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Electrician Talk Forum
Voltage drop. Would you be concerned?
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 503172" data-attributes="member: 250"><p>If you have calculated 4.7% I would be guessing you are using 240v as your nominal volatge?</p><p></p><p>Think you should use 230V?</p><p></p><p>But even so...</p><p></p><p>Have you even considered what current would be compliant over 25m+7m 4.0mm.. ( + whatever few metres you also have on your final circuits?)</p><p></p><p>Even a 20A MCB is just on the 3% limit..</p><p></p><p>NOW.. if you tell your customer you are only doing a 16A outbuilding supply.....</p><p></p><p>BUT if you really want a 32A supply....</p><p></p><p>Have you actually done calc's for 6.0mm over 32m?</p><p></p><p>Technically I think you will find that is just over 3% when calc'd using either 230v or 240v...</p><p></p><p>How big is the outbuilding?</p><p></p><p>How long will the final circuits in there be?</p><p></p><p> Guinness </p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 503172, member: 250"] If you have calculated 4.7% I would be guessing you are using 240v as your nominal volatge? Think you should use 230V? But even so... Have you even considered what current would be compliant over 25m+7m 4.0mm.. ( + whatever few metres you also have on your final circuits?) Even a 20A MCB is just on the 3% limit.. NOW.. if you tell your customer you are only doing a 16A outbuilding supply..... BUT if you really want a 32A supply.... Have you actually done calc's for 6.0mm over 32m? Technically I think you will find that is just over 3% when calc'd using either 230v or 240v... How big is the outbuilding? How long will the final circuits in there be? Guinness [/QUOTE]
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Voltage drop. Would you be concerned?
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