Chapter 4

Electrical calculations

Amps, volts and how much fits

An explorable chapter on electrical exam math: Ohm's law and power, the 80% continuous-load rule, single-phase voltage drop and conduit fill from NEC Chapter 9.

1. 4.1
   Ohm's law and powerI = P ÷ V
2. 4.2
   Voltage dropLong runs lose volts
3. 4.3
   Conduit fill40% for three or more conductors

3 slider tasks · 2 practice sets · 8 questions