Exam 17: Industrial Locations

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

Cartridge fuse and fuseholder overcurrent protection provisions are located in ____.

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

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.

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

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

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

If a single raceway or cable tray is used to supply the equipment, only one ____ is required.

A transformer vault door must be ____.

If the ungrounded supply conductors are larger than 1100 kcmil copper or 1750 kcmil aluminum, the supply-side bonding jumper shall have an area not less than ____ percent of the area of the largest ungrounded supply conductor or equivalent area for parallel supply conductors.

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

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) ____.

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

A transformer's primary conductors shall have an ampacity at least ____ of the feeder conductors' overcurrent device rating.

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.

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.

For the 10-ft feeder tap rule, a 60-ampere rated conductor is the minimum size allowed if the overcurrent protection on the tap conductor's line side is ____.

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

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