BASIC NEC CODE RULES AND DESIGN PRACTICE

70 25-42 60. 43 and above 50 *If circuit is loaded up to 80% ampacity, then 6 phase wires can be put in one conduit. ... For example, two 200 amp panels should have a 400 amp service to allow for added circuits in the future. 4.The main breakers in the building provide over current protection for the power panels, and must not be sized larger ... ................
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