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Master Electrician Practice Test
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The Master Electrician exam in most electrical licensing examinations covers these topics: Grounding and bonding, Overcurrent protection, Wiring methods and installation, Boxes and fittings, Services and equipment, Motors, Special occupancies, Load calculations, Lighting, Appliances, Box and raceway fill, Hazardous locations, Trade knowledge and Electrical theory.

Master Electrician Practice Test
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20 Questions

1. Where it is necessary to install more than one (1) ground rod used as a grounding electrode, the ground rods shall be spaced not less than _____ apart.
2. Given: You are to install an underground run of trade size 2 in. Schedule 40 PVC conduit containing 120/240-volt, single-phase service-entrance conductors supplying a one-family dwelling. The PVC will not cross under any public streets, roads, driveways or alleys. The conduit is to have a burial depth of at LEAST _____ from final grade.
3. The optional method of calculation for dwelling units is reserved for ___.
4. In order to determine the adequate size of a junction box containing size 4 AWG THWN copper conductors, the volume allowance, in cubic inches, required per conductor is _____.
5. The MAXIMUM distance conduit seals are permitted to be installed from an enclosure that houses devices that produces arcs or high-temperatures in a Class I, Division 1 location is _____.
6. As a general rule, switches not over 1,000-volts containing fuses and circuit breakers shall be readily accessible and installed so that the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than _____ above the floor more working platform.
7. In order to determine the adequate size of a junction box containing size 4 AWG THWN copper conductors, the volume allowance, in cubic inches, required per conductor is _____.
8. Where a transformer supplies a single-phase, 120/240-volt, 600 ampere service, the transformer should have a kVA rating of at least _____.
9. Where a transformer supplies a single-phase, 120/240-volt, 600 ampere service, the transformer should have a kVA rating of at least _____.
10. When calculating the service-entrance conductors of a farm where all the buildings, including the dwelling, are supplied from a common service, the second largest individual load in the group shall be calculated at _____.
11. Metal conduit installed in indoor wet locations must have a minimum airspace clearance of _____ between the conduit and the wall or supporting surface.
12. Calculate the minimum demand load, in amperes, on the ungrounded service-entrance conductors for a recreational vehicle park that has 28 RV sites all with 50-ampere outlets at each RV site. Supply system is single-phase, 120/240 volts.
13. Where the sole support of an outdoor installed Type FS box that contains devices or supports luminaires is two (2) underground buried threaded intermediate metal conduits (IMC) or rigid metal conduits (RMC) that emerge from ground, the NEC requires the box to be no more than _____ from the point where the conduit emerges from the ground.
14. The optional method of calculation for dwelling units is reserved for ___.
15. Where three (3) switches are grouped or ganged in an outlet box without permanent barriers, the voltage between the adjacent switches shall NOT exceed _____.
16. Underground service conductors of not over 1,000-volts that are not encased in concrete and that are buried 18 inches or more below grade, shall have their location identified by a warning ribbon that is placed in the trench at least _____ above the underground installation.
17. As a general rule regarding solar photovoltaic (PV) systems, supply-side conductor connections for PV systems must terminate in an overcurrent protection device that's within no more than ___ of the point of interconnection to the local electric utility.
18. Where size 2 AWG THWN/THHN copper conductors, protected by a 100 ampere rated circuit breaker, are enclosed in a Schedule 40 PVC conduit to supply an air-conditioning unit, what is the MINIMUM size copper equipment grounding conductor required for this installation?
19. Given: You are to install four (4) size 350 kcmil THWN copper conductors in a run of rigid metal conduit (RMC). What is the MINIMUM trade size RMC required to enclose the conductors for this installation?
20. Where three (3) switches are grouped or ganged in an outlet box without permanent barriers, the voltage between the adjacent switches shall NOT exceed _____.

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