PEC NQS 2019

TRUE

(True or False) Limited power cables shall be listed as suitable for carrying power and data service up to a specified current limit for each conductor without exceeding the temperature rating of the cable where the cable is installed in cable bundles in free air, or installed within a raceway, cable tray, or cable-routing assembly.

TRUE

(True or False) Where an orderly shutdown is required to minimize the hazards of personnel and equipment, a system of coordination based on the following conditions shall be permitted: A. coordinated short-circuit protection B. overload indication based on monitoring systems or devices

30 AMPERES, 1800 mm

125-V and, or 250-V single-phase receptacles not exceeding _____ A and located within _____ mm measured horizontally of the inside walls of a hydromassage bathtub shall be protected by a ground-fault circuit-interrupter.

1900 m², 0.1 m²

A transformer vault ventilated by natural circulation of air to an outdoor area, the combined net area of all ventilating openings, after deducting the area occupied by screens, gratings, or louvers, shall not be less than _____ mm² per kVA of transformer capacity in service, and in no case shall the net area be less than _____ m² for any capacity under 50 kVA.

5000 kW

Article 6.91 covers the installation of Large-Scale Photovoltaic Electric Power Production Facilities with a generating capacity of not less than _____ kW and not under exclusive utility control.

1800 mm, 3000mm

At least one 125-volt or 250-volt, 15 or 20 A receptacle on a general purpose branch circuit shall be located not less than _____ mm from and not exceeding _____ mm from the inside walls of the spa or hot tub.

A.

Conductors shall be permitted to be tapped to a feeder without overcurrent protection at the point of tap to a distance 3000 mm and 7500 mm with different sets of conditions, one condition is the ampacity of the tap conductors for the taps not exceeding 3000 mm the ampacity of the tap conductors shall be sized not less than the load served by the tap conductors and not less than the overcurrent protective device with such protection, for tap conductors not exceeding 7500 mm the ampacity of the tap conductors shall be not less than _____ the rating of the overcurrent protective device. A. 1/3 B. 1/2 C. 3/4 D. 100%

C.

Definition of isolation transformer. A transformer of the multiple-winding type, with the primary and secondary windings physically separated, that _____ couples its ungrounded secondary windings to the grounded feeder system that energizes its primary windings. A. effectively B. virtually C. inductively D. collectively

B.

For a 100kVA, single-phase two-wire transformer, with primary side voltage at 460V and secondary voltage rated at 230 volts, the primary inverse-time circuit breaker provided is 600 A. What is the rating of the transformer secondary inverse time circuit breaker protection? A. 500 A B. 600 A C. 1000 A D. 1200 A

C.

For a wye-start delta-connected motor, the ampacity of the conductors between the controller and the motor shall not be less ___ ampacity of the motor full-load rating. A. 100% B. 62.5% C. 72% D. 125% E. 80%

1500 V

Maximum voltage of PV system dc circuits shall be the highest voltage between any two circuit conductors or any conductor and ground are as follows: (a) For one- and two-family dwellings, 600 V or less (b) For other types of buildings, 1000 V or less (c) For buildings where the DC PV system equipment is not located on or in the building, _____ V or less

125%

The branch-circuit conductors supplying one or more units of information technology equipment shall have an ampacity not less than _____ percent of the total connected load.

190%

The conductor between the field-wiring output terminals of the single-phase half-wave type rectifier and the motor shall have not less than the _____ ampacity of the motor full load current rating?

C.

The connection between the grounded circuit conductor and the equipment at the service is called ______. A. bonding connection or jumper B. equipment bonding jumper C. main bonding jumper D. system bonding jumper E. neutral connection F. grounding electrode conductor G. none

600 V

The maximum voltage of PV system dc circuits shall be the highest voltage between any two circuit conductors or any conductor and ground. PV system dc circuits on or in one- and two-family dwellings shall be permitted to have a maximum voltage of _____ volts or less.

1200 A

To indicate a ground fault in solidly grounded wye, a legally required standby systems of more than 150 V to ground, and circuit protective rated 1000 A or more, the sensor for the ground-fault signal devices shall be located at or ahead of the main disconnecting means for the legally required standby source. What is the maximum setting of the signal devices for ground-fault current? Express your answer in amperes.

B. and C.

What are the two colors permitted by the PEC2017, for the installation of two conductors used in DC systems? A. white B. black C. red D. brown

B.

What is the lowest demand factor for computing the elevator feeder size, assuming a 50% duty cycle? A. 75% B. 72% C. 68% D. 50%

A.

Which of the following duty, operation is carried out at intervals of load and no load; or load and rest. A. intermittent duty B. periodic duty C. short-time duty D. varying duty

YES

Yes or No? Is concealed knob-and-tube wiring method still permitted by PEC1 2017?

NACELLE

_____ is an enclosure housing the alternator and the other parts of the wind turbine.