Free Electrician Exam Practice Test – 2017 NEC

What is the demand factor applied in calculating feeder or service conductor load for a commercial kitchen having four electrical ovens?

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What is the minimum size THWN branch circuit conductor required for a 20 HP, 480-volt, 3 Phase Induction type squirrel cage motor with nameplate FLI of 26.5 amps?

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For a one-family dwelling with a 200 ampere, 120/240-volt, single-phase main service panel, supplied with size 2/0 AWG THW copper ungrounded service-entrance conductors in rigid metal conduit (RMC), what is the minimum allowed size of bonding jumper for the service-entrance conduit?

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On portable generators manufactured before __________, listed cord sets or adapters incorporating listed GFCI protection are allowed to be used to meet the GFCI requirement.

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What is the minimum size THW copper branch-circuit conductor required by the NEC for a 3-phase, continuous-duty, ac motor drawing 70 amperes for phase, when all terminations are rated for 75° C?

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Lighting and trolley busway must be installed __________ft. or more above the floor or working platform, unless a cover is provided that is identified for the purpose.

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Electrical nonmetallic tubing (ENT) shall be securely fastened in place within __________ of each cabinet, device box, fitting, junction box, or outlet box where it terminates.

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What is the minimum size for a copper grounding electrode conductor attached to the concrete-encased steel reinforcing bars used as a grounding electrode, when the ungrounded service-entrance conductors for a residence are size 3/0 AWG copper conductors?

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The material selected for a grounding electrode conductor should be protected from corrosion or resist any __________ condition extant at the installation.

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If the sum of PV system voltages of two monopole subarrays in a bipolar PV system exceeds the rating of the conductors and connected equipment, they must be__________.

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A location used to house four or more persons incapable of self-preservation due to age; mental limitations, mental illness or chemical dependency; or physical limitation due to accident or illness on a(n) __________ basis is a limited care facility.

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Grounding electrode conductor or bonding jumper connections to a grounding electrode must be accessible. A buried or encased connection in a __________, buried, or driven grounding electrode is not required to be accessible.

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What is the minimum rating for a service disconnecting means when supplied with a 120/240-volt, 3-wire, single phase service for a one-family dwelling?

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During lightning events, limiting the length of the primary protector grounding conductors for communications circuits assists in reducing voltage between the buildings communications systems and __________.

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For required disconnecting means for a fluorescent luminaire, which of the following statements is true?

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General-use dimmer switches shall be used only to control permanently installed _________ luminaries (lighting fixtures).

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On a metal wireway cross-section, what is the maximum percent that may be occupied by conductors, splices, and taps at any point?

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What is the minimum volume, in inches, required of a two (2) gang device box that is to contain two (2) size 14/2 AWG with ground NM cables and two (2) size 12/2 AWG with ground NM cables connected to a duplex receptacle connected to a single-pole switch, which also contain four (4) cable clamps?

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What is the minimum allowable trade size intermediate metal conduit (IMC) required to contain a total of ten (10) copper THW conductors in a 20 foot run, five (5) size 1 AWG and five (5) size 3 AWG?

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A test of the complete legally required standby system when installed must be conducted and witnessed by the:

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The minimum required size 75° C rated copper conductors for a demand load of 200 amperes when installed in an area with an expected ambient temperature of 120° F is __________.

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Which insulation gives conductors a greater ampacity when used in a dry location rather than a wet location?

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If a pole is over 8 ft. in height, a __________ terminal must be accessible from a handhole.

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Conductors, based on the __________°C temperature rating and ampacity as given in Table 310.60(C)(67) through Table 310.60(C)(86), may be terminated unless otherwise identified.

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For equipment rated 1200 amperes or more and over 6 feet wide that contain overcurrent devices, there shall be one entrance to and egress from the required working space not less than __________ inches wide and __________ feet high at each end of the working space.

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Free Electrician Exam Practice Test - 2017 NEC
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