Chapter 9 Flashcards
Double-throw knife switches mounted vertically shall be equipped with a locking device to prevent ___ from closing the blades.
gravity
In general, only ungrounded conductors shall be opened by switches.
True
All panelboard cabinets and frames of panelboards shall be connected to an EGC.
True
Snap switch terminals marked CO/ALR are for use with ___ conductors.
aluminum, copper, copper-clad aluminum, all the above
A(n) ___ is an overcurrent protective device with a mechanical mechanism that may manually or automatically open the circuit when an overload condition or short circuit occurs.
Circuit-breaker
Conduits or other raceways including their fittings shall not rise more than ___” above the bottom of switchgear, switchboards, or floor-mounted panelboards.
3”
A space of not less than ___’ shall be provided between the top of a switchboard and a combustible ceiling.
3”
The arrangement of busbars and conductors in switchgear or a switchboard shall be such as to avoid overheating due to ___ effects.
inductive
The two types of wire termination configurations for calculating wire-bending space are ___.
L and S
A(n) ___ is a large single panel, frame, or group of assembled panels with buses, overcurrent devices, and instruments.
switchboard
Panelboards supplied through transformers generally shall have their overcurrent protection located on the ___ side of the transformer.
secondary
A surface-mounted switch installed in a wet location shall be enclosed in a(n) ___ enclosure.
weatherproof
Cabinets or cutout boxes installed in a wet location shall be spaced ___” off the wall to which it is mounted.
1/4”
The center of the grip of the operating handle of a knife switch, when in the highest position, shall not be more than ___ above the floor or working platform.
6ft 7in
An identified ___ is required to be securely installed between adjacent snap switches rated over 300 V.
barrier
