Which UL Standard is required to be used by qualified electrical testing laboratories to
evaluate snap switches for electrical safety?
a.UL 20
b.UL 467
c.UL 498
d.UL 891
The correct answer is: UL 20
A motor circuit switch is generally required to be rated in ? .
a.amperes
b.horsepower
c.locked rotor amperes
d.voltage and short-circuit current
The correct answer is: horsepower
General-use dimmer switches shall be used to control ? unless listed for the control of
other loads and installed accordingly.
a.ceiling-suspended paddle fans
b.fluorescent luminaires
c.permanently installed incandescent luminaires
d.standard duplex or single receptacles
The correct answer is: permanently installed incandescent luminaires
Where the white or gray conductor of a cable assembly is used as a switch loop for circuits of 50 volts or more, the switch loop must be permanently reidentified as an ungrounded conductor by ? .
a.an effective means of any color
b.marking tape, painting, or other effective means of a color other than white, gray, or
green
c.the use of gray or white paint
d.the use of gray or white tape
The correct answer is: marking tape, painting, or other effective means of a color other
than white, gray, or green
The white or gray conductor of a cable assembly, where used in switch loop wiring, is not permitted to be used as a ? .
a.return conductor from a switch to a switched outlet
b.supply side of single pole switch
c.supply side (point wire) of a 3-way switch
d.none of the above
The correct answer is: return conductor from a switch to a switched outlet
A general-use snap switch used to supply a one-horsepower motor shall be permitted to
control a load of not greater than ? .
a.50% of the rating of the switch
b.80% of the ampere rating of the switch
c.100% of the rating of the switch
d.125% of the switch
The correct answer is: 80% of the ampere rating of the switch
Where switches or other devices are ganged in a four-gang box, and the voltage between adjacent switches exceeds 300 volts, which of the following is required?
a.Each switch requires its own device box.
b.Electrical tape is required around the device terminals.
c.Permanently installed barriers are required between adjacent devices.
d.Switches without screw terminals are required to be used.
The correct answer is: Permanently installed barriers are required between adjacent
devices.
Switches are required to be marked in accordance with which of the following?
a.Hospital grade when used at patient bed locations in a critical-care area
b.Ivory in color
c.To indicate the load they serve
d.Voltage and current ratings
The correct answer is: Voltage and current ratings
Generally, multipole switches are permitted for use only on ? circuits unless listed and marked for other than single circuit use.
a.277 V
b.480 V
c.multiple circuits where clearly identified in the field
d.single
The correct answer is: single
? are generally required to be grounded.
a.Dimmer switches
b.Fan controls and other similar switch controls
c.Snap switches
d.All of the above
The correct answer is: All of the above
Switch faceplates made of nonmetallic (insulating), noncombustible material must generally not be less than ? in thickness.
a.0.76 mm (0.030")
b.1.02 mm (0.040")
c.2.54 mm (0.100")
The correct answer is: 2.54 mm (0.100")
Where a snap switch is marked “CO/ALR,” it is suitable for use with which of the following
types of conductors?
a.Aluminum conductors
b.Copper conductor
c.Copper-clad aluminum conductors
d.All of the above
The correct answer is: All of the above
Snap switches with “push-in” terminal connection means are permitted for use with ? conductors.
a.aluminum
b.solid copper
c.stranded aluminum
d.stranded copper
The correct answer is: solid copper
Switches marked with an off position are required to ? .
a.be capable of being locked in the open position
b.completely disconnect all ungrounded conductors to the load they control
c.partially disconnect the load they control
d.none of the above
The correct answer is: completely disconnect all ungrounded conductors to the load they
control
A general-use dimmer switch is required to be counted as ? where installed in a singlegang box on a circuit wired with 12 AWG copper conductors.
a.1 conductor (2.25 in.^3 total)
b.2 conductors (4.00 in.^3 total)
c.2 conductors (4.50 in.^3 total)
d.3 conductors (2.25 in.^3 total)
The correct answer is: 2 conductors (4.50 in.^3 total)
A 3-pole, general-use snap switch is generally permitted to be used to control ? .
a.multiple branch circuit where rated for the voltage applied
b.multiple circuits where marked “three-circuit”
c.3 circuits, all of different voltages
d.3 separate circuits where properly rated
The correct answer is: multiple circuits where marked “three-circuit”
What is the minimum size copper equipment grounding conductor required for a 20- ampere lighting circuit?
a.14 AWG
b.12 AWG
c.10 AWG
d.8 AWG
The correct answer is: 12 AWG
What is the minimum size equipment bonding jumper required to be connected from a grounding terminal on a switch for a neon tubing outline lighting circuit protected at 30 amperes?
a.14 AWG copper
b.12 AWG aluminum
c.12 AWG copper
d.10 AWG copper
The correct answer is: 10 AWG copper
? locations in a dwelling unit do not require a switch-controlled lighting outlet.
a.Attached garage
b.Bathroom
c.Clothes closet
d.Kitchen
The correct answer is: Clothes closet
Where an attic space contains equipment that requires servicing, such as an air conditioner, where is the switch for the required lighting outlet to be located?
a.At the air conditioner
b.At the usual point of entry to the attic
c.In the closet (where equipped with a pilot light)
d.In the garage
The correct answer is: At the usual point of entry to the attic
Where a neon transformer for a sign is installed in a soffit location, where is the switch controlled lighting outlet required to be located?
a.At or near the transformer(s)
b.At the stairway below the access panel
c.At the usual point of entry to the space
d.On the roof
The correct answer is: At or near the transformer(s)