Download NYC Master Electrician Exam: Questions and Answers for 2025 and more Exams Electrical and Electronics Engineering in PDF only on Docsity!
NYC MASTER ELECTRICIAN EXAM Latest 2025
Graded A+
Type is multiconductor cable identified for use as underground service entrance cable. - ✔✔Type USE cable Knife switch rated for more than 1200 Amps at 250Volts or less - ✔✔Can be used only as isolating switch, shall not be opened under load Track lighting with outlets in a bathroom is not allowed because? - ✔✔Track lighting has receptacle Where internal combustion engines are used as the prime motor, an on site fuel supply shall be provided with an on premise fuel supply sufficient for not less than hours full demand operation of the system - ✔✔6 hours Fixed in place X-ray equipment properly supplied by a branch circuit rated at not over amperes shall be permitted to be supplied through a suitable attachment plug cap and hard service cable cord. - ✔✔30 Amps Where skin effect exist the ferromagnetic envelope shall be bonded at. - ✔✔Both ends GFCI protection at a carnival is not required for equipment at circuit if the receptacle is of the type. - ✔✔Locking The maximum voltage drop from service point to the last over-current device in a dwelling unit?
- ✔✔4% Which of the following statements best describe the grounding requirement for central vacuum outlet - ✔✔Accessible non current carrying metal parts are required to be connected to an equipment grounding conductor.
In healthcare facilities, patient bed receptacles located in general care areas shall be supplied by at least two branch circuits, which permitted to originate from two separate transfer switches on the emergency system - ✔✔Are permitted Patient care areas of healthcare facilities areas such as business offices, corridors, lounges ,day rooms, or similar areas - ✔✔Do not include The patient care area is any portion of the healthcare facility where patients are intended to be or. - ✔✔Examined or treated Each general care area patient bed location in a healthcare facility must be provided with four or duplex receptacles - ✔✔Single or two A hospital is a building or portion thereof used for medical, psychiatric,obstetrical , or surgical, care on a 24 hour basis of or more patients - ✔✔Four Where installed to reduce electrical noise for electronic equipment, electrical continuity of the metal raceways shall not be required and metal raceway can terminate a (an) nonmetallic fitting or spacer on electronic equipment - ✔✔Listed fitting Feeder and branch circuit conductors within inches of a Ballast shall have an insulation temperature rating not lower than 90°C (194°F) unless supplying a luminaiere marked as suitable for a different insulation temperature - ✔✔3 inches Manufactured wiring systems constructed with type MC cable shall be supported and secured at intervals not exceeding ft. - ✔✔6 ft Where a main bonding jumper or a system bonding jumper is a screw only the screw shall be identified with a that shall be visible with the screw installed - ✔✔Green finish
Type fuse adapters shall be designed so that once inserted in a fuse holder that cannot be removed - ✔✔Type S fuse Service drops Installed over roof shall have a vertical clearance of above the roof surface, and unless a lesser distance is permitted by and exceptions - ✔✔8'ft Class 2 and Class 3 circuits shall not be placed in any enclosure, raceway, cable, or similar fittings with conductors of Class 1 or electric light or power conductors, unless. - ✔✔Separated by barrier In the critical care areas of health care centers, each patient bed shall be provided with a minimum of duplex receptacles - ✔✔3 duplex (6 single) The equipment system shall supply major electric necessary for patient care and basic hospital operation - ✔✔Equipment The essential electrical system in a healthcare facility shall be compromised of the - ✔✔emergency system and the: equipment system Locations were flammable anesthetics are employed are class I,Division I locations that shall extend - ✔✔upwards to a level 5'ft above the floor In a healthcare facility receptacles and attachment plugs in a hazardous (classified) location with an anesthizing area shall be listed for use in class I group locations - ✔✔Group C In anesthetic,areas health care equipment frequently in contact with bodies of persons shall not exceed volts. - ✔✔10 Volts In anesthetic areas, low-voltage equipment that is frequently in contact with the bodies of persons or has exposed current-carrying elements shall - ✔✔operate on an electrical potential of 10 volts or less,be moistur- resistant, be approved as intrinsically safe or double-insulated equipment.
In a healthcare facility, the maximum internal current permitted to flow through a line isolated monitor,when any point of the isolated system is grounded, shall be. - ✔✔ 1 milliamperes Transfer eguipment, including automatic transfer switches,shall be - ✔✔automatic, identified for emergency use , approved by the authority having jurisdiction Automatic transfer switches shall be operated and held - ✔✔Electrically operated and mechanically Audible and visual signal devices for an emergency system shall be provided,where practicable, for the purpose(s) of indicating that - ✔✔the battery is carrying load, derangement of emergency source, that the battery charger is not functioning Wiring from an emergency source to emergency loads shall of all other wiring - ✔✔Be kept entirely independent of all other wiring Emergency circuit wiring shall be permitted to enter which of the following types of equipment with normal circuit wiring? - ✔✔Transfer switches, exit or emergency luminaries supplied from two sources Emergency circuit wiring must be designed and located in such a manner so as to minimize the possibility of failure because of , ,. - ✔✔Vandalism,flood,fire. Emergency lighting emergency power or both must be available in the building within a time not exceeding seconds - ✔✔10 seconds A storage battery supplying emergency lighting and power shall maintain not less than 87.5% of full fault is that total low for a period of at least 1.5 hours - ✔✔
Type 3 surge protective devices can be installed on the load side of a branch circuit overcurrent device up to the equipment served. If included in the manufacture's instructions, the type 3 SPD connection must be a minimum 30ft. Of conductor distance from the service or separately derived system disconnect - ✔✔ Access opening in a manhole shall be not less than 26" - ✔✔ In a dwelling unit which appliance is allowed to have a 24" cord with attachment ground plug? Combination range hood/Microwave - ✔✔ Knife switches rated for more than 1200 amps at 250v or less, can be used only as isolating switch, shall not be opened under load. - ✔✔ Two or more 20A small appliance branch circuits shall be provided to supply power for receptacles outlets in the dwelling unit kitchen,dining room,breakfast room, pantry, or similar dining areas - ✔✔ At least one 125v, single phase, 15A or 20A, duplex receptacle shall be provided in the elevator hoistway pit. - ✔✔ The feeder and branch circuit overcurrent devices shall be accessible by? Authorized persons only - ✔✔ Receptacle outlet in floor shall not be counted as part of the required number of receptacle outlets unless located within 18" of the wall - ✔✔ A door used by personnel to exit the work space that is less than 25' feet from the working space shall, swing outward with simple pressure. - ✔✔ Cables with entirely nonmetallic sheath (ROMEX) shall be permitted to enter the top of a surface mounted enclosure through one or more non flexible raceways not less than 18" - ✔✔
In straight pull, the length of the box shall not be less than 8 times the trade size of the largest raceway. - ✔✔ A separate branch circuit shall supply the elevator hoistway pit lighting and receptacle. The required lighting shall not be connected to the load side of a ground-fault circuit interrupter. - ✔✔ What is true about installation of a Type 1 TVSS Can be connected to line side of service disconnect. - ✔✔ A load demand factor of 75% is permitted for four or more appliances fastened in place such as waste disposal, dishwashers, trash compactors, water heater, etc, - ✔✔ Which of the following statements best describes the grounding requirements for central vacuum outlet assemblies? Accessible non-current-carrying metal parts are required to be connected to an equipment grounding conductor. - ✔✔ Service drops installed over roofs shall have a vertical clearance of 8ft above the roof surface,unless a lesser distance is permitted by an exception - ✔✔ The maximum total voltage drop on branch-circuit conductors is 3% percent. - ✔✔ Which of the following shall not be connected to the life safety branch in a hospital? General illumination - ✔✔ How many receptacles are required within the perimeter of a balcony, deck or porch with a useable area of less than 20 square FT. 1 - ✔✔ Branch circuit conductors within 3in. Of a ballast shall have an insulation temperature rating not lower than 90 degrees celsius (194 degrees Fahrenheit) - ✔✔
As per New York City NEC in addition to the number of branch circuits required in a dwelling unit an individual branch circuits shall be provided for each air conditioner receptacle. - ✔✔ Lighting truss shall not be installed less than 5ft above the finished floor except where protected from physical damage or where the track operates at less than 30V RMS, open- circuit voltage. - ✔✔ The conductors used to connect the surge protective device to the line or bus and to ground shall not be any longer than necessary and shall avoid unnecessary bends. - ✔✔ 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 B phase. - ✔✔ For phase converters serving variable loads, the ampacity of the single-phase supply conductors shall not be less than 125% of the single-phase input full-load amperes listed on the phase converter nameplate. - ✔✔ Alternating- current general-use snap switches are permitted to control- resistive and inductive loads that do not exceed the ampere and voltage rating of the switch, tungsten- filament lamp loads that do not exceed the ampere rating of the switch at 120V, motor loads that do not exceed 80% of the ampere and voltage rating of the switch - ✔✔ How many receptacle outlet are permitted on a 20A, 120V circuit in a commercial building? - ✔✔ 13 ENT and fitting can be encased in poured concrete, provided fitting identified for this purpose are used. - ✔✔ Where conductors of different system 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 white with colored stripe other than green or distinguished by other suitable approved means - ✔✔
Where angle or U pulls are made, the distance between each inside the box and the opposite wall of the box shall not be less than six times the trade size of the largest raceway in row. - ✔✔ Lighting system covered by Article 411 shall have a power supply rated not more than —— amps and not more than 30V. - ✔✔25 amps The demand factor for marina load calculations of 45 shore power receptacles is %. - ✔✔50% Which flexible cable is allowed to be used for a Electric Vehicle Charging Station? - ✔✔EVJ Communication circuits shall have a minimum grounding conductors of AWG. - ✔✔# AWG Lighting system operating at 30V or less shall not be installed within feet of pools, spas, fountains, or similar locations. - ✔✔10'ft The working space in front of the electric equipment shall not be less than inches wide, or the width of the equipment, whichever is greater. - ✔✔30" inches The minimum clearance for overhead feeder conductors not exceeding 600V that pass over commercial areas subject to truck traffic is feet. - ✔✔18" feet A limited care facility is an area used on a hour basis for the housing of four or more persons who are incapable of self-preservation because of age, physical limitation due to accident or illness, or mental limitations, mental illness, or chemical dependency. - ✔✔24hr For equipment rated 1200A or more and over 6ft wide that contains over-current devices, switching devices, or control devices, there shall be one entrance to and egress from the required working space not less than 24inches. Wide and nches high at each end of the working space. - ✔✔6'foot 6"inches (78" inches)
Service conductors installed as unjacketed multi-conductor cable shall have a minimum clearance of 3'ft from windows that are designed to be opened, doors, porches, stairs, fire escapes, or similar locations. - ✔✔ A hospital is a building or portion there of used for medical, psychiatric, obstetrical, or surgical care, on a 24-hour basis, of four or more patients - ✔✔ The dimensions of working space for access to live parts operating at 300V, nominal to ground, where there are exposed live parts on both sides of the workspace is feet. - ✔✔4' feet Where conductors or cables are installed in conduits exposed to direct sunlight on or above rooftops, the ambient temperature shall be increased by 60F where the conduits are less than 1/2"inch from the rooftop. - ✔✔ What is the feeder or service calculated load for a waste disposal (940VA),dishwasher (1250VA), a trash compactor (1100VA), and a water heater (4500VA)? 5843VA - ✔✔ Exposed live parts of motors and controller operating at Volts or more between terminals shall be guarded against accidental contact by enclosure or by location. - ✔✔50Volts The authority having jurisdiction has the responsibility for making interpretations of rules, for deciding upon the approval of equipment and materials, for waiving specific requirements in the code permitting alternate methods and materiel if safety is maintained. - ✔✔ 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 inches and not more than ft. - ✔✔24"inches and not more than 4'feet In NEC, the words " , indicate a mandatory requirement. - ✔✔"Shall, Shall Not"
When the code uses the words " be " it means the identified actions are allowed but not required, and they may be options or alternative methods. - ✔✔"Shall be Permitted" For switchboard that are not totally enclosed, in a space of "inches or more shall be provided between the top of the switchboard and any combustible ceiling. - ✔✔36"inches (3ft) Overhead feeder conductors shall have a minimum feet vertical clearance over residential property and driveways, as well as those commercial areas not subject to truck traffic, where the voltage is limited to 300V to-ground. - ✔✔12'feet Class 2 and Class 3 circuits shall not be placed in any enclosure, raceway, cable, or similar fittings with conductors of Class 1 or electric light or power conductors, unless .
- ✔✔Separated by barrier The feeder conductor ampacity shall not be less than that of the service-entrance conductors with an ampacity of Amps or less - ✔✔50Amps or less Where cables or nonmetallic raceways are installed through bored holes in joist, rafters, or wood members, holes shall be bored so that the edge of the hole is not less than from the nearest edge of the wood member. - ✔✔1 and 1/4"inch Equipment installed in hazardous (classified) locations shall be marked to show the Class, group, temperature class (T Code) or operating temperature at a 40C or 104F ambient temperature. - ✔✔ Which of the following statements best describes the grounding requirements for central vacuum outlet assemblies? Accessible non current carrying metal parts required to be connected to an equipment grounding conductor. - ✔✔ Where installed to reduce electrical noise for electronic equipment, electrical continuity of the metal raceway shall not be required and the metal raceway can terminate to a listed non metallic fitting or spacer on the electronic equipment. - ✔✔
The minimum radius of a field bend on trade size 1 1/4 RMC is 8 - ✔✔ Open conductors shall be supported on glass or porcelain knobs, racks, brackets, or stain insulators - ✔✔ Type S fuse adapters shall be designed so that once inserted in a fuse holder they can not be removed. - ✔✔ 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? 6ft - ✔✔ The connection of the system bonding jumper for a separate derived system shall be made at any single point on the separately derived system from the source to the first system disconnecting means or over-current device. - ✔✔ The authority having jurisdiction, shall conduct or witness an acceptance test of the complete emergency system upon installation and periodically afterward. - ✔✔ For a portable motor rated at 1/3hp or less, the controller shall be permitted to be an attachment plug and receptacle. - ✔✔ A separation of at least ft shall be maintained between communication wires and cables on buildings and lighting conductors, where practicable. - ✔✔6'ft Type is a multiconductor cable identified for use as underground service-entrance cable. - ✔✔USE Fixed in place X-ray equipment properly supplied by a branch circuit rated at not over Amps shall be permitted to be supplied through a suitable attachment plug cap and hard service cable or cord. - ✔✔30Amps
When service disconnecting means is a power-operated switch or circuit breaker, it shall be able to be opened by hand in the event of a —— —— ——. - ✔✔power supply failure. Open wiring on insulator is a wiring method using cleats, knobs, and flexible tubing for protection and support of single insulated conductors run in or on buildings. - ✔✔Permanent Inverse time is a term indicated that is an intentional delay in the tripping action of the circuit breaker, which decreases as the magnitude of the current increases. - ✔✔ An insulated grounded conductor of 6AWG or smaller shall be identified by a continuous white or gray outer finish, or by three continuous white stripes on other than green insulation along its entire length. - ✔✔ Equipment associated with the electrical installation can be located above or below other electrical equipment within their working space when the associated equipment does not extend more than 6'inches from the front of the electrical equipment. - ✔✔ How many receptacle are required within the perimeter of a balcony, deck or porch with a usable area of less than 20 SQ.ft. One - ✔✔ The minimum headroom of working spaces about motor control center is 6 1/2ft. - ✔✔ At least one entrance to enclosures for electrical installations shall not be less than 30 inches wide and 6ft high shall be provided to give access to the working space around the electrical equipment over 600V nominal. - ✔✔ What is the minimum height for a vertical overhead clearance for a service drop conductors over residential property and driveways with garage, not subject to truck traffic where the voltage does not exceed 300V. 12"ft - ✔✔
Conductors on poles shall have a separation of not less the 1 foot where not placed on racks or brackets. Conductors support on poles shall provide a horizontal climbing space not less than the following:Power conductors below communication conductors 30"inches. - ✔✔ A service switchboard sized over 5000A with a 100% rating shall have copper bus bars sized on an ampacity of 700'ft per square inch. - ✔✔ For installations other than enclosed equipment accessible to unqualified persons, a wall, screen, or fence shall be used to enclose an outdoor electrical installation to deter access by persons who are not qualified, the height of the fence should be in total of 8'ft. - ✔✔ What is the total resistance of a circuit consisting of two, 8MFD capacitors connected in series at 60HZ? 663 ohms - ✔✔ What is the weight in lbs., of. Manhole cover that is used to keep out unqualified persons from accessible to opening the manhole? Over 100lbs - ✔✔ Where communication wires and cables and electric light or power conductors are supported by the same pole and are run paralleled to each other in span, the supply service drops of 0- 750V running above and parallel to communications service drops shall have a minimum separation of 12"inches at any point in the span, including the point of and at their attachment to the building, provided the nongrounded conductors are insulted and that a clearance of not less than 40"inches is maintained between the two services at the pole. - ✔✔ Communication wires and cables shall have a vertical clearance of not less than 8'ft from all points of roof above which they pass. - ✔✔ MV (multi voltage) cable rated can not be installed in : Cable tray - ✔✔ When three resistors are connected in series, an amperage of ten amp is achieved. When an equal resistor is connected in parallel with the existing three resistors the ampere reading will?
How many switches will be needed to control a light fixture from five different locations? - ✔✔ 2 - 3 ways and 3 - 4 ways The grounding of communication wires should be run to the grounding electrode: in a straight line - ✔✔ Service lateral conductors that supply power to limited loads of a single branch circuit such as a small polyphase power, controlled water heater, and similar loads shall not be smaller than 8AWG copper. - ✔✔ Each general care area patient bed location shall be provided with a minimum of 4 receptacles which can be single, duplex, or a combination of both. - ✔✔ Dry type transformer installed indoors rated over 35KV shall be installed in a vault. - ✔✔ Flat top underfloor raceways over 4 inches, but less 8 inches wide, with a minimum 1 inch spacing between raceway, shall be covered with concrete to a depth of not less than 1 inch. Raceway spaced less than 1 inch apart shall be covered with a concrete to a depth of 1 1/2"inches. - ✔✔ For straight pulls, the length of a pull box shall not be less than 8 times the outside diameter, over the sheath, of the largest shielded or lead covered conductors or cable entering the box on system over 600V - ✔✔ For switchboard that are not totally enclosed, a space of 36"inches or more shall be provided between the top of the switchboard and any combustible ceiling. - ✔✔ A disconnecting means that serves a hermetic refrigerant motor compressor shall have an ampere rating of at least 115% of the nameplate rated load current to branch circuit selection current, whichever is greater. - ✔✔
