ELCTK 111
Where noncombustible surface material is used on walls or ceilings, outlet boxes must be mounted so that they will be set back not more than ___ from the face of the surface material.
1/4 in. (6 mm)
For a one-family residence, the minimum size main service disconnecting means is ____ three-wire.
100-ampere
A 20-ampere branch circuit requires ___ AWG conductors, ignoring the effects of voltage drop.
12 copper
A 20-ampere branch circuit requires ____ AWG conductors, ignoring the effects of voltage drop.
12 copper
In newly constructed homes, smoke detectors are required to have ____ for the primary source of power.
120-volt ac
Because a water heater represents a continuous load, the branch circuit must be rated not less than ____ percent of the water heater nameplate rating.
125
Chime transformers used in dwellings are generally rated ____ volts.
16
The Volume required for each #12 AWG conductor is:
2.25 cubic inches
Table 220.12 of the NEC tells us that the minimum load requirement for dwelling units is ___ volt-amperes (VA) per square feet of occupied area.
3
The NEC recommended a voltage drop no greater than ___ percent for feeders and no greater than ___ percent total for feeders and branch circuits together.
3, 5
Prior to the 1996 NEC, ___ receptacles and cords were permitted. However, now it is mandatory that a separate equipment grounding conductor be installed to ground the frames of electric clothes dryers and electric ranges.
3-wire
An arc flash can produce temperatures of ____ F.
35,000
Wall receptacles in a habitable room must be placed so they are no further than ___ feet from any point along the wall.
6
Ground rods must be at least ____ ft. in length.
8
A continuous load shall not exceed ___ of the rating of the branch circuit.
80%
GFCI protection is required for which of the following?
A receptacle installed within 6 feet of a wet-bar sink
The National Electrical Code requires receptacles installed in a garage to be ____.
GFCI protected
According to your ugly's book, E x I =
Watts (P)
Low voltage (high voltage drop) in a home can be caused by _____.
a conductor that is too small for the load, a circuit that is too long, poor connections at the terminals
A receptacle outlet is ____.
an outlet where one or more receptacles are installed
Under certain circumstances, the grounded (neutral) conductors of a residential service ____ permitted to be sized smaller than the phase conductors.
are
The "12 foot rule" for spacing receptacles applies to all the following areas of a house, except for _____.
attics
A main service discoonnect shall not be installed in a ___.
bathroom
Overheating of lighting fixtures, which often results in fires, is most often caused by ____.
burying recessed fixtures under thermal insulation and overlaming
For most residential electric ____, receptacles and cord sets are rated 30 amperes, 125/250 volts.
clothes dryers
For a given conductor size, which material has the greatest ampacity?
copper
Table 310.15(B)(2)(a) gives allowable ampacities of copper conductors with various types of insulation. When conductors will be used in ambient temperatures exceeding 30 C (86 F), the ____ for the table must be applied.
correction factor
Receptacles rated 30 amperes are referred to as _____ receptacles, and receptacles rated 50 amperes are called ___ receptacles.
dryer, range
Leaving fluorescent lamps on for long periods of time ____ lamp life.
extends
Describe at least three effect of voltage drop in residence:
flickering TV, machines working at half speed, over heating
The long slot on a 15-ampere, 125-volt, receptacle is the ___ conductor.
grounded
Luminaire is a term that refers to ___.
incandescent lighting fixtures, florescent lighting fixtures, and outdoor pole-mounted fixture
Conductor sizes up through 4/0 AWG are expressed in American Wire Gauge (AWG). Conductor sizes larger than 4/0 AWG are expressed in ____.
kcmil
All of the following items of electrical equipment are devices, except for a ____.
lamp
The importance of installing smoke and fire alarms in homes is supported by results from exhaustive investigations of home fires indicating that ____.
measurable quantities of heat come before detectable quantities of smoke
When the word "shall" appears in a NEC reference, it means that it ____ be done.
must
Branch circuit conductors shall have an ampacity ____ the maximum to be served.
not less than
The rating of a branch circuit is determined by its ____.
overcurrent protective device (fuse or circuit-breaker)
A(n) ____ is a condition where the current flowing in a circuit is more than the current or equipment is designed to handle.
overload
As defined in Article 100, a dwelling unit has the following feature(s):
permanent provisions for living, sleeping, cooking, and sanitation.
THe National Electrical Code is a minimum ___ standard.
safety
The National Electrical Code is a minimun ____ standard.
safety
Overcurrent protection for residential services, branch circuits, and feeders is provided by circuit breakers or fuses. These are the "___" of an electrical circuit.
safety valves
A(n) ____ is a condition where two or more conductors come into contact with one another.
short circuit
The NEC requires that conductors 8 AWG and larger must be ___ when installed in a raceway.
stranded
Name several factors that must be taken into account when sizing boxes per the NEC:
the size of the box, number of wires, size of wires.
The purpose of electrical symbols on plans is ____.
to graphically represent electrical products and system
Devices are equipment whose primary function is to carry curreent, not ___.
utilize elecctric energy
