Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
MASTER ELECTRICIAN EXAM 2026-2027 QUESTIONS AND ANSWERS GRADED A+
Typology: Exams
1 / 31
This page cannot be seen from the preview
Don't miss anything!
The specific resistance of copper wire @ 20° C in ohms per circular mil ft. is permit current to flow Conductance of an electric circuit is that property that will: 1O ohms The equivalent value of 0.1 mho is directly proportional to its length The resistance of copper wire is: Feeder The portion of a wiring system between a point of distribution and the branch circuit overcurrent device is
locking GFCI protection at a carnival is not required for equipment at circuit if the receptacle is of the ____________type not less than 1 1/4 in. from Where cables or nonmetallic raceways are installed through bored.holes in joists, rafters, or wood members;holes shall be bored so that the edge of the hole is the nearest edge -of the wood member. located on a balcony accessible only to qualified persons located in a room only accessible to qualified persons elevated 8 ft or more above floor or other working surface To guard live parts over 50V but less than 600V, equipment is permitted to be 12Ft Overhead feeder conductors shall have a minimum __________ vertical clearance over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage is limited to 300 volts-to-ground. 36 inches
Ground-fault protection of equipment shall be provided fro solidly grounded wye electrical services of more than 150 volts-to-ground, but not exceeding 600V phase-to..phase for each service disconnecting means rated 18" Receptacle outlets in floors shall not be counted as part of the required number of receptacle outlets unless located within ______ of the wall branch circuit That portion of a wiring system extending beyond the final overcurrent device is called the: Calculated load The final sum of the computed loads, based on the minimum code requirements, is the Resistance As compared to #10, a #8 wire of the same Iength has less:
0.001 inch One circular mil is the area of a circle whose diameter is: 1,000,000 cm A round bus-bar one inch in diameter, has a circular mil area of: four times as great A copper wire with twice the diameter of another wire has a current carrying capacity: 50V Exposed live parts of motors and controllers operating at or more between terminals shall be guarded against accidental contact by enclosure or by location 5' Lighting track shall not be installed less than______ above the finished floor except' where protected from physical damage or where the track operates at less than 30 V rms, open-circuit voltage 4
Lighting systems operating at 30V or less shall not be·installed within_______of pools, spas, fountains, or similar locatipns 12 / Where communications wires and cables and electric light or power conductors are supported by the same pole and are run paralled to each other in span , the·supply service drops of 0-750 volts running above and parallel to communications service drops shall have a minimum separation of _______inches at any point in the span, including the point of and at their attachment to the building, provided the nongrounded conductors are insulated and that a clearance of not less than_______ inches is maintained between the two services at the pole 8 Communications Wires and cables shall have a vertical clearance of not less the ______feet from all points of roofs above which they pass. Cable Tray MV cable rated 35 KV cannot be installed in in a straight line
The grounding of communications wires should be run to the grounding electrode: 10 AWG Copper Service Lateral conductors that supply power to limited loads of a single branch circuit-such as a small polyphase power, controlled water heaters, and similar loads-shall not be smaller than 35KV Dry type transformers installed indoors rated over._______ shall be installed in a vault. 1 1/2" Flat:top underfloor raceways over 4 inches, but less 8 inches wide, with a minimum 1 inch spacing between raceways, shall be covered with concrete to a depth of not iess than 1 inch. Raceways spaced less that 1 inch apart shall be covered with a concrete to a depth of 48 times For straight pulls, the length of a pull box shall not be less than _____ time the outside diameter, over the sheath, of the largest shielded ·or lead covered conductor or cable entering the box on systems over 600 volts
6 feet A separation of at least ______shall be maintained between communications wires and cables on buildings and lightning conductors, where practicable Not Allowed in NYC When mounting a light fixture supported be EMT over a hot tub protected by GFCI must have a height of 12 How many # 10 conductors can be legally installed in a 4 inch square box, 2 1/ deep? 6 When installing receptacle around the pool they should be set back from the inside walls of not less than ______feet shall not be opened under load can be used only as isolating switch Knife switches rated for more 1200 amps at 250v or Less ______
outlets may be installed in a dwelling unit for specific appliance such as laundry equipment What is the maximum distance allowed between this outlet and the appliance? white or gray When leads are supplied with lamp holders the conductor attached to the screw shell shall have a _______finish. 25' A 125-volt, single-phase, 15- or 20- ampere-rated receptacle outlet shall be installed at an accessible location for the servicing of heating, air conditioning, and refrigeration equipment The receptacle shall be located on the same level and within ______of the heating, air-conditioning, and refrigeration equipment The receptacle outlet shall not be connected to the load side of the equipment disconnecting means 12 feet The verticaI clearance from ground level over a residential driveway for overhead service conductors not subject to truck traffic and are less than 300 volts to ground shall be _____ ft:
Type______ is a multi conductor cable identified for use as underground service- entrance cable Earth does not Carry significant current to open over current device A light post with no equipment ground. But there are two separate ground rods with 25 ohms to ground. What will happen if there is a ground fault? 18 feet The minimum clearance for overhead feeder conductors not exceeding 600V that pass over commercial areas Subject to truck traffic is. B Panel boards 'supplied by a three-phase; 4-wire, delta-connected system shall have the phase with higher voltage to ground (high-leg) connected to the phase Inverse time _______ is a term indicating that there is an intentional delay in the tripping action of the circuit breaker,
which decreases as the magnitude of the current increases 24" Outdoor electrical vehicle charging sites, unless specifically listed for the purpose and location, the coupling means of the electric vehicle supply equipment shall be stored or located at a height of not less than ______ and not more than 4ft. 4" Open conductors installed outside shall be separated from open conductors of other circuits or systems by not less than 180 VA For other than dwelling occupancies, banks, or office buildings, each receptacle outlet shall be calculated at not less than _____ VA. 12" For cord and plug connected electric vehicle supply equipment is used, the interrupting device of a listed personnel protection system shall be provided and shall be located in the power supply cable not more than ______from the attachment plug.
What is the minimum thickness of a transformer vault floor made up with bricks or cement filled blocks 30" What is the min Horizontal Climbing Space on a power conductors below communication conductors 125% Branch circuit conductor that supply a single motor used in a continuous duty application shall have an ampacity of not less than Percent of the motors full-load current 5/ Where service equipment totaling 1000 KVA, or larger is installed separately, or as part of a switchboard, the room in which such switchboard is located shall be constructed of noncombustible materials having a two hour fire rating and shall be of dimensions adequate to house the switchboard and to provide the following minimum clearances: At least _____Feet in front of the switchboard if if is in one line, and at least_______ Feet in front of the board if boards are installed facing each other
Over 100 Lbs What is the weight in lbs, of a manhole cover that is use to keep out unqualified persons from accessible to opening the manhole? One How many receptacles are required within the perimeter of a balcony, deck or porch with a useable area of less than 20 SQ. feet 26" Access openings in a manholes shall be not less than: 700 A service switchboard sized over 5000 amps with a 100% rating shall have copper bus bars sized on an ampacity of _____per square inch 1200 Amperes
The dimensions of working space for access to live parts operating at 3OOV, nominal to ground, where there are exposed live parts on both sides of the work space is 3.5 Feet The required working space for access to live parts operating at 300 volts to ground, where there are exposed live parts on one side and grounded parts on the other side is. white with colored stripe other than green or distinguished by other suitable approved means Where conductors of different systems are installed in the same raceway, one system shall have a neutral having an outer covering of white or natural gray and each other system having a neutral shall have another covering of Orange On a 4-Wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or bus bar having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is in ______ color or by other effective means. Such identification shall be placed at each point on the system where ·a connection is made if the grounded conductor is also present. 50'
Where this code specifies that one equipment shall be "in sight from", "within sight from" or ''within sight of', and so forth, another equipment, the specified equipment is to be visible and not more than ______ distant from the other 36" Where rear access is required to work on de-energized parts on the back of enclosed equipment, a minimum working Space of _______horizontally shall be provided two The number of receptacle outlets for guest rooms in hotels and motels shall not be less than that required for a dwelling unit These receptacles can be located to be convenient for permanent furniture layout but at least _____receptacle outlets shall be readily accessible Refrigerator or Electric Clock A receptacle connected to one of the dwelling unit small applicance branch circuits can be used to supply an _______ in any of the rooms specified in 210.52(B)(l) 50%
