Week 7 NEC
polymer insulation
Conductors used in the secondary circuit of electric welders shall have ____.
Eight
Each patient bed location shall have a minimum of ____ receptacles.
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.
resistors
If a crane, hoist, or monorail hoist operates above readily combustible material, specific requirements shall apply to ____.
3/0 AWG copper
If a single raceway supplies an equipment grounding conductor, only one ____ equipment grounding conductor is required.
12.5
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.
Torque motor
____ branch circuits shall be protected at the motor nameplate current rating.
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 ____.
1200 amperes at 250 volts or less
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.
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.
not be part of a multiwire branch circuit
The branch circuit serving patient bed locations shall ____.
ventilation to outside air does not rely on flues or ducts
Wherever such an arrangement is practicable, transformer vaults shall be located so that ____.
nurse call systems
The critical branch should include blood, bone and tissue banks, critical care systems, and ____.
3-in
The flexible cord shall include a storage device that does not subject the cord to less than a ____ bending radius.
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.
125
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.
is intimate to the patient or staff
Wet procedure locations are the areas in a patient care space where a procedure is performed that is normally subject to wet conditions while patients are present, including standing fluids on the floor or drenching of the work area, where either such condition ____.
on-site generator(s)
An alternate power source can be ____ driven by some form of prime mover(s).
Class I, Division 1
Any room (or location) storing flammable anesthetics or volatile flammable disinfecting agents is a ____ location from floor to ceiling.
a different transfer switch
At least one of the receptacles of a patient bed location must be connected to (1) the normal system branch circuit as required or (2) a critical branch circuit supplied by ____ not associated with other receptacles at the same patient bed location.
isolate service busbars
Barriers are required in all service-entrance motor-control centers to ____ and terminals from the remainder of the motor-control center.
service from the same distribution panel(s)
Branch circuits serving only special-purpose outlets or receptacles (such as portable X-ray outlets) do not require ____.
individual currents
Minimum ampacity of arc welder conductors supplying a group of welders shall be based on ____ as determined in 630.11(A)
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 ____.
life safety branch
The ____ of the essential electrical system shall supply power for lighting, receptacles, and equipment in a hospital.
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 ____.
115
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
corrosion resistant
Cable tray systems should be ____.
service-entrance conductors
Means shall be provided to disconnect all conductors in a building (or other structure) from the ____.
600 amperes
A 60-ampere rated conductor is the minimum size allowed if the overcurrent protection on the tap conductor's line side is ______.
life safety branch
A system of feeders and branch circuits supplying power for lighting, receptacles, and equipment essential for life safety that is automatically connected to alternate power sources by one or more transfer switches during interruption of the normal power source is called a ____.
conductor having overcurrent protection ahead of its point of supply
A tap conductor is a ____ that exceeds the value permitted for similar conductors protected as otherwise described in 240.4.
one-third
A transformer's primary conductor shall have an ampacity at least ________ of the feeder conductors' overcurrent device rating.
200-ampere rated conductor
A______ is the minimum size allowed if the overcurrent protection on the tap conductor's line side is 600 amperes
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.
two separate critical branch transfer switches
Critical care space served from ____ shall not be required to have circuits from the normal system.
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.
three separate branches, which are all
Essential electrical systems for hospitals shall be comprised of ____ capable of supplying a limited amount of lighting and power service that is considered essential for life safety and effective hospital operation during the time the normal electrical service is interrupted for any reason.
extra-hard usage
Flexible cords used in hazardous (classified) locations for connection of portable utilization equipment (including lamps operating at more than 8 volts between conductors) shall be of a type approved for ____.
150 kVA
For essential electrical systems under ____, deletion of the time-lag intervals feature for delayed automatic connection to the equipment branch shall be permitted.
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 ____.
in excess of rated ampacity
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.
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 ____.
overload indication based on monitoring systems or devices
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) ____.
disconnecting means
Where multiple power supplies serve the same dc system, the dc side of each power supply shall have a ____.
