Exam 17: Industrial Locations

Means shall be provided to disconnect all conductors in a building (or other structure) from the ____.

Overload is defined as operation of equipment in excess of normal, full-load rating, or of a conductor ____ that, when it persists for a sufficient length of time, would cause damage or dangerous overheating.

The combined length of one primary plus one secondary conductor (excluding any portion of the primary conductor protected at its ampacity) shall not exceed ____.

Wherever such an arrangement is practicable, transformer vaults shall be located so that ____.

If a crane, hoist, or monorail hoist operates above readily combustible material, specific requirements shall apply to ____.

A tap conductor is a ____ that exceeds the value permitted for similar conductors protected as otherwise described in 240.4.

____ branch circuits shall be protected at the motor nameplate current rating.

To calculate the ampacity of conductors supplying several motors (feeder conductors), multiply the largest motor full-load current (FLC) rating by ____% and add the FLC ratings of all other motors (or loads) in the group.

A ____ is the minimum size allowed if the overcurrent protection on the tap conductor's line side is 600 amperes.

Conductors used in the secondary circuit of electric welders shall have ____.

The capacitor circuit conductor's ampacity shall be at least ____% of the capacitor's rated current.

Barriers are required in all service-entrance motor-control centers to ____ and terminals from the remainder of the motor-control center.

Minimum ampacity of arc welder conductors supplying a group of welders shall be based on ____ as determined in 630.11(A)

Where multiple power supplies serve the same dc system, the dc side of each power supply shall have a ____.

Motor circuits rated 1000 volts, nominal, or less, shall have a disconnecting means with an ampere rating of at least ____% of the motor's full-load current rating.

A transformer vault door must be ____.

Cable tray systems should be ____.

Knife switches rated more than ____, and at over 1000 amperes at 251 to 1000 volts, shall be used only as isolating switches and shall not be opened under load.

Where an orderly shutdown is required to minimize the personnel/equipment hazard(s), a system of coordination based on the following two conditions is permitted: (1) coordinated short-circuit protection and (2) ____.

The tap conductor's ampacity shall not be less than the ____ on the circuits it supplies.