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CORRECT AND VERIFIED SOLUTIONS.
NYC MASTER ELECTRICIAN EXAM 230
CORRECT AND VERIFIED SOLUTIONS.
Type ____ is multiconductor cable identified for use as underground service entrance cable. - ANSWER-Type USE cable Knife switch rated for more than 1200 Amps at 250Volts or less - ANSWER-Can be used only as isolating switch, shall not be opened under load Track lighting with outlets in a bathroom is not allowed because? - ANSWER-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 - ANSWER-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. - ANSWER-30 Amps Where skin effect exist the ferromagnetic envelope shall be bonded at ____. - ANSWER-Both ends GFCI protection at a carnival is not required for equipment at circuit if the receptacle is of the ____type. - ANSWER-Locking The maximum voltage drop from service point to the last over-current device in a dwelling unit? - ANSWER-4% Which of the following statements best describe the grounding requirement for central vacuum outlet - ANSWER-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 - ANSWER-Are permitted Patient care areas of healthcare facilities ____ areas such as business offices, corridors, lounges ,day rooms, or similar areas - ANSWER-Do not include The patient care area is any portion of the healthcare facility where patients are intended to be ____or ____. - ANSWER-Examined or treated
CORRECT AND VERIFIED SOLUTIONS.
Each general care area patient bed location in a healthcare facility must be provided with four ____ or ____ duplex receptacles - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-3 inches Manufactured wiring systems constructed with type MC cable shall be supported and secured at intervals not exceeding ____ ft. - ANSWER-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 - ANSWER- Green finish Plug fuses a 15 amperes and lower rating shall be identified by a ____ configuration of the window, cap, or other prominent part to distinguish them from fuses of higher ampere rating - ANSWER-Hexagon The load for household electric clothes dryer's in a dwelling unit(s) shall be either ____ watts (volt-amperes) or the nameplate rating, which ever is larger, for each dryer served ? - ANSWER-5000 watts Service conductors installed as unjacketed multiconductor cable shall have a minimum clearance of ____ windows that are designed to be opened, doors, porches, stairs fire escape or similar locations. - ANSWER-3 ft (36 inches) —— Cartridge fuses of the renewable type shall be permitted to be used only for replacement in existing installation is where there is no evidence of over-fusing or tampering. - ANSWER-Class H Branch circuit conductors within ____inches of the ballast shall have an insulation temperature rating not lower it 90°C 194°F - ANSWER-3" inches The minimum radius of a field bend on trade size 1 "1/4 RMC is ____. - ANSWER- 8
CORRECT AND VERIFIED SOLUTIONS.
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 ____. - ANSWER-1 milliamperes Transfer eguipment, including automatic transfer switches,shall be - ANSWER- automatic, identified for emergency use , approved by the authority having jurisdiction Automatic transfer switches shall be ____ operated and ____ held - ANSWER- 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 - ANSWER-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 - ANSWER-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? - ANSWER-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 ____, ____, ____. - ANSWER- Vandalism,flood,fire. Emergency lighting emergency power or both must be available in the building within a time not exceeding ____seconds - ANSWER-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 - ANSWER- Where an internal combustion engine is used as the prime mover for the emergency system and on-site fuel supply shall be provided for not less than 6 hours of full-demand operation of the system - ANSWER- Unit equipment (battery packs) shall be on the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches - ANSWER- The alternate source for emergency systems shall not be required to have ground-fault protection of equipment with automatic disconnecting means - ANSWER- They equipment grounding terminal buses of the normal and essential branch-circuit panelboards serving the same individual patient care vicinity shall be connected
CORRECT AND VERIFIED SOLUTIONS.
together with an insulated continuous copper conductor not smaller than 10 AWG - ANSWER- Each patient bed location in critical care areas shall be supplied by at least 2 branch circuits. - ANSWER- Individual branch circuit shall not be required for portable mobile and transportable medical x-ray equipment requiring a capacity of not over 60 amperes - ANSWER- The ampacity of supply branch circuit conductors and the current rating of all the current protective devices for x-ray equipment shall not be less than 50 of the momentary rating or 100 percent of the longtime rating, whichever is greater - ANSWER- There shall be a minimum of one 20A branch circuit for laundry outlets required by 210.52(f) - ANSWER- Indoor 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 18"Inches and not more than 4'FT - ANSWER- 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 - ANSWER- Access opening in a manhole shall be not less than 26" - ANSWER- In a dwelling unit which appliance is allowed to have a 24" cord with attachment ground plug? Combination range hood/Microwave - ANSWER- 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. - ANSWER- 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 - ANSWER- At least one 125v, single phase, 15A or 20A, duplex receptacle shall be provided in the elevator hoistway pit. - ANSWER- The feeder and branch circuit overcurrent devices shall be accessible by? Authorized persons only - ANSWER-
CORRECT AND VERIFIED SOLUTIONS.
Dishwasher 1.50 kva Water Heater 4kw Dryer 4.50 kW Washing Machine 1.20 KVA Range 14.45 kw A/C (230V) 3hp A/C fan motor 1/8 hp (334) Heat 5kw - ANSWER- Which of the following are not permitted for the protection of equipment in electrical vaults? Stud walls covered with wallboard having a 3 hr rating - ANSWER- What is the maximum run length of a 18AWG fixture wire that is tapped on to a 20A branch circuit? - ANSWER-50' ft. Each general care area, patient bed location shall be provided with a minimum of four receptacles, which can be single, duplex, or a combination with each duplex counting as two receptacles. - ANSWER- AC or DC general use snap switches may be used for control of inductive loads not exceeding ____of the ampere rating of the switch at the applied voltage. - ANSWER- 50% According to the NEC, bare live parts are guarded from the public in the following methods except? Protected by fireproof curtain - ANSWER- 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. - ANSWER- 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. - ANSWER- 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. - ANSWER- 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. - ANSWER-
CORRECT AND VERIFIED SOLUTIONS.
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. - ANSWER- 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 - ANSWER- How many receptacle outlet are permitted on a 20A, 120V circuit in a commercial building? - ANSWER- 13 ENT and fitting can be encased in poured concrete, provided fitting identified for this purpose are used. - ANSWER- 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 - ANSWER- 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. - ANSWER- Lighting system covered by Article 411 shall have a power supply rated not more than ——amps and not more than 30V. - ANSWER-25 amps The demand factor for marina load calculations of 45 shore power receptacles is ____%. - ANSWER-50% Which flexible cable is allowed to be used for a Electric Vehicle Charging Station? - ANSWER-EVJ Communication circuits shall have a minimum grounding conductors of ____AWG. - ANSWER-#12 AWG Lighting system operating at 30V or less shall not be installed within ____ feet of pools, spas, fountains, or similar locations. - ANSWER-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. - ANSWER-30" inches
CORRECT AND VERIFIED SOLUTIONS.
In patient care areas, the grounding terminals of all receptacles and all non-current- carrying conductive surfaces of fixed electric equipments operating at over 600V, Likely to become energized, subject to personal contact. - ANSWER- 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. - ANSWER- 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 - ANSWER- 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.
- ANSWER-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. - ANSWER- 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 - ANSWER- 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. - ANSWER-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. - ANSWER- 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. - ANSWER- 24"inches and not more than 4'feet In NEC, the words "____, ____ ____ indicate a mandatory requirement. - ANSWER- "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. - ANSWER- "Shall be Permitted"
CORRECT AND VERIFIED SOLUTIONS.
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. - ANSWER-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. - ANSWER-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 ____ ____ ____. - ANSWER-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 - ANSWER-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. - ANSWER-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. - ANSWER- 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. - ANSWER- 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. - ANSWER- An insulated grounded conductor of #6AWG or smaller shall be identified by a continuous white or gray outer finish, or by three continuous white stripe on other than green insulated along its entire length - ANSWER- The required working space for access to live parts operating at 300V to ground, where there are exposed live parts on one side and grounded parts on the side is 3 1/2'ft - ANSWER- Open conductors installed outside shall be separated from open conductors of other circuits or systems by not less than ____inches. - ANSWER-4'inches To guard live parts over 50V but less than 600V, equipment is permitted to be located in a room only accessible to qualified persons, located on a balcony accessible only to
CORRECT AND VERIFIED SOLUTIONS.
A separation of at least ____ft shall be maintained between communication wires and cables on buildings and lighting conductors, where practicable. - ANSWER-6'ft Type ____ is a multiconductor cable identified for use as underground service-entrance cable. - ANSWER-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. - ANSWER-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 —— —— ——. - ANSWER-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. - ANSWER-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. - ANSWER- 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. - ANSWER- 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. - ANSWER- 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 - ANSWER- The minimum headroom of working spaces about motor control center is 6 1/2ft. - ANSWER- 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. - ANSWER-
CORRECT AND VERIFIED SOLUTIONS.
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 - ANSWER- Open conductors installed outside shall be separated from open conductors of other circuits or systems by not less than 36"inches. - ANSWER- What is the minimum thickness of a transformer vault floor made up with bricks or cement filled blocks? 6"inch (brick),8"inch(concrete) - ANSWER- Underground service conductors that are not encased in concrete and that are buried 30"inches or more below grade, shall have their location identified by a warning ribbon that is placed in the trench at least 12"INCHES above the underground installation for 40KV - ANSWER- Branch circuit conductor that supply a single motor used in a continuous duty application shall have a ampacity of not less than 125% of the motors full-load current. - ANSWER- Where service equipment totaling 1000KV, or larger is installed separately, or as part of a switchboard, the room in which such switchboard is located shall be constructed of non combustible materials having a two hour fire rating and shall be of dimensions adequate to house the switchboard and to provide the following minimum clearance: at least 5'ft in front of the switchboard if it is in one line, and at least 7'ft in front of the board if board are installed facing each other. - ANSWER- Where service equipment totaling 1000KVA, 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 clearance: At least 12"inches from the floor to any energized part of the switchboard, except by special permission. - ANSWER- Bending radius in type AC cable shall be made such that the cable is not damaged. The radius of the curve of the inner edge of any bend shall not be less than 5 times the diameter of the type AC cable. - ANSWER- What is the minimum size overhead service drop conductors in copper? - ANSWER- #8awg 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
CORRECT AND VERIFIED SOLUTIONS.
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. - ANSWER- Dry type transformer installed indoors rated over 35KV shall be installed in a vault. - ANSWER- 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. - ANSWER- 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 - ANSWER- 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. - ANSWER- 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. - ANSWER- Knife switches rated for more than 1200A at 250V or less, and at over 600A at 251 to 600V, shall be used only as: Shall not be opened under load , Isolating Switch. - ANSWER- Class 2 and class 3 cables listed as suitable for general purpose use with the exception of riser, ducts, plenums, and other spaces used for environmental air, shall be Type CL2 and CL3. - ANSWER- Branch circuit conductors with in 3"inches of a ballast shall have an insulation temperature rating not lower than 90C degree or 194F degree - ANSWER- Communication circuits shall have a minimum grounding conductor of 12AWG. - ANSWER- When mounting light fixture supported by EMT over a hot tub protected by GFCI must have a height of. Not allowed in NYC. - ANSWER- How many #10 conductors can be legally installed in a 4"inch square box, 2"1/8 deep? - ANSWER- 12 When installing receptacles around the pool they should be set back from the inside wall of not less than 6'ft. - ANSWER-
CORRECT AND VERIFIED SOLUTIONS.
What kind of circuit must the sump pump and lights in the elevator pit be connected to :separate branch CKT/ GFCI line side - ANSWER- When using a grounding conductor it should not be smaller than #14 copper insulated solid or stranded. - ANSWER- Where practicable a separation of at least 6ft shall be maintained between communication wires and cables on building and lighting conductors. - ANSWER- When using #12THHN or THWN which are both rated for the 90 degree and when you look at the table 300.15 what is the maximum overcurrent protection that can be used for general wiring? 20A fuse or circuit breaker - ANSWER- When shall it be permitted to use track lighting with receptacles at each end in a public bathroom? Not allowed in bathrooms - ANSWER- Where a boathouse is using a ramp that is movable because of the water level changing with the tides. What wiring type of raceway would you use at hinges? Liquidtight flexible metal conduit (no more that 6'ft) - ANSWER- What is not required to be marked on signaling wire cable? Voltage - ANSWER- For roads, streets and other areas subject to truck traffic, the minimum clearance of a 22KV overhead line shall be: 18.5'ft. - ANSWER- Mandatory rules of this code are those that identify actions that are specifically required or prohibited, use the term as: Shall or Shall not - ANSWER- What is not listed on a motor disconnect switch? - ANSWER-Laboratory approval Power conductor on poles must have a separation of not less than 30"inches Above from the communication conductors, when the power is greater than 300V - ANSWER- Fuses and circuit breakers shall be permitted to be connected in Parrallel where they are factory assembled in parallel and listed as a unit. - ANSWER- What is the maximum length of flexible metal conduit allowed in duct or plenum used for environmental air that is physically connected to equipment and permitted to be used in ducts or plenum chambers? 4'ft - ANSWER- When are lights permitted to be installed in ducts or plenums used for environmental air: Enclosed gasket type - ANSWER-
CORRECT AND VERIFIED SOLUTIONS.
How many 20A branch circuits are required for 80 linear feet of show window lighting space? 9 circuits - ANSWER- An electrician assigns men to install outlets in a room. It took 2.6 hours to install outlets in each room. At the end of 5 days, how many rooms are completed? Assume the men work 8hrs a day? 15 - ANSWER- Mandatory rules of the code are those that identify actions that a specifically required or prohibited and are characterized by the use of terms: Shall or Shall not - ANSWER- Which is not considered a power supply? - ANSWER-Capacitor A 15A or 20A 125V receptacle outlet shall be located within 25 feet of heating, air conditioning, and refrigeration equipment for : dwelling, commercial, industrial, occupancies. - ANSWER- For other than dwelling occupancies, banks, or office buildings, each receptacle outlet shall be calculated at not less than 180VA. - ANSWER- The minimum feeder load for show window lighting is 200V per linear foot. - ANSWER- On a 4 wire, delta connected, the phase system, where the midpoint of one phase winding is grounded, the conductor with the higher phase voltage to ground must be durably and permanently marked be an outer finish orange in color, or other effective means. - ANSWER- The load of electric clothes dryer is a dwelling unit shall be 5000 watts or the nameplate rating, whichever is larger, per dryer. - ANSWER- A branch circuit that supplies only one utilization equipment is a individual branch circuit. - ANSWER- The voltage of a circuit is define be the code as the nominal RMS(root means square) or effective difference of potential between any conductors of the circuit. - ANSWER- In New York City for services not rated over 600 volts , you can use Type ____ cable as long as the cable is enclosed in a threaded metallic conduit. - ANSWER-SE (Service Entry cable) In strait pull, the length of the box shall not be less than ____ times the trade size of the largest raceway. - ANSWER- 8 A separation of at least ____ is required between network communication cable and power cables. - ANSWER-4" (830)
