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1) Where a building supplied with electrical service also has a water supply from a metal underground water pipe in direct contact with earth for 10 feet or more. Which of the following applies?A- The grounding electrode system shall have a resistance to earth of 25 ohms or lessB- When a rod, pipe, or plate electrode is the only type electrode available to supplement a metal underground water pipe and has a resistance to earth of more than 25 ohms, it must be supplemented by rod, pipe or plate electrodeC- A rod, pipe or plate electrode is not required to have a resistance to earth of 25 ohms or less when it is used to supplement an underground metal water pipe electrodeD- A “Made” electrode such as a rod, pipe or plate, shall be installed to supplement a metal underground water pipe electrode regardless of whether other electrodes are present and used as part of the grounding electrode system2) What is the minimum cover requirement for direct-burial cable for a 120v, 20 amp GFCI protected branch circuit for an illuminated sign complying with article 600 when installed beneath the parking lot for a restaurant?A- 6 inchesB- 12 InchesC- 18 inchesD- 24 inches3) A condenser unit for a HVAC system has a nameplate providing the following information: 208/230v, single phase: Compressor-13 58.3 LRA. Fan- 0.7 FLA. Min circuit amp 17.9 Max fuse rating 30: max HACR circuit breaker rating 25. All equipment terminals are rated 75’c. What is the minimum size type MC cable required for the branch circuit conductors supplying the condenser unit?A- 14 AWGB- 12 AWGC- 10 AWGD- 8 AWG4) A ladder cable tray is 24 inches wide and has a depth of 8 inches. The maximum Cross-Sectional area of any of the cables is less than that of 4/0 AWG. What is the maximum combined cross-sectional area of multiconductor control and/or signal cables allowed to be installed?A- 7 square inchesB- 28 Square inchesC- 72 square inchesD- 192 Square inches5) A Three-phase transformer with a 480v three-wire delta-connected primary and a 120v/208v, four wire, WYE-connected secondary feeds a three phase, four-wire 120/208v lighting and appliance branch circuit panelboard. Which of the following provides overcurrent protection for the panelboard?A- A set of fuses on the primary side of the transformer having a current rating not exceeding the value determined by multiplying the panelboard rating by the secondary-to-primary voltage.B- Overcurrent protection on the secondary side of the transformer having a rating not greater than the panelboard. C- inherent thermal protection in the transformerD- A panelboard with a rating greater than the minimum feeder capacity required for the calculated load is not required to be provided with overcurrent protection. 6) A 350 KVA, 480-120/208Y three phase transformer is installed as a separately derived system. 500 amp fuses provide primary overcurrent protection for the transformer. Two 500Kcmil, copper conductors per derived phase are installed in separate flexible metal conduits between the secondary of the transformer and a switch board with a main circuit breaker rated 500 amps. The system bonding system jumper connection is made in the switch board. What is the maximum required size copper system bonding?A- 2AWGB-1 AWGC- 1/0 AWGD- 2/0AWG7) What is the minimum size copper type THWN conductor and the maximum size overcurrent protective device for a feeder to supply eight non-motor generator arc-welders, each rated 240v, single phase, 32 ampere primary, and operated at 50% duty cycle?A- 1AWG and 200 ampere overcurrent deviceB- 1/0AWG 300 ampere overcurrent deviceC-2/0 and 350 amp overcurrent deviceD- 250 MCM and 400 ampere overcurrent device8) A 208v, 35 amp, three phase, continuous rated load is supplied by a branch circuit that is 90 feet long. The circuit conductors are stranded 8 AWG type THHN copper conductors. What is the voltage drop of the circuit? Use either a K rating of 12.8 or ohms per 1000 feet based on the size of the conductor.A- 2.5VB- 4.2VC- 4.9VD- 6.4V9) What is the maximum current rating of a cord-and-attachment-plug-connected room air conditioner connected to a 15 ampere branch circuit that also supplies lighting and receptacle outlet?A- 7.5ampsB- 10ampsC-12.5ampsD- 15amps10) which one of the following is the minimum bending radius for a 10 AWG 3 conductor type NM cable that has a diameter of ? inch?A- 2 inchesB- 2.5 inchesC- 3.5 inchesD- 5 inches11) A residential dwelling has no intersystem bonding termination. Which one of the following is NOT permitted as an antenna system grounding connection?A- the building’s power service equipment enclosureB- a flexible metallic power service racewayC- any of the building’s power service grounding electrodesD- any of the building power service grounding electrode conductors12) Except when rigid metal conduit and intermediate conduit are used. Which of the following is the minimum clearance from the lowest surface of a metal corrugated roof deck to the top of the cable, raceway or box?A- none, where the cable, raceway or box is installed between the ribs above the decking and is secured directly to the metal building framing members.B- none, as long as there is more than 2” of insulation used between the metal corrugated roof deck and the rubber roof membrane.C- 1.25 inchesD- 1.5 inches13) Which one of the following is a requirement for lighting outlets in guest rooms and guest suites of hotel, motels and similar occupancies?A- there shall be at least one wall switch-controlled lighting outlet in every habitable room and bathroom.B- there shall be at least one wall switch-controlled receptacle outlet which shall be used for portable luminaires.C- there shall be a dedicated 20 amp circuit installed to each bathroomD- There shall be at least one dedicated 20 amp branch circuit installed in a suitable location for the refrigerator and microwave oven.14)what is the minimum size steel reinforcement rod permitted to be used as a concrete- encased electrode?A- ? inchB- 3/8 inchC- ? inchD- 5/8 inch15) Which of the following may be acceptable to the authority having jurisdiction as suitable for use as an emergency source of power for emergency exit lighting?A- A separately derived system supplied by the normal power source B- a connection on the line side lugs in the main service disconnecting means enclosure provided with proper overcurrent protectionC- a connection on the line side lugs in the panel board feeding the same area of the building as the exit lighting is locatedD- an additional service16) A 20-inch long, schedule 40, rigid polyvinyl chloride conduit nipple between a meter cabinet and a service disconnecting means contains six 500 kcmil type THHN circuit conductors and two 3/0 AWG type THHN system bonding conductors. What is the minimum trade size of the conduit?A- 3.5 inchesB- 3 inchesC- 2.5 inchesD- 4 inches17) which of the following determines the rating of a branch circuit?A- the ampacity of the conductors at no more than 75*cB- the maximum current rating of the equipment or apparatus suppliedC- the rating of the overcurrent protection deviceD- not less than 83% of the determined load. 18) what is the minimum size copper thype THWN motor circuit conductor required to supply a single 50 horsepower, three phase, continuous duty induction type (squirrel-cage or wound rotor) motor with a nameplate rating of 230/460v, 120/60amos that is connected to a 480v branch circuit?A- 6AWG B- 4AWGC-3AWGD-1AWG19) Except for installations in nipples, what is the maximum percentage conduit fill slowed where more than 2 cables are installed in a raceway?A- 31%B- 40%C-53%D-60%20) A trade size 1.5 type PVC conduit is installed exposed in an outdoor parking ramp. The conduit extends in a straight line 95 feet from one junction box to another junction box. The conduit is installed when the outside temperature is 45*F. The anticipated minimum temperature is -30*F and the maximum anticipated temperature is 105*F. Based on the temperature at installation , which one of the following pertains to the anticipated expansion or contraction of the conduit?A- the conduit will expand more than contractB- the conduit will contract more than expandC- at a length of only 95 feet, the expansion and contraction is negligibleD- none of the above21) Which one of the following Is NOT required to be connected to the equipotential bonding grid installed in a pool area to reduce voltage gradients?A- the conductive pool shell and perimeter surfaceB- all fixed metal parts, metallic components and metal fittingsC-the underwater lighting and electrical equipmentD-any portable equipment where the equipment grounding conductor of the branch circuit is used to bond the equipment22) What is the voltage to ground of an ungrounded circuit for a three-phase, three-wire, delta connected system where the phase-to-phase voltage is 480 volts?A- 0 voltsB- 240vC- 277vD-480v23) Under which one of the following conditions is conductor overload protection NOT required?A- where overload protection does not correspond with standard ampereB- where interruption of the circuit would create a greater hazardC- where disconnecting means is located within sight of the driven machineryD- where connected in series with each underground conductor24) what is the maximum number of 10 AWG type THHN conductors that can be spliced in a conduit body that is marked with a volume capacity of 18 cubic inches?A- 2 conductorsB- 6 conductorsC-7 conductorsD- 8 conductors25) Excluding exceptions, which one of the following does NOT apply to the requirement for disconnecting means for fluorescent luminaires?A- the branch circuit overcurrent device located within sight of the luminaire or capable of being locked in the open position shall be permitted as the required disconnecting meansB- a disconnecting means shall be provided for ballast in every new luminaire installationC- Upon replacement, a disconnecting means shall be installed for ballast in existing luminairesD- the disconnecting means may be a separable connector located within the luminaire, or a switch integral with the luminaire, or external within sight of the luminaire26) in which manner shall grounded conductors that are not part of a parallel circuit be terminated within a panelboard or loadcenter?A- in an individual terminal that is also not used for another conductorB- in a terminal identified for more than one conductor with other grounded conductorsC- in any listed lug or terminalD- with an irreversible compression connector or exothermic weld27) in a patient care area of a dental clinic all non-current-carrying conductive surfaces af fixed electrical equipment operating at over 100 volts that are subject to personal contact and likely to become energized shall comply with which one of the following?A- Type NM cable shall be permitted where concealed in walls, floors, or ceilings that provide a minimum of a 1-hour fire-resistive ratingB- be directly connected to an insulated copper conductor that is installed with the circuit conductors in the wiring methods in 517.13(A)C- luminaires located more than 7.5 feet above the floor and switches outside the patient vicinity shall not be required to be groundedD- Receptacle outlets are required to listed “Hospital Grade”28) Communication systems in nursing homes and limited care facilities intended for issuing instructions during emergency conditions shall be supplied by:A- the critical branchB-the equipment branchC- the normal power sourceD- the life safety branch29) Which one of the following would not apply when a 300-ampere, 277/408v three-phase, four-wire feeder is installed in rigid polyvinyl chloride conduit from the service equipment in a manufacturing plant to a distribution panelboard in the separate office building?A- an equipment grounding conductor shall be extended with the feeder conductorsB- an equipment grounding conductor extended with the feeder is required to be bonded to the office building disconnect enclosure. C- the equipment grounding conductor extended with the feeder circuit shall be connected to the grounding electrode conductor(s) at the office building disconnect enclosure.D- the neutral conductor of the feeder circuit and the equipment grounding conductor extended with the feeder conductors shall be connected to the grounding electrode(s) at the office building disconnect enclosure30) What is the ampere rating of an electric boiler rated 158KW, 480v threephase?A- 190 amperesB- 158 AmperesC- 110 amperesD- 238 amperes32) What is the maximum rating of the motor branch circuit overcurrent protective device for a 208v, three-phase motor with a nameplate ampere rating of 23.5 amperes when a class 1 motor circuit using 14 AWG type THHN conductors is tapped form the load side of the motor branch circuit overcurrent protective device and extended to a control station that is remote from the motor controller?A- 45 AmpsB- 30 ampsC- 25 ampsD- 60 amps33) which of the following is NOT a requirement for a listed luminaire to be cord-and-plug-connected?A- the cord is visible for its entire length and not subject to strain or physical damageB- the plug and outlet are locking typeC- the luminaire is located directly below the outlet boxD- the cord is terminated in a grounding-type attachment plug34) for which of the following circuits or systems is a circuit breaker marked 3-pole, 100-ampere, 408Y/277-volt NOT permitted?A- a 408/277-volt, 4 wire feeder supplying a lighting and appliance branch circuit panelboardB- a 408-volt corner-grounded delta connected systemC- a 240-volt corner-grounded delta-connected systemD- a 480-volt 3-wire branch circuit supplied by a 480/277-volt wye-connected system35) form the list below select the statement that correctly applies to the Installation of recreational vehicle site supply equipmentThe rating of individual recreational vehicle equipment shall not be less than 50 amperes at 120/240- voltsRecreational vehicle site supply equipment shall be located not less than 2ft or more that 6ft 6in above the ground All recreational vehicle site receptacle outlets are required to be provided with GFCI protectionThe maximum rating of branch circuits to supply recreational vehicles is 50-ampere, 250-volt36) what is the minimum size copper grounding conductor between a building’s grounding electrode system and the antenna discharge unit or grounding block installed for a dish-type antenna system?A- 17 AWGB- 8 AWGC- 12 AWGD- 10 AWG ................
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