set 5b
Plug fuses and fuse-holders shall NOT be used between conductors and the grounded neutral in circuits exceeding how many volts ?
150
What is the total loading of a double duplex receptacle
2 x 180
All switches shall not be more than ____________mm above floor.
2000
An all-electric home has a laundry area located in a kitchen closet. What is the MINIMUM number of branch circuits serving this kitchen?
3
In a 1,200-square-foot apartment, the lighting and small appliance circuits are on 20-amp, 120-volt circuits. Laundry facilities are available to the tenants in the complex. How many 20- amp circuits are required in the apartment?
3
A 8.0 sq. mm UF copper has an ampacity of 40 A at 30 degree Celsius, if aluminum is conductor is used assuming same conductor size and ambient temperature what will be the ampacity.
30 A
An overcurrent protective device of adequate short-circuit rating that will open simultaneously all ungrounded conductors when it operates shall be applied in the grounding autotransformer branch circuit and shall be rated or set at a current not exceeding 125 percent of the autotransformer continuous per-phase current rating or ___percent of the continuous-current rating of any series connected devices in the autotransformer neutral connection
42
Ceiling fans may be supported solely by outlet boxes that are identified for such use, as long as the fans do not exceed ________ lbs. in total weight.
50
The minimum clearance between two bare current carrying conductor of different potential is
50 mm
The size of conductor in cable bus should not be
50 sq mm
A house has an area of 200 sq m. What is the computed demand load for all loads to which lighting feeder demand factors apply?
5000 watts
For a wye-start, delta-run connected motor, the selection of branch-circuit conductors on the line side of the controller shall be based on the motor full-load current. The selection of conductors between the controller and the motor shall be based on _____ percent of the motor full-load current.
58
A general purpose single phase motor rated at 220 V, 5 A. What should be the setting of the overload relay that is installed to protect the motor.
6.25 A
Branch circuits for heating and air-conditioning equipment located on the elevator car shall not have a circuit voltage in excess of _____ volts.
600
Fuses rated _______ V nominal or less shall be permitted to be used for a voltage at or below their ratings.
600
The minimum insulation level for neutral conductors in solidly grounded systems is ________ volts.
600
Adjustment factor shall only be applied to bundled conductor on conduit/raceway larger than.
600 mm
What is the MAXIMUM allowable AWG size for a solid conductor installed in a raceway?
8 AWG
What is the MINIMUM size underground service lateral for a copper-clad aluminum single- branch circuit serving a controlled water heater?
8.0 sq mm
A single piece of equipment consisting of a multiple receptacle comprised of four or more receptacles shall be computed at not less than _____ volt-amperes per receptacle
90
The current carrying conductor in the cable bus shall have an insulation rating of.
.75 °C
Where one or more of the motors of the group are used for short-time, intermittent, periodic, or varying duty, the ampere rating of such motors to be used in the summation shall be for the highest rated motor, the greater of either the ampere rating or the largest continuous duty motor full-load current multiplied by _____shall be used in the summation.
1.25
A single receptacle on an individual branch circuit shall have a MINIMUM rating of what percentage of the branch circuit's rating?
100
Sign and outline lighting outlets shall be computed at a minimum of ______ volt-amperes for each required branch circuit
1200
A ______ with a trip setting of not more than times ___________ times the ampacity of conductor shall be considered as to provide the required short circuit protection.
Circuit Breaker, 6
At all building and structure, the PEC requires one of the FF.
Service disconnecting means
Circuit breakers shall have the following ratings:
The continuous current rating of a circuit breaker shall not be less than the maximum continuous current through the circuit breaker. . The rated maximum voltage of a circuit breaker shall not be less than the maximum circuit voltage.
A 600 V cartridge fuse is most readily distinguishing from 250 V cartridge fuse of the same ampere rating by comparing its
diameter
A ______ rated in computed ampere not to exceed ___________ times the ampacity of conductor shall be considered as to provide the required short circuit protection
fuse, 3
When running low voltage cables in a ceiling that is being used for air handling, what type of cable should be installed?
plenum-rated cable
Voltage transformers installed indoors or enclosed shall be protected with
primary fuses.
The code ______the use of a raceway as a means of support for nonelectric equipment, such as suspended ceilings, water pipes, nonelectric signs, and the like, which could cause a mechanical failure of the raceway.
prohibits
Grounding autotransformers can either be_________ connected to 3-phase, 3-wire ungrounded systems for the purpose of creating a 3-phase, 4-wire distribution system or providing a neutral reference for grounding purposes. Such transformers shall have a continuous per-phase current rating and a continuous neutral current rating except for
vertex grounded delta
About every 5 years new edition of PEC are issued, incorporating changes approved in the interim period. These changes are considered in the PEC by the use of
vertical Marginal line
The unit of thermal resistivity is.
°C - cm/W