I'm a US-trained and US-based electrical engineer. When I want to figure out the the size of a wire I'll need, I reach for my NEC and go to Table 310.16 (most of the time), and it tells me what to use ...
Although the requirements for limiting the ampacities of conductors to that of the terminal temperature ratings found in NEC Table 310.15(B)(16) has been clear in Sec. 110.14(C)(1) for many years ...
Q. How is the conductor ampacity for photovoltaic (PV) circuits calculated? A. PV circuit conductors must be sized to the larger of 690.8(B)(2)(a) or 690.8(B)(2)(b). Sizing according to 690.8(B)(2)(a) ...
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