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- #Eye bolt sizes for electrical service connection install
- #Eye bolt sizes for electrical service connection windows
Size the neutral service-drop conductor to carry the maximum unbalanced load, per 220.61, but don't size it smaller than required by 250.24(C) and Table 250.66. Ungrounded service-drop conductors can't be smaller than 8 AWG copper or 6 AWG aluminum, except in limited-load installations, where they can be as small as 12 AWG. Service-drop conductors must have adequate mechanical strength, and they must have sufficient ampacity to carry the load as calculated in Art. Finally, don't use vegetation as support.
#Eye bolt sizes for electrical service connection install
3).ĭon't install service conductors under an opening through which materials might pass, nor where they will obstruct entrance to building openings. If no more than 6 ft of conductors pass over no more than 4 ft of roof, 120/208V or 120/240V conductor clearances over the roof overhang can be reduced to 18 in. of horizontal run, 120/208V or 120/240V conductor clearances can be reduced to 3 ft over the roof. This vertical clearance must be maintained for 3 ft, measured horizontally from the platform, projections, or surfaces from which people might reach them, except: Maintain a vertical clearance of at least 10 ft above platforms, projections, or surfaces from which people might reach an overhead conductor. If they run above a window, you don't have to maintain the 3 ft distance to that window ( Fig.
#Eye bolt sizes for electrical service connection windows
They must also be at least 3 ft from windows that open. Overhead service conductors installed in a cable, or as individual open conductors, must be at least 3 ft from doors, porches, balconies, ladders, stairs, fire escapes, or similar locations. This rule doesn't prohibit the mixing of service, feeder, and branch-circuit conductors in the same service equipment enclosure ( Fig. Nor can you install them in the same raceway or cable with feeder or branch-circuit conductors. Service conductors must not pass through the interior of another structure. The reason for this requirement is to minimize the possibility of accidental interruption. If you are using a separate service for a fire pump, emergency system, or standby power system, the disconnect must be located remotely away from the normal power disconnect. If you want a separate service for emergency or legally required systems, you must get AHJ approval for it.
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Where a structure is supplied by more than one service - or a combination of feeders and services - you must install a permanent plaque or directory at each service or building disconnect location to denote all other services and feeders supplying that structure (and the area served by each). You can also have additional services for different voltages, frequencies, or phases - or for different uses, such as for different electricity rate schedules. Where the capacity requirements exceed 2,000A, or where the load requirements of a single-phase installation exceed the utility's capacityīy written consent of the AHJ Multiple-occupancy buildings where there's no available space for supply equipment accessible to all occupantsĪ building or other structure so large that two or more supplies are necessary Systems designed for connection to multiple sources of supply for the purpose of enhanced reliabilityįor special occupancies, and with written consent from the Authority Having Jurisdiction (AHJ)
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Therefore, they have no definitions or requirements.Ī building or structure can be served by only one service drop or service lateral. Utility-owned conductors before the service point are outside of the scope of the NEC. Service drop conductors and underground lateral conductors are the conductors coming from the service point to the service entrance conductors or, sometimes, directly to the service equipment itself. We will address those in Part 2 of this article. 230 provide requirements for service-entrance conductors and service equipment. The first includes general requirements, overhead service drop conductors, and underground lateral conductors.
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230 divides neatly into three general “blocks” of coverage.