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NEC Article 430 Lookup Practice (California Electrician Exam)

Article 430 spreads a single motor answer across four places, and candidates pick the wrong one under the clock. Anchor four sections and most motor questions become a sorting exercise.

Last reviewed June 2026

What to train

  • Table 430.248 (single-phase) versus Table 430.250 (three-phase) for full-load current.
  • 430.22: branch-circuit conductors at 125 percent of the table current.
  • 430.32: overload sized off the nameplate full-load amps.
  • Table 430.52: maximum short-circuit and ground-fault device by motor type.

What slows candidates down

  • Using the nameplate for conductors or the table for overload.
  • Hunting for one 'motor' number when 430 spreads the answer across four places.
  • Missing that 430.6 tells you to use the table, not the nameplate, for conductor and short-circuit sizing.
  • Not knowing the disconnect and controller rules have their own Parts.

Mini drill: find it fast

Close the book. Read each cue, say the index keyword you would search and the article out loud, then check yourself. If it takes more than fifteen seconds, that one goes on your tab list.

  • Full-load current of a three-phase motor

    Table full-load current by horsepower and voltage.

    Keyword: Motors, full-load current

    Table 430.250

  • Size motor branch-circuit conductors

    125 percent of the table full-load current.

    Keyword: Motors, conductors

    430.22

  • Motor overload setting

    A percentage of the nameplate full-load amps.

    Keyword: Motors, overload

    430.32

  • Maximum branch-circuit protective device

    Percent of full-load current by device and motor type.

    Keyword: Motors, short-circuit protection

    Table 430.52

  • Motor disconnect rating

    Disconnect rated at least 115 percent of full-load current.

    Keyword: Motors, disconnecting means

    430.110

Train this against the clock

Codebook speed timerTime your lookupsWhat you can bringProvided referencesFree diagnostic15 questions, no signup
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If you failed it onceThe 60-day wait is the work window. Find your two weakest domains and attack those, not a re-read of what you already knew.Build a retake planIf you’re still checking the rulesWhat’s provided at the test center, the 8,000 hours, C-10 vs General Electrician. Get the current facts before you study the wrong thing.Check the requirementsIf codebook speed is the weak spotReferences are provided, so the exam rewards whoever finds the rule fastest. Train the lookup, not just the rule.Train codebook speed
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