PEC Chapter 2 (2.25)
DISCONNECT LOADS BEFORE OPENING CUTOUTS
A permanent legible sign shall be installed for disconnecting means over 1000 volts with fused cutout and shall read _____.
not be
A plaque or directory shall ______ required for large-capacity multibuilding industrial installations under single management, where it is ensured that disconnection can be accomplished by establishing and maintaining safe switching procedures.
Yes
Double throw switch shall be permitted not to comply with up being the on position since it has a lot of on position.
True
Each building or structure disconnect shall simultaneously disconnect all ungrounded supply conductors it controls and shall have a fault-closing rating not less than the maximum available short-circuit current available at its supply terminals.
True
Each protective, switching, and control circuit shall be adjusted in accordance with the system design and tested by actual operation using current injection or equivalent methods as necessary to ensure that each and every such circuit operates correctly.
900 mm
Final spans in clearances from buildings for 1000 volts less conductors, shall be permitted to be attached to the buildings, but they shall be kept at greater than ______ from window that are designed to be opened, and from doors, porches, balconies, ladders, stairs, fire escapes, or similar locations.
True
In a multiple-occupancy building where electric supply and electrical maintenance are provided by the building management and where these are under continuous building management supervision, the supply disconnecting means supplying more than one occupancy shall be permitted to be accessible to authorized management personnel only.
False
In a multiple-occupancy building, each occupant shall not have access to the occupant's supply disconnecting means.
12 m
In all spans exceeding _____, conductors in festoon lighting shall be supported by messenger wire.
100 mm
Open conductors shall be separated from open conductors of other circuits by greater than _____
Protective Relays
Shall be demonstrated to operate by injecting current or voltage, or both, at the associated instrument transformer output terminal and observing that the associated switching and signaling functions occur correctly and in proper time and sequence to accomplish the protective function intended.
Instrument Transformers
Shall be tested to verify correct polarity and burden.
Metering Circuits
Shall be verified to operate correctly from voltage and current sources in a similar manner to protective relay circuits.
contribute
Since we permit disconnecting means not to simultaneously disconnect if fused, where fused switches or separately mounted fuses are installed, the fuse characteristics shall be permitted to _____ to the fault closing rating of the disconnecting means.
plainly indicate
The building or structure disconnecting means shall ______ whether it is in the open or closed position
rubber-covered or thermoplastic
The conductor insulation for festoon lighting shall be of the _____ type.
six
The disconnecting means for each supply shall consist of not more than _____ switches or _____ circuit breakers mounted in a single enclosure, in a group of separate enclosures, or in or on a switchboard. There shall be no more than _____ disconnects per supply grouped in any one location.
Instrument Transformers, Protective Relays, Switching Circuits, Control and Signal Circuits, Metering Circuits, Acceptance Tests, Relays and Metering Utilizing Phase Differences
What are needed to be pre-energized and tested to be presented to OBO/EE?
staggered
Where outdoor lampholders are attached as pendants, the connections to the circuit wires shall be ______.
Control and Signal Circuits
shall be observed to perform its proper control function or produce a correct signal output
terminal or bus
A ______ to which all grounded conductors can be attached by means of pressure connectors shall be permitted for this purpose of disconnecting grounded conductor.
900 mm
A. From other structures such as signs, chimneys, radio and television antennas, tanks, and other nonbuilding or nonbridge structures, clearances - vertical, diagonal, horizontal - shall not be less than _____.
1800 mm, 2500 mm
A. If buildings exceed three storeys or 15 m in height, overhead lines shall be arranged so that a clear space at least ______ wide will be left either adjacent to the buildings or beginning not over ______ from them to facilitate the raising of ladders when necessary for firefighting.
Relays and Metering Utilizing Phase Differences
All ______ that use phase differences for operation shall be verified by measuring phase angles at the relay under actual load conditions after operation commences.
2.25
Article number for outside branch circuits and feeders
115, 265
Circuits exceeding _____ volts between conductors and _____ between ground and unground, shall be permitted to supply luminaires for illumination of outdoor areas of industrial establishments, office buildings, schools, stores, and other commercial or public buildings.
True
Clearances for special cases such as where crossings will be made over lakes, rivers, or areas using large vehicles such as mining operations, specific designs shall be engineered considering the special circumstances.
2700 mm
Clearances from Buildings for less than 1000 volts above roofs shall have vertical clearance of _____.
3000 mm
Clearances of overhead conductors above finished grade, sidewalks or from any platform or projection that will permit personal contact where the voltage does not exceed 150 volts to ground and accessible to pedestrians only.
3.5 square millimeters
Conductors in festoon lighting shall not be smaller than _____ unless supported by messenger wiring.
300 mm
Conductors on poles shall have a separation of not less than _____ where not placed on racks or brackets.
shall not
Conductors or messenger wires _____ be attached to any fire escape, downspout, or plumbing equipment.
not
Conductors shall _____ be attached to a mast where the connection between a weatherhead or the end of conduit and coupling if the coupling is located above the last point of securement to the building or other structure, or where the coupling is located above the building or structure,
True
Conductors shall not be installed beneath openings through which materials may be moved, such as openings in farm and commercial buildings, and shall not be installed where they obstruct entrance to these openings.
mechanical linkage
Disconnecting means for over 1000 volts shall be readily accessible, if not, it shall be operable by _____ from a readily accessible point.
Switching Circuits
Each shall be observed to operate the associated equipment being switched.
60
For a one-family dwelling, the feeder disconnecting means shall have a rating of greater than _____ amperes, 3-wire.
True
For clearances from buildings for less than 1000 volts, if the roof surface is subject to pedestrian or vehicular traffic, the clearance shall be like the overhead conductors clearance.
900 mm
For clearances from buildings for less than 1000 volts, the vertical clearance above the roof level shall be maintained for a distance not less than _____ in all directions from the edge of the roof.
30
For installations consisting of less than two 2-wire branch circuits, the feeder or branch-circuit disconnecting means shall have a rating of greater than _____ amperes.
True
For installations under single management, where documented safe switching procedures are established and maintained for disconnection, and where the installation is monitored by qualified individuals, the disconnecting means shall be permitted to be located elsewhere on the premises.
True
For lighting equipment installed outdoors, the ampacity of the neutral conductor shall not be less than the maximum net calculated load current between the neutral conductor and all ungrounded conductors connected to any one phase of the circuit
readily accessible, remote-control
For multibuilding industrial installations under single management, the disconnecting means for over 1000 volts shall be electrically operated by a ________ device in a separate building or structure.
900 mm
Horizontal clearances from buildings for conductors of 1000 volts or less shall be _____.
15 m
If buildings exceed three storeys or ______ in height, overhead lines shall be arranged so that a clear space at least 1800 mm wide will be left either adjacent to the buildings or beginning not over 2500 mm from them to facilitate the raising of ladders when necessary for firefighting.
sealed
If the raceway enters the building or structure from outside, it shall be ______. Spare or unused raceways shall also be _______.
True
One of the two to six disconnecting means which are required to be grouped, where used only for a water pump also intended to provide fire protection, shall be permitted to be located remote from the other disconnecting means.
glass, porcelain
Open conductors shall be supported on knobs, racks, brackets, or strain insulators, that are made of _____ or other approved materials
no requirements
Open-Conductors when supported on poles, shall have horinzontal climbing space of _____ for communications conductors alone.
600 mm
Open-Conductors when supported on poles, shall have horinzontal climbing space of _____ for power conductors alone or above communication conductors, 300 volts or less.
750 mm
Open-Conductors when supported on poles, shall have horinzontal climbing space of _____ for power conductors alone or above communication conductors, 300 volts over.
750 mm
Open-Conductors when supported on poles, shall have horinzontal climbing space of _____ for power conductors below communication conductors.
drain
Raceways on exteriors of buildings or other structures shall be arranged to ______ and shall be suitable for use in wet locations.
True
The complete electrical system design, including settings for protective, switching, and control circuits shall be prepared in advanced and made available on request to the Office of the Building Official/EE and shall be performance tested when first installed on-site.
a manually operable switch or a circuit breaker equipped with a handle
The disconnecting means shall consist of either (1) ______ or other suitable operating means or (2) a power-operable switch or circuit breaker, provided the switch or circuit breaker can be opened by hand in the event of a power failure.
a power-operable switch or circuit breaker
The disconnecting means shall consist of either (1) a manually operable switch or a circuit breaker equipped with a handle or other suitable operating means or (2) ______, provided the switch or circuit breaker can be opened by hand in the event of a power failure.
circuit breaker, molded case switch, general-use switch, snap switch
The disconnecting means specified shall be comprised of _____ or other approved means.
thermoset or thermoplastic
The insulation in cables or raceways for outside branch circuit and feeders (Except MI) shall be of ______ type and, in wet locations.
shall not be required
The isolating switch in over 1000 volts ______ where the disconnecting means is mounted on removable truck panels or metal- enclosed switchgear units that cannot be opened unless the circuit is disconnected and that, when removed from the normal operating position, automatically disconnect the circuit breaker or switch from all energized parts.
braces or guys
The mast shall have adequate strength or be supported by ______ to safely withstand the strain imposed by the overhead feeder or branch circuit conductors.
strain
The messenger wire in festoon lighting shall be supported by ______ insulators.
True
The one or more additional disconnecting means for fire pumps or for emergency, legally required standby or optional standby system shall be installed sufficiently remote from the one to six disconnecting means for normal supply to minimize the possibility of simultaneous interruption of supply.
True
The requirement for maintaining 900 mm from the edge of the roof shall not apply to the final conductor span where the conductors are attached to the side of the building.
grouped, marked
The two to six disconnects as permitted shall be _____. Each disconnect shall be _____ to indicate the load served.
True
This plaque identification shall not be required for branch circuits installed from a dwelling unit to a second building or structure
six
Two or three single-pole switches or breakers capable of individual operation shall be permitted on multiwire circuits, one pole for each ungrounded conductor, as one multipole disconnect, provided they are equipped with handle ties or a master handle to disconnect all ungrounded conductors with no more than _____ operations of the hand.
plaque or directory
Where a building or structure has any combination of feeders, branch circuits, or services passing through it or supplying it, a permanent ______ shall be installed at each feeder and branch-circuit disconnect location denoting all other services, feeders, or branch circuits supplying that building or structure or passing through that building or structure and the area served by each.
readily accessible
Where a feeder overcurrent device is not readily accessible, branch-circuit overcurrent devices shall be installed on the load side, shall be mounted in a _____ location, and shall be of a lower ampere rating than the feeder overcurrent device.
isolating switch
Where oil switches or air, oil, vacuum, or sulfur hexafluoride circuit breakers constitute a building disconnecting means, an ______ with visible break contacts shall be installed on the supply side of the disconnecting means and all associated equipment. this pertains to over 1000 volts.
insulation
Where such lampholders have terminals of a type that puncture the _____ and make contact with the conductors, they shall be attached only to conductors of the stranded type.
True
Where the building or structure disconnecting means does not disconnect the grounded conductor from the grounded conductors in the building or structure wiring, other means shall be provided for this purpose at the location of disconnecting means.
3000 mm
Where within _____ of any building or structure other than supporting poles or towers, open individual (aerial) overhead conductors shall be insulated for the nominal voltage.
Test Report
______ covering the results of the tests required shall be delivered to the office of the building official/ee prior to energization.
Hubs
______ intended for use with a conduit serving as a mast for support of feeder or branch circuit conductors shall be identified for use with a mast.
Acceptance Test
shall be performed, after the substation installation is completed on all assemblies, equipment, conductors, and control and protective systems, as applicable, to verify the integrity of all the systems.
265, 1000
Circuits exceeding _____ volts, nominal to ground, and not exceeding _____ volts between conductors shall be permitted to supply the auxiliary equipment of electric discharge lamps.
5500 mm
Clearances for overhead conductors less than 1000 volts over public streets, alleys, roads, parking areas subject to truck traffic, driveways, on other than residential property, and other land traversed by vehicles, such as cultivated, grazing forest, and orchard.
4500 mm
Clearances for overhead conductors over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does exceed 300 volts to ground.
3700 mm
Clearances for overhead conductors over residential property and driveways, and those commercial areas not subject to truck traffic where the voltage does not exceed 300 volts to ground.
not be
Disconnecting means used solely for the control circuit of the ground-fault protection system, or the control circuit of the power-operated supply disconnecting means, installed as part of the listed equipment, shall _____ considered a supply disconnecting means.
simultaneously
Each building or structure disconnecting means shall ______ disconnect all ungrounded supply conductors that it controls from the building or structure wiring system.
20
For a single circuit as permitted for areas with less than 50 meter squared, the branch circuit disconnect means shall have a rating of greater than _____ amperes.
60
For all other installations, the feeder or branch- circuit disconnecting means shall have a rating of greater than _____ amperes.
15
For one-circuit installation of rating of disconnect. For installations to supply only limited loads of a single branch circuit, the branch circuit disconnecting means shall have a rating of not less than _____ amperes.
True
For towers or poles used as lighting standards, the disconnecting means shall be permitted to be located elsewhere on the premises.
"on"
For uniform position of disconnecting means, when disconnecting means handles are operated vertically, the "up" position of the handle shall be the _____ position.
True
If the individual disconnecting means consists of a fused cutout, the simultaneous disconnection of all ungrounded supply conductors required in disconnecting means shall not be required if there is a means to disconnect the load before opening the cutouts for over 1000 volts.
900 mm
If the voltage does not exceed 300 and the roof has a slope of 100 mm rise over 300 mm run or greater slope, a reduction of _____ shall be permitted.
100 mm rise over 300 mm run
If the voltage does not exceed 300 and the roof has a slope of ______ or greater slope, a reduction of 900 mm shall be permitted.
1800 mm, 1200 mm
If the voltage does not exceed 300, reduction of clearance to only 450 mm shall be permitted if not more than _____ of conductors are above and the horizontal length of the roof is only _____, and they are terminated at a through-the-roof raceway or approved support.
300
If the voltage does not exceed _____ and the roof has a slope of 100 mm rise over 300 mm run or greater slope, a reduction of 900 mm shall be permitted.
True
In a multisection switchboard, disconnects for the grounded conductor shall be permitted to be in any of the switchboard, provided any such switchboard is marked that it containes grounded conductor disconnect.
True
Lamps for outdoor lighting shall be below all energized conductors, transformers, or other electric utilization equipment, unless equipment is controlled by a disconnecting means that is lockable.
relamping operations
Lamps for outdoor lighting shall be below all energized conductors, transformers, or other electric utilization equipment, unless o clearances of other safeguards are provided for ______.
readily accessible
Locations shall be either indoor or outdoor or where the conductors pass through the building. The disconnecting means shall be at a _______ location nearest the point of entrance of conductors.
greater than
The feeder or branch-circuit disconnecting means shall have a rating of ______ the load to be supplied.
900 mm
The vertical clearance of final spans above or within _____ measured horizontally of platforms, projections, or surfaces that will permit personal contact shall be maintained.
