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Exam calculations, written out one small step at a time.
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How do you calculate voltage drop on a 120V circuit?
NEC 210.19 informational note, Chapter 9 Table 8
Solve it with meHow many cubic inches does a device box need?
NEC 314.16(B)
Solve it with meHow many 12 AWG THHN wires fit in 3/4 inch EMT?
NEC Chapter 9 Table 1, Table 4, Table 5, Annex C
Solve it with meWhat size grounding electrode conductor for 3/0 copper service conductors?
NEC Table 250.66
Solve it with meWhat minimum ampacity does a 5 HP motor circuit need?
NEC 430.22, Table 430.248
Solve it with meHow do you calculate a dwelling's general lighting load?
NEC Article 220, Part III
Solve it with meWhat is the primary current of a 45 kVA transformer?
NEC Article 450, Chapter 9 math
Solve it with meWhat conductor size does an HVAC nameplate MCA require?
NEC Article 440, Table 310.16
Solve it with meWhat size breaker does a 48 amp EV charger need?
NEC Article 625, 210.20(A)
Solve it with meHow long must a pull box be for a straight pull?
NEC 314.28(A)(1)
Solve it with meWhat size copper conductors for a 200 amp dwelling service?
NEC 310.12, Table 310.16
Solve it with meHow many amps does a 9,600 watt heater draw at 240V?
Power formula fundamentals (P = E x I)
Solve it with meThese patterns come straight from the calculation families the state exams test. Want to know which ones would cost you points? Take the free 15-minute practice test and get your list in priority order.