp, allow 1 amp for lighting (I know, we only need half an amp) and if there are a couple of sockets, allow 7 amps and downrate the MCB. Now how big is that cable? Anything bigger than this that you can pull in is a bonus but will, in all probability, carry everything that is demanded of it. Would you have got the job? J [/QUOTE]
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Why is volt drop so important?
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