Week 7 NEC
individual currents
Minimum ampacity of arc welder conductors supplying a group of welders shall be based on ____ as determined in 630.11(A)
nurse call systems
The critical branch should include blood, bone and tissue banks, critical care systems, and ____.
corrosion resistant
Cable tray systems should be ____.
240.60 and 240.61
Cartridge fuse and fuseholder overcurrent protection provisions are located in ____.
equipped with fully engaged locks
A transformer vault door must be ____.
one-third
A transformer's primary conductor shall have an ampacity at least ________ of the feeder conductors' overcurrent device rating.
effective ground-fault current path
All branch circuits serving patient care areas shall be provided with a(n) ____ by installation in a metal raceway system or a cable having a metallic armor or sheath assembly.
on-site generator(s)
An alternate power source can be ____ driven by some form of prime mover(s).
isolate service busbars
Barriers are required in all service-entrance motor-control centers to ____ and terminals from the remainder of the motor-control center.
connected load
Demand calculations for generator set(s) sizing shall be based on the following: (1) prudent demand factors and historical data, (2) ____, (3) Article 220 feeder calculation procedures, or (4) any combination of the preceding.
far more specialized than
Electrical installation criteria and wiring methods for health care facilities are ____ for a standard commercial or industrial project.
transfer fuel pump
Generator accessories, including but not limited to, the ____, electrically operated louvers, and other generator accessories essential for generator operation, shall be arranged for automatic connection to the alternate power source.
1000
Ground-fault protection of equipment shall be provided for solidly grounded wye electric services of more than 150 volts to ground but not exceeding ____ volts phase-to-phase for each service disconnect rated 1000 amperes or more.
10 seconds
Life safety branch installation and alternate power source connection shall provide that all functions (specified herein) be automatically restored to operation within ____ after interruption occurs.
service-entrance conductors
Means shall be provided to disconnect all conductors in a building (or other structure) from the ____.
150 kVA
One transfer switch shall be permitted to serve one or more branches or systems in a facility with a maximum demand on the essential electrical system of ____.
employ a listed tamper-resistant cover
Receptacles located within the rooms, bathrooms, playrooms, activity rooms, and patient care areas of designated pediatric locations shall be either be listed tamper resistant or shall ____.
no surgical treatment requiring general anesthesia is offered
Requirements in 517.40(C) through 517.44 do not apply to freestanding buildings used as nursing homes and limited care facilities, provided that ____.
not be part of a multiwire branch circuit
The branch circuit serving patient bed locations shall ____.
135
The capacitor circuit conductor's ampacity shall be at least ______ % of the capaitor's rated current.
25 ft
The combined length of one primary plus one secondary conductor (excluding any portion of the primary conductor protected at its ampacity) shall not exceed ____.
Patient Care Vicinity
The space within a patient room no less than 6ft beyond the bed's perimeter (in its normal location), and extending vertically no less than 71.2 ft from the floor is defined as the_______.
Combined calculated loads
The tap conductor's ampacity shall not be less than the ______ on the circuits it supplies.
disconnecting means
Where multiple power supplies serve the same dc system, the dc side of each power supply shall have a ____.
Torque motor
____ branch circuits shall be protected at the motor nameplate current rating.
