Article 230- Services
Overhead service conductors shall have a horizontal clearance of not less than _____ ft from a pool.
10
For installations that supply only limited loads of a single branch circuit, the service disconnecting means shall have a rating not less than _____.
15A
The minimum clearance for overhead service conductors not exceeding 1,000V that pass over parking areas subject to truck traffic is _____ ft.
18
Service conductors installed as unjacketed multiconductor cable shall have a minimum clearance of _____ ft from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations.
3
If the voltage between overhead service conductors does not exceed 300V and the roof area is guarded or isolated, a reduction in clearance to _______ is permitted.
3 ft
For installations consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than _____.
30A
Underground copper service conductors shall not be smaller than _____ AWG copper.
8
The minimum size service-drop conductor permitted is _____ AWG copper or _____ AWG aluminum or copper-clad aluminum.
8, 6
The surge protective device (SPD) required for a dwelling unit service shall be _____.
Type 1 or 2
Overhead service conductors or service equipment _______ be supported to hardwood trees.
can not
A building or structure shall be supplied by a maximum of _____ service(s), unless specifically permitted otherwise.
one
The general requirement for each service drop, set of overhead service conductors, set of underground service conductors, or service lateral is that it shall supply _____ set(s) of service-entrance conductors
only one
Service conductors supplying a building or other structure shall not _____ of another building or other structure.
pass through the interior
Where a building or structure is supplied by more than one service, a _____________________ shall be installed at each service disconnect location denoting all other services supplying that building or structure and the area served by each.
permanent plaque or directory
When the service disconnecting means is a power-operated switch or circuit breaker, it shall be able to be opened by hand in the event of a _____.
power supply failure
Service-entrance cables which are not installed underground, where subject to physical damage, shall be protected by _____.
rigid metal conduit, IMC, or Schedule 80 PVC conduit
Wiring methods permitted for service-entrance conductors include _____.
rigid metal conduit, electrical metallic tubing, and PVC conduit
Ground-fault protection of equipment shall be provided for solidly grounded wye electrical services of more than 150 volts-to-ground, but not exceeding 1,000V phase-to-phase for each service disconnecting means rated _____ or more.
1,000A
Overhead service conductors shall have a minimum clearance from final grade of _____ ft above areas or sidewalks accessible only to pedestrians, measured from final grade or other accessible surface where the voltage does not exceed 150 volts-to-ground.
10
The minimum point of attachment of overhead service conductors to a building shall not be less than _____ ft above finished grade.
10
For a one-family dwelling, the service disconnecting means shall have a rating of not less than _____, 3-wire.
100A
Overhead service conductors shall have a minimum vertical clearance of _____ ft from final grade over residential property and driveways, as well as over commercial areas not subject to truck traffic where the voltage does not exceed 300 volts-to-ground.
12
Underground service conductors that supply power to limited loads of a single branch circuit shall not be smaller than _____.
12 AWG copper
Overhead service conductors installed over roofs shall have a vertical clearance of not less than _____ ft above the roof surface, unless a lesser distance is permitted by an exception.
8
Electrical equipment shall not be connected to the supply side of the service disconnecting means, except for a few specific exceptions such as _____.
Type 1 surge-protective devices, taps used to supply standby power systems, fire pump equipment, fire and sprinkler alarms, and load (energy) management devices, and solar photovoltaic systems
Service heads on raceways or service-entrance cables and goosenecks in service-entrance cables shall be located _____ the point of attachment, unless impracticable.
above
Underground service conductors shall have _____.
adequate mechanical strength and sufficient ampacity for the loads calculated
The minimum service-entrance conductor size shall have an ampacity not less than the maximum load to be served after the application of any _____ factors.
adjustment and correction
Where exposed to the weather, raceways enclosing service-entrance conductors shall be _____ for use in wet locations and arranged to drain.
approved or listed
Service entrance conductors shall be continuous and______ permitted to be spliced or tapped.
are
Solar photovoltaic systems, fuel cell systems, wind electric systems, energy storage systems, or interconnected electric power production sources _____________ to be connected to the supply side of the service disconnecting means.
are permitted
Additional services shall be permitted for different voltages, frequencies, or phases, or for different uses, such as for _____.
different rate schedules
Where conduits are used as service masts, hubs shall be _____ for use with service-entrance equipment.
identified
The surge protective device (SPD) required for a dwelling unit shall be an integral part of the service equipment or be located immediately adjacent thereto and __________ to be located in the downstream panelboard.
is permitted
Meter sockets supplied by and under the exclusive control of an electric utility shall not be required to be _____.
listed
Individual meter socket enclosures shall not be considered service equipment but shall be _____ for the voltage and ampacity of the service.
listed and rated
The service disconnecting means rated 1,000V or less shall be marked to identify it as being suitable for use as service equipment and shall be _____.
listed or field evaluated
To prevent the entrance of _____, service-entrance conductors shall be connected to the service-drop or overhead service conductors either below the level of the service head or below the level of the termination of the service-entrance cable sheath.
moisture
On a three-phase, 4-wire, delta-connected service where the midpoint of one phase winding is grounded, the service conductor having the higher phase voltage-to-ground shall be durably and permanently marked by an outer finish that is _____ in color, or by other effective means, at each termination or junction point.
orange
Overhead service-entrance cables shall be equipped with a _____.
service head
Conductors other than service conductors shall not be installed in the same _____ in which the service conductors are installed.
service raceway or cable
Underground service-entrance conductors _____ be protected against physical damage.
shall
Barriers shall be placed in service equipment such that no uninsulated, ungrounded service busbar or service _____ is exposed to inadvertent contact by persons or maintenance equipment while servicing load terminations.
terminal
A meter-mounted transfer switch shall be listed and be capable of transferring _____.
the load served
The requirement to maintain a 3-ft vertical clearance from the edge of a roof does not apply to the final conductor span where the service drop is attached to _____.
the side of a building
Where a service raceway enters a building or structure from a(an) _____, it shall be sealed in accordance with 300.5(G).
underground distribution system
Each _____ service conductor shall have overload protection.
ungrounded
Service-entrance and overhead service conductors shall be arranged so that _____ will not enter the service raceway or equipment.
water
If a set of 120/240V overhead service conductors terminate at a through-the-roof raceway or approved support, with less than 6 ft of these conductors passing over the roof overhang, the minimum clearance above the roof for these service conductors shall be _____.
18 in
For one- and two-family dwelling units, all service conductors shall terminate in an emergency disconnecting means having a short-circuit current rating equal to or greater than the _____, installed in a readily accessible outdoor location.
available fault current
As defined by 230.95, the rating of the service disconnect shall be considered to be the rating of the largest _____ that can be installed or the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted.
fuse
When the service contains two to six service disconnecting means, they shall be _____.
grouped
All services in dwelling units ________ provided with a surge protective device (SPD).
shall be
One set of service-entrance conductors connected to the supply side of the normal service disconnecting means __________ permitted to supply standby power systems, fire pump equipment, and fire and sprinkler alarms covered by 230.82(5).
shall be
Where dwelling unit service equipment is replaced, a surge protective device (SPD) ___________ installed.
shall be
Where fuses are used as the service overcurrent device, the disconnecting means _______ located ahead of the supply side of the fuses in accordance with 230.91.
shall be
Grounding electrode conductors or supply-side bonding jumpers or conductors ________ within raceways containing service conductors.
shall be permitted
The additional service disconnecting means for fire pumps, emergency systems, legally required standby, or optional standby services, shall be installed remote from the one to six service disconnecting means for normal service to minimize the possibility of _____ interruption of supply.
simultaneous
There shall be no more than _____ disconnects installed for each service or for each set of service-entrance conductors as permitted in 230.2 and 230.40.
six
Service conductors shall be considered outside of a building or other structure where installed under not less than _____ in. of concrete beneath a building or other structure.
2
Service conductors and equipment for control and protection of services and their installation requirements are covered in Article _____.
230
The vertical clearance of final spans of overhead service conductors above, or within _____ ft measured horizontally of platforms, projections, or surfaces that will permit personal contact shall be maintained in accordance with 230.24(B).
3
Service-entrance cables mounted in contact with a building shall be supported at intervals not exceeding _____.
30 in.
Underground service conductors shall be protected from damage in accordance with _____ including minimum cover requirements.
300.5
Service conductors shall not be installed beneath openings through which materials may be moved and ___________ be installed where they will obstruct entrance to these buildings\' openings.
shall not
Additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by _____.
special permission
Service-drop conductors shall have _____.
sufficient ampacity to carry the load and adequate mechanical strength
