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Electrician Talk Forum
Chewing The Fat..... "Volt-Drop"...
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<blockquote data-quote="HappyHippyDad" data-source="post: 558359" data-attributes="member: 38086"><p>50m of 2.5mm pulling 20A gives 18V VD approx. That is quite a bit outside of the limits.</p><p></p><p>Could you not use 4mm, 6mm or perhaps even 10mm from socket to outbuilding.</p><p>4mm = 13.8V (total VD for whole run)</p><p>6mm = 11.58V</p><p>10mm = 9.84V</p><p></p><p>Plus, change the MCB to 16A which would give a total VD of 7.88V from CU to outbuilding if you use 10mm from socket to shed.</p><p></p><p>Back to your original point, 2.5mm would probably be fine and never cause problems<img class="smilie smilie--emoji" loading="lazy" alt="😄" title="😄" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f604.png" /></p><p></p><p>Plus, voltage still always seems to be closer to 240V rather than 230V!</p></blockquote><p></p>
[QUOTE="HappyHippyDad, post: 558359, member: 38086"] 50m of 2.5mm pulling 20A gives 18V VD approx. That is quite a bit outside of the limits. Could you not use 4mm, 6mm or perhaps even 10mm from socket to outbuilding. 4mm = 13.8V (total VD for whole run) 6mm = 11.58V 10mm = 9.84V Plus, change the MCB to 16A which would give a total VD of 7.88V from CU to outbuilding if you use 10mm from socket to shed. Back to your original point, 2.5mm would probably be fine and never cause problems😄 Plus, voltage still always seems to be closer to 240V rather than 230V! [/QUOTE]
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Chewing The Fat..... "Volt-Drop"...
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