BlueprintExercises

Electrical drawings

Read control circuits and wiring the way electricians and maintenance techs do. Pick US (ANSI/IEEE, NEC, NFPA 79) or IEC in any exercise.

6 lessonsPractice testANSI/IEEE · IECCertificate with Pro

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0 of 7 doneStart lesson 1
  1. 1

    Electrical symbols

    Contacts, pushbuttons, coils, lamps, motors and basic components, in US (ANSI/IEEE) and IEC style.

  2. 2

    Contacts and control logic

    Normally open and normally closed, series and parallel: work out when a lamp lights.

  3. 3

    Device tags

    CR, PB, OL, LS on US drawings; -K, -S, -F, -M on IEC drawings.

  4. 4

    Wire colors

    Neutral, ground and hot conductors under the NEC, and the IEC 60445 colours used in Europe.

  5. 5

    Wire sizes: AWG and mm²

    Why a higher gauge number is a thinner wire, and how AWG sizes compare with metric cable sizes.

  6. 6

    Read a motor control circuitHarder

    A start/stop circuit with a seal-in contact, overload and pilot lamps. Five questions per drawing.

  7. Practice test20 questions

    Mixed questions from every lesson. Use it to check what you know.