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Over-size feed to high level lighting circuit ?
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<blockquote data-quote="Phoenix" data-source="post: 552834" data-attributes="member: 8133"><p>Nothing wrong with it, but you've probably not got the most efficient design.</p><p></p><p>Consider that your feed cable is not opperating at capacity, and therefore temperature, theres a calculation you can do for a corretcion factor to volt drop, may allow you to go down a size.</p><p></p><p>Consider also, if you wouldn't be better off making at least the feed to the joint with the 4mms 3ph. You might be able to end up with a a smaller CSA 4 core cable on a 10A breaker.</p><p></p><p>If Loop impedance is the thing thats biting, consider tagging your joint box where it converts onto the steelwork of the building (if so constructed)</p><p></p><p>Probably ought to be avoiding RCD on industrial lighting, it shouldn't be necessary if designed properly</p></blockquote><p></p>
[QUOTE="Phoenix, post: 552834, member: 8133"] Nothing wrong with it, but you've probably not got the most efficient design. Consider that your feed cable is not opperating at capacity, and therefore temperature, theres a calculation you can do for a corretcion factor to volt drop, may allow you to go down a size. Consider also, if you wouldn't be better off making at least the feed to the joint with the 4mms 3ph. You might be able to end up with a a smaller CSA 4 core cable on a 10A breaker. If Loop impedance is the thing thats biting, consider tagging your joint box where it converts onto the steelwork of the building (if so constructed) Probably ought to be avoiding RCD on industrial lighting, it shouldn't be necessary if designed properly [/QUOTE]
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Over-size feed to high level lighting circuit ?
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