Chapter 5 Flashcards
Equipment grounding conductors, in general when they are insulated, shall be provided with an outer finish that is ___ in color
green
A(n) ___ is a circuit breaker with an intentional delay between the time when the fault or overload is sensed and the time when the CB operates.
inverse-time-circuit-breaker–ITCB-
Overcurrent protective devices are permitted to be installed in clothes closets if they are located at least 12” from combustible materials.
False
All conductors installed in electrical distribution systems shall be insulated.
False
Circuit breakers shall clearly indicate whether they are in the open or closed position.
True
___ is generated when current flows through a conductor.
Heat
Conductors used for direct burial shall be identified for such use.
True
Plug fuses have a voltage rating of ___ V between conductors in most applications.
125
Copper and aluminum conductors shall not be terminated in a manner that causes the dissimilar metals to come in direct contact with each other.
True
The three basic classifications of insulation ratings are 60°C (140°F), 75°C (167°F), and ___°C (194°F).
90
Circuit breakers used as switches for a 120 V fluorescent lighting circuit shall be listed and marked “SWD” or “HID”.
True
Insulated conductors installed in wet locations shall be of a type ___ for the use.
listed
A(n) ___ is any current in excess of that for which the conductor or equipment is rated.
overcurrent
The next ___ standard size OCPD of 800 A or less is permitted to be used where the OCPD does not correspond to a standard size.
higher
Ampacity of feeder taps not over 25’ shall not be less than 1/3 of the rating of the overcurrent protective device protecting the ___ conductors.
feeder
Plug fuses of 15 A and lower are identified by a(n) ___ configuration of the fuse window.
hexagonal
The maximum standard rating for a fuse is 5000 A.
False
In general, fuses and circuit breakers shall not be connected in ___.
parallel
Type S fuses are designed for circuits not exceeding 100 V.
False
___ AWG and larger ungrounded conductors installed in a raceway that enters a box shall be protected by an identified insulating fitting.
4
A(n) ___ fuse is a plug fuse that incorporates a screw configuration that is interchangeable with fuses of other ampere ratings.
Edison-base
When conductors are run in parallel in separate raceways, the raceways shall have the same ___ characteristics.
Electrical
Insulated conductors are the most common conductors installed in electrical systems.
True
___ conditions include installations where the conductors are exposed to oils, greases, vapors, etc. that break down the integrity of the conductors’ insulation.
Corrosive
THW conductors are permitted to be installed in wet locations.
True
Paralleled conductors shall all be the same length.
True
No conductor shall be installed in such a manner that the operating temperature of its ___ is exceeded.
Insulation
Locations can be classified as either dry, ___, or wet.
damp
Overcurrent devices are permitted in bathrooms.
False
Flexible cords and cables shall be protected against overcurrent in accordance with their ampacities.
True
Cartridge fuses with no markings are rated for ___ A.
10000
The least potentially damaging overcurrent occurs when there is an overload.
True
Circuit breakers that are not marked have an interrupting rating of ___ A.
5000
In general, insulated grounded conductors (neutral) sizes 6 AWG or smaller shall be identified with an outer finish that is white or ___.
Gray
When used for equipment grounding purposes, only covered or insulated conductors are permitted.
False
