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Terms in this set (80)
what is the box fill allowance for each conductor originating outside and terminating inside a device box?
each device yoke counts as __ conductors based on the largest conductor terminating on the device
what are circuit breakers that may be installed in a modern service panel?
15 amp single pole, 60 amp double pole, GFCI
what must be grounded or bonded in a home electrical system?
metal water pipe, steel gas pipe, corrugated stainless steel tubing
the service size of a main service panel can be found by reading the ___ rating printed on the main circuit breaker
subpanels are subjected to the same installation and clearance requirements as main service panels
what is the box fill volume allowance for conductors that do not leave the box?
all home electrical systems must be bonded and grounded according to local code standards
what is the minimum service panel allowable by the NEC?
when a second panel board is installed that is supplied by a feeder, it is oftentimes referred to as a ___
when updating a main panel board for a residence from 100 A to 150 A service the neutral conductors do not need to be changed
what affects conductor voltage drop in a branch circuit
conductor length, temperature, current, and conductor gauge
a residential service entrance load calculation is required to correctly size which of the following?
service entrance conductors and the service panel
it is allowable to use a split receptacle wired to a switch in bedrooms instead of a ceiling light fixture
a ceiling light device box in the garage has to be rated for a paddle fan to be installed
a bare incandescent bulb is allowed in a clothes closet without a surrounding enclosure
345,000 volts is equal to ?
what is the total voltage drop allowed for the feeder and a branch circuit
is it a requirement to have a light fixture outside the garage door for a vehicle?
a powered sperving bearing has a resistance of 1 ohms. it is 0.1W device, what voltage is it running on?
a marzel vane is running on 100 volts and 10 amps. what is the resistance of this rare contraption?
which material has a lower resistance per foot given the same cross- sectional diameter?
are 3-way switches required to be used when wiring a 4-way switching circuit? if so how many?
Two three way switches are required
what is the maximum voltage drop allowed for a feeder circuit?
you have just installed a 4-way switch diagram in a kitchen where overhead lighting is switched from 4 locations. how many switching combinations will you have total?
what is the maximum voltage drop allowed in a branch circuit?
a sliding glass door requires a switch for overhead lighting
if you wanted to wire a 4-way switch circuit that was controlled from five locations, how many 4-way switches would you need to include in the circuit?
it is permitted in the 2017 NEC to put light fixtures on GFCI protected kitchen countertop small appliance circuits as long as they don't exceed to 80% rule for current draw
a light bulb is 100 watts and is connected to 10 volts. what current will the bulb draw?
if you have a circuit with 14 AWG and the voltage drop for the branch is just a little more than 3%, what can you do to decrease the voltage drop?
change the conductor gauge to 12 AWG
how many steps on a stairway will require at least one 3-way switch lighting circuit?
hallways greater than ___ are required to have at least one receptacle
are a pair of 3-way switches required at the top and bottom of a 4-step walkway from the mid-level to the lower level of a living room
on a pair of 3-way switches, the hot feed is wired to the common on the first switch and the __ is wired to the common on the second switch
if you have a small appliance kitchen counter top circuit in a kitchen that will have 4 receptacles on it, which statement would be correct?
only the first receptacle needs to be GFCI
new dishwasher circuits can be wired directly to NM cable. the circuit breaker is the disconnect.
you removed a cooktop from an existing house and it was wired with a three wire cord and plug. what do you have to do when you put the new one in?
you can install the new one with three wired cord and plug
3-way switches are clearly marked with on/off printing on the face plate of the switch
a cooktop exhaust fan may be wired as a load on the GFCI protected small appliance kitchen counter top branch circuit since it uses very little power
an island in a kitchen does have a sink on it. how many receptacles are required?
a peninsula doesn't have a sink on it, how many receptacles are required?
spacing between receptacles in a kitchen area that is not counter top space is?
no more than 6' from any receptacle along the wall
a counter in a kitchen is 11-1/2" wide, how many duplex receptacles are required?
describe a situation where a GFCI would not trip and you could become injured
If the GFCI outlet only has hot and neutral a tester will not cause it to trip, this doesn't mean they are miss wired but if no ground wire, the tester is not able to create the 6ma hot to ground that mimics a fault
what does the TR designation on the face of a receptacle stand for?
for purposes of replacement, receptacles rated for 110V, 115V, 120V or 125V are considered identical for residential applications
the outlet plug provided to a refrigerator must be GFCI protected
GFCI receptacles installed in outdoor locations must be rated for outdoor use and weather resistance along with ground fault protection
what is the term used when a GFCI opens the circuit because of small, normal fluctuations in branch circuit current flow
GFCI's protect against ground faults and AFCI's protect against ___
low level current leakage, electrical fires, arc faults
you are permitted by local code to replace split- wired receptacle with one of a different voltage or higher amperage rating
when wiring occupancy sensors, dimmer switches, timers and other switch types the white wire should never supply current to the switched load according to the current NEC guidelines.
a 15 amp receptacle can be used to replace a 20 amp receptacle with no change in wire gauge on the branch circuit
what areas would require a GFCI
wet bar, kitchen, bathroom
what techniques that can utilized by homeowners to childproof standard receptacles against electric shock
plastic caps, receptacle cover, tamper resistant receptacles, recessed wall receptacles
a GFCI wired for single location protection has uninterrupted hot and neutral wires from the voltage source connected only to the screw terminals marked ___
what measurement devices should be used to check for voltage in a circuit?
multimeter, plug in tester, touchless circuit tester
what is the minimum number of small appliance branch circuits required by the NEC to feed the kitchen counter top receptacles?
a two slot receptacle without a ground wire cannot be ground fault protected when wired to the load side of a GFCI
a circuit has a potential of 100 volts. the framistat that is covered to the circuit has a resistance of 10 ohms. how much current does the framistat draw?
when terminating a receptacle, the black wire can be terminated on either the brass or silver screw
it is acceptable to have insulation from a conductor under the head of the screw on a device terminal
loose device terminations can cause high temperatures and possibly cause an electrical fire
after installing a wire nut on three black wires, it is ok if 1/2" of copper is visible coming out the bottom of the wire nut
what is the calculations of ohms law
what is a fish tape used for
to fish wiring within finished walls of ceilings
you must bond plastic device boxes to ground
a current meter measures 4 amps on a circuit, the device that is connected to the circuit has a resistance of 3 ohms. what voltage applied to the circuit?
how much cable sheath should extend past the cable clamp of a typical device box?
it is not necessary to remove the outer jacket sheath from NM cable inside the circuit breaker panel
what is the underwriters laboratory (UL) voltage rating stamped on the NM cable used in our labs?
What does PPE stand for?
personal protective equipment
the wiring methods and size of conductors used in an electrical electrical system depend on the size and distribution of the electrical load
anyone in the classroom can energize the electrical trainers
what is the purpose of the lockout device
to protect workers from injury, to prevent power from being turned on inadvertently, prevent the unprotected release of hazardous gases or fluids
shock severity is more dependent on the amount of current than the voltage
tagout is a term describing the identification procedure used to let other workers know who applied the lockout
ladders used by electricians should be made of
what are factors that determine the extent of an injury due to electrical shock
duration of exposure, path of current, amount of current
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