This answer is based on the 2017 NEC. A. When more than 30 current‑carrying conductors are installed in any cross‑sectional area of the wireway, the conductor ampacity, as listed in Table 310.15(B)(16 ...
Most wire or string is made with a circular cross section of some particular radius and diameter. The area of that cross section is the well known A = pi*R² which is colloquially pronounced as “pie ...
The hindrance to the flow of electric charge is known as Resistance. The obstruction posed in the way of current carrying particles by fixed particles creates resistance in an electric circuit. Since ...
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