2020 E2 Commercial Electrical Inspector Exam Quiz Welcome to your free 2020 E2 Commercial Electrical Inspector Exam Quiz REQUIRED - Enter your email address and receive a printable copy of your test results. 1. For ranges of 8-3/4 kW or more rating, the minimum branch-circuit rating shall be __________ amperes. 10kW 20kW 40kW 50kW 2. General lighting in dwelling units is required to have a unit load of at least __________VA 1 2 3 4 3. When calculating a general load, it must be at least __________ percent of the first 10 kVA, added to __________ percent of the remaining loads. 70, 100 80, 70 90, 50 100, 40 4. What is the maximum distance between secure fastenings for electrical nonmetallic tubing (ENT)? 3 feet 4 feet 6 feet 10 feet 5. The length of cord for electrically operated kitchen waste disposers shall not be less than __________ inches and not over __________ inches. 12, 24 15, 30 18, 36 24, 48 6. For wet-niche underwater pool luminaires, which of the following listed conduits are allowed to enclose the conductors? electrical metallic tubing (EMT) electrical nonmetallic tubing (ENT) galvanized rigid metal conduit (RMC) Schedule 40 rigid polyvinyl chloride conduit (PVC) 7. The connection point between the premises wiring and the serving utility facilities is called the __________ . Meter Base Meter Socket Power Entrance Service Point 8. What is the maximum rating allowed of any one cord-and-plug-connected appliance not fastened in place connected to a 20-ampere branch circuit? 10 amperes 16 amperes 20 amperes 25 amperes 9. What are the maximum number of switch(es) or set(s) of circuit breakers allowed for service disconnecting means for each residential service? 2 4 6 8 10. Conductors of size 1/0 AWG and larger, made of aluminum, copper, or copper-clad aluminum, comprising each phase, polarity, neutral, or grounded circuit conductor, are allowed to be connected in __________ . NOTE: (electrically joined at both ends. | Code Exceptions ignored.) delta parallel series wye 11. As a method to __________ for thermal expansion and contraction, raceways must have expansion fittings where necessary. calculate compensate provide enhancement provide restriction 12. The tightest bend allowed by the NEC for Type NM cable is a radius of how many times the diameter of the cable? five six seven eight 13. What is the current flow of a 3kW heat strip connected to 120 volts ac power supply? 2.5 amperes 4 amperes 25 amperes 40 amperes 14. If a dwelling has a 2000 sq. ft. floor area, not counting an unfinished attic, unfinished cellar not adaptable for future use, and open porches, a 12-kW range, a 5-kW clothes dryer, a 4.5-kW water heater, a 2-1/2 ton (24-A) heat pump with 15 kW of backup heat, and a 1.2-kW dishwasher, what are the VA units for the total heating and cooling load? 5,760 10,225 15,510 20,760 15. Service equipment for floating structures and submersible electrical equipment that is located on land must be at least how far horizontally from the shoreline? 5 feet 6 feet 10 feet 12 feet 16. What is the minimum rating allowed for 120/240 volt, single-phase service equipment for a mobile home? 50 amperes 75 amperes 100 amperes 150 amperes 17. What is the full-load running current rating of a 30 hp, 480-volt, 3-phase wound-rotor, ac motor? 27 amperes 32 amperes 40 amperes 50 amperes 18. A household-type appliance with surface heating elements shall have its power supply subdivided into two (2) or more circuits if the maximum demand is over __________ . 30 amperes 40 amperes 50 amperes 60 amperes 19. Type MC cables containing four or fewer conductors, sized no larger than 10 AWG, shall be secured within __________ inches of every box, cabinet, fitting, or other cable termination. 6 inches 9 inches 12 inches 15 inches 20. For a 50-ampere branch circuit with conductors installed in PVC conduit, what is the minimum size copper equipment grounding conductor? 6 AWG 8 AWG 10 AWG 12 AWG