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Old 05-23-2014, 11:00 AM   #21
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Originally Posted by Ultrafault View Post
None of these explanations show that it is better, cheaper, or even as good as just run your wires from larger to smaller. The only thing I am hearing is "Some guy speced it. Must be better".
The OP had seen this and the field and asked about it. I merely said that it's common on large jobs and have been told that it's a cost reduction measure. Is it better, cheaper or just as good as another method? That would be a good question for an engineering forum
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Old 05-23-2014, 11:41 AM   #22
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If you just sized the run for load and VD consistently for the whole circuit... Would it really cost THAT much more? That's a real question, not a rhetorical one. Seems like by the time you do all the complex calculations necessary to change wire size mid circuit and know what VD is going to be, buy 5-6 rolls of different sized wire, change the spools mid stream, supervise all this to make sure wrong size isn't pulled from point c to point d etc etc. would have been easier (and maybe cheaper?) to just say go grab that #4 and wire those lights. But then I suppose I'm no engineer, and I'm not wiring miles of lights.
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