Web this chapter covers ac electricity generation, distribution, cable sizing and the ac wiring of inverter/charger systems. Web certain sources of electricity (most notably, rotary electromechanical generators) naturally produce voltages alternating in polarity, reversing positive and negative over time. The black wire is the hot wire, which provides a 120 vac current source. Web the neutral wire is the white wire. Electrical engineers, contractors, traders, manufacturers and especially electricians around the world use.
