2017 E2 Commercial Electrical Inspector Exam Quiz Welcome to your free 2017 E2 Commercial Electrical Inspector Exam Quiz REQUIRED - Enter your email address to receive a printable copy of your test results. 1. What is the demand factor applied in calculating feeder or service conductor load for a commercial kitchen having four electrical ovens? 75% 80% 90% 100% 2. 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? 6 AWG 8 AWG 10 AWG 12 AWG 3. 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? 0/1 AWG copper 2 AWG copper 4 AWG copper 6 AWG copper 4. With 15-kW or less on portable generators manufactured before __________, listed cord sets or adapters incorporating listed GFCI protection are allowed to be used to meet the GFCI requirement. January 1, 2005 January 1, 2011 January 1, 2014 January 1, 2015 5. 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? 3 AWG 4 AWG 5 AWG 6 AWG 6. Lighting and trolley busway must be installed __________ . or more above the floor or working platform, unless a cover is provided that is identified for the purpose. 6' 8' 10' 12' 7. 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. 12 inches 18 inches 24 inches 36 inches 8. 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? 2 AWG 4 AWG 6 AWG 8 AWG 9. The material selected for a grounding electrode conductor should be protected from corrosion or resist any __________ condition extant at the installation. below freezing corrosive high temperature moisture 10. 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 __________ . connected joined separated together 11. 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. 8 hour or less per day 12 hour 24 hour temporary 12. 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. concrete encased electrical metallic tube electrical flexible tube rigid metallic tube 13. 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? 60 amperes 100 amperes 120 amperes 200 amperes 14. 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 __________ . fire alarm lighting lighting Protection power 15. For required disconnecting means for a fluorescent luminaire, which of the following statements is true? Disconnecting means shall simultaneously break all supply conductors to the ballast. The disconnecting means shall be external to the luminaire. The disconnecting means shall not be external to the luminaire. Ungrounded conductor disconnects from multi-wire branch circuits. 16. General-use dimmer switches shall be used only to control permanently installed __________ luminaries (lighting fixtures). compact fluorescent fluorescent halogen incandescent 17. On a metal wireway cross-section, what is the maximum percent that may be occupied by conductors, splices, and taps at any point? 40% 50% 75% 80% 18. 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? 28 cubic inches 30 cubic inches 34 cubic inches 36 cubic inches 19. A test of the complete legally required standby system when installed must be conducted and witnessed by the __________ . authority having jurisdiction electrical engineer manufacturer's representative qualified person 20. 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? 1 1/2 in 2 in 2 1/2 in 3 in