wiring test 2
The NEC® requires a clearance of at least __________ feet above final grade for service conductors where they are connected to the building, above sidewalks and other areas accessible to pedestrians.
10 ft
On a 20-ampere rated branch circuit, what types of receptacles may not be used?
15-amp single
The NEC® requires a vertical clearance of at least __________ feet above public streets, alleys, roads, and parking areas subject to truck traffic.
18 ft
Plug fuses of the Edison-base type shall have a maximum rating of ______
30 amps
A circuit breaker having an interrupting current rating of other than ______ shall have its interrupting rating marked on the circuit breaker.
5,000 amps
The proper NEMA designation for a 15-ampere, 125-volt grounding-type receptacle is __________.
5-15R
Where more than one ground rod, pipe, or plate is used, the grounding electrodes must be at least __________ feet apart.
6 ft
Ground rods must be at least ________ feet long.
8 ft
GFCI
A __________ device operates by monitoring the current flow on both the ungrounded "hot" conductor and the grounded conductor.
high intensity discharge lighting (hid)
A lamp that produces light as a result of an electric arc is using ____.
florescent lighting
A lamp that produces light as a result of an electric current passing through a gas is using ____.
incandescent lighting
A lamp that produces light as a result of current passing through a resistive filament is using ____.
Type ______ is a factory assembly of insulated circuit conductors within an armor of interlocking metal tape, or a smooth or corrugated metallic sheath.
MC
Type _________ is flexible, inexpensive and easily installed but offers limited physical protection of the conductors.
NM
Type ______ cable is a fabricated assembly of insulated conductors, 14 through 1AWG, in a flexible interlocked metallic sheath.
NOT MC- AC?
Type ______ cable is an assembly primarily for services.
SE
The next higher standard rating overcurrent device above the ampacity of the ungrounded conductors being protected shall be permitted to be used, provided all of the following conditions are met:
The conductors are not part of a branch circuit supplying more than one receptacle for cord-and-plug-connected portable loads; The ampacity of the conductors doesn't correspond with the standard ampere rating of a fuse or circuit breaker; The next higher standard rating selected doesn't exceed 800A.
color temperature
The measure of the color appearance of a light source that helps describe the apparent "warmth" or "coolness" of the light source is called __________.
what are the parts of an HID lamp
arc tube, glass envelope, base (not a filament)
Type SE cable shall be permitted to be used as ______ in wiring systems where the insulated conductors are used for circuit wiring and the uninsulated conductor is used only for grounding.
branch circuits or feeder conductors
Lamp manufacturers are concerned with what factors?
color temp, color rendering, lamp efficiency
Lamp diameters are measured in __________ of an inch.
eights
Type NM cable shall not be used
embedded in poured cement, concrete, or aggregate
Which luminaires require a ballast?
florescent and HID
A GFCI device provides protection against __________.
ground faults
Which of the following lamp types is the most inefficient?
incandescent
What do the letters "LED" stand for?
light emitting diodes
Type NM and Type NMC cables shall be permitted in _____
multifamily dwellings permitted to be of Types Ill, IV, and V construction; other structures permitted to be of Types Ill, IV, and V construction, except as prohibited in 334.12 and other structures permitted to be of Types Ill, IV, and V construction, except as prohibited in 334.12
A T-8 fluorescent tube is __________ inch(es) in diameter.
one
The overhead service conductors from the last pole to the point connecting them to the service entrance conductors at the building are called __________ conductors.
service drop
The point of connection between the wiring of the electric utility and the house wiring is called the __________.
service point
Bends made in interlocked or corrugated sheath Type MC cable shall have a radius of at least ______ times the external diameter of the metallic sheath.
seven
There shall be no more than ______ disconnects installed for each service or for each set of service-entrance conductors as permitted in 230.2 and 230.40.
six
Type MC cable shall be secured at intervals not exceeding
six feet
Type NM cable can be supported and secured by ______
staples, cable ties, and straps
Type AC cable can be supported and secured by ______
staples, straps, cable ties
t/f Type AC cable installed through, or parallel to, framing members shall be protected against physical damage from penetration by screws or nails.
true