Can Overhead Service Wire Be Put In Conduit
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The Service D rop
The overhead service driblet , or underground service lateral, are the electrical conductors that come from the utility pole , pedestal or ground-mounted transformer to the dwelling. Changes to the service drib will ever be completed by the utility company , and the price for nigh changes are the responsibility of the customer. The major safety issue here is that the service drop conductors take no fuse , excursion breaker or any kind of overcurrent protection at their supply end ; they are dir ectly connected to the utility ' s distribution filigree and are energized at all times .
In that location are three conductors coming to the service mast in the overhead service drop , ii ungrounded conductors ( hot legs ) and a dissever grounded conductor ( neutral ) . The hot legs take black thermoset, polymer or other nonmetallic conductor insulat ion . If all iii wires are connected to the service mast that runs through the roof , and/or downwards the outside wall of the house in a service-entrance conduit , you lot can commonly assume there is 2 4 0 – volt service for the house since each hot leg measures 120 – volts from each hot leg to the neutral .
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Who Owns What?
Power line regulations and responsibilities will vary from one municipality to another and volition depend on whether a ability line is public or private. Public lines are installed and owned by a public utility company. Sometimes they are on public property, simply sometimes they are on private property. Utility companies ain everything up to the service bespeak, the point of connection between the serving utility and the firm bounds wiring system , and the service signal is often on individual belongings . Different utility companies define where that service signal is exactly located , and information technology tin vary greatly depending on whether the electrical service is overhead or underground, the size of the electrical service rated in amperes, where it originates at the utility equipment, and where it terminates at the customer's equipment . Private ly owned electrical distribution lines are sometimes found in gated communities, flat complexes, mobile home and RV parks, college campuses, big industrial facilities and elsewhere.
And so if a tree does fall on a mast or service drib, the nautical chart above volition give you an idea who is responsible for what, but it ultimately depends on where y'all live and which utility company services you lot.
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The Mast Has I Purpose
For safety reasons, d o non attach television, telephone, cable or other wires to the service mast. Only the electrical util ity conductors are permitted to exist attached to the service mast.
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Avoid Copse
Be certain the overhead service drib conductors are free and articulate of trees, limbs, droppings and vegetation. T rees that grow upwards into service conductors can damage the conductors and attract lightning strikes , both of which cause many power outages every year. Remember, a 4-f oo t tall, ii -f oot wide tree might abound to be 60 -feet tall and 30 -anxiety wide. Some utility companies have instituted tree replacement programs to assist customers in properly planting the correct trees in the right place to avoid futurity problems . For information almost growth potential and planting near power lines, c ontact your utility company, your County Extension office, Land'southward Department of Agronomics office, District Forester, or local nursery.
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C learances for Service Drops
- Except at the baste loop, at due north o time less than 12-feet above final grade
- Where overhead service drib conductors end at a through-the-roof raceway or mast, there is a m aximum of vi -feet of conductor length over the roof
- A grand inimum of 18 – inches of clearance above whatsoever role of a sloped roof
- The service mast must exist no more than 4 -feet from the edge of the roof measuring horizontally
- The service mast should not be more 3-f eet vertically above the roof line ; most utilities will require bracing or guy wires for additional back up of any mast that is taller than iii-anxiety.
- Flat roofs need to have at least eight-feet of clearance and balconies need at to the lowest degree ten -anxiety of clearance
- O verhead conductors must accept a horizontal clearance of 3-feet from all windows that can be opened, doors, porches, balconies, ladders, stairs, fire escapes, or like locations. No one should be able to take hold of a service conductor from these areas .
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Additional C learances for Overhead Service D rop Conductors
- W hen located near a swimming pool, the overhead service conductors must be at least 10 -feet away from the pool horizontally and at least 22 .five -feet high .
- If the home has a flat roof, in that location must be 8 -feet of clearance , and if your dwelling has a pitch roof of 4 – inches in 12-inches , or greater , there must exist a minimum of 3 -feet of clearance .
- W hen the voltage to basis does non exceed 150 -volts , there must exist x -feet of clearance from the everyman bespeak of the baste loop at the electric service entrance to buildings and the finished grade, w alkways , decks, patios, etc. The clearance is raised to 12 -anxiety where the voltage does not exceed 300 volts to ground , and raised to15 -anxiety where the voltage to ground exceed s 300 volts.
- T here must be an 18 -f oot clearance over public streets, alleys, roads, parking areas that may have truck traffic, driveways other than on residential holding, and areas used by farming and structure vehicles .
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Service Driblet Drip Loop
The overhead service drib conductors are spliced to the service-entrance conductors at the home. This connection is called the drip loop . The baste loop is required to keep h2o from traveling forth the length of the service-entrance conductors and entering the service-entrance conduit at the weatherhead . Overhead service-entrance conductors are fastened to service masts with clamp-on porcelain or similar nonmetallic insulators. Overhead service-entrance conductors that finish at the side of a house, under a roof eave , or on the roof fascia board are fastened to screw-in porcelain or like nonmetallic insulators.
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Flashing
Service masts that penetra te the roof must have a roofing boot properly secured at the roof line to foreclose water leaks. The roofing boot must be properly sealed, glued and screwed flush with the roof membrane. If nails are used, they must be sealed properly. Nails can corrode over time and the membrane can carve up so exist sure to employ the correct tools for the job and take the time to be sure it is properly sealed. Mast brac ing must besides exist sealed with flashing at the roof line intersection.
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Supporting a mast higher up the roof
The typical service mast consists of 2-inch rigid metal conduit . Sometimes you 'll see a through -the-roof service mast that appears to be leaning from tension in the overhead service drop conductors . This can be repaired by adding a brace , necktie dorsum or guy-wire supports. Masts over 36- inches usually require a mast brace or necktie – back supports such as a No. half-dozen Copperweld Aircraft Cable ; although some municipalities allow the mast to be as much every bit 5 -anxiety to a higher place the roof line earlier needing a guy wire for extra support . The caryatid must be installed at a minimum 45-deg ree angle.
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Supporting a Mast Beneath the Roof
The service mast must be p 50 umb (not leaning) and properly fastened to the frame of the home by installing securely fastened metallic conduit straps every 3 -feet . Malleable pipage straps and 4-inch lag screws in studs may sometimes be substituted. T here will be a raintight threaded conduit hub where the service mast enters the top of the meter socket enclosure .
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The Meter
Electrical utilities often crave the meter to be mounted 4-anxiety to 6-anxiety from the ground , which is a reasonable tiptop for utility workers to do their chore in a condom manner . Meter bases for the sockets are furnished at no cost in most areas .
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Underground power lines
Utility companies install electrical distribution either beneath ground or to a higher place ground , and they make the decision on which i will be used in your installation. The long-term overall cost is less for overhead electrical distribution compared to underground distribution , but sometimes the utility will install surreptitious distribution , but it comes with an additional installation and maintenance toll to the property owner. T he location of the electric meter will be determined by the electric utility based on the size of the service, the type of service and the type of distribution equipment, such as a transformer or distribution pedestal .
Prophylactic
Utility companies are very strict when it comes to breaking seals or removing meters . In improver to the obvious safety hazards, liability and theft of electricity are major concerns for utility companies. Always consult with the utility company before accessing the interior of the meter socket enclosure or attempt repairs to a service mast.
Well-nigh the author
Lisa Archer, Possessor of BPG/Memphis Inspections Service & Nationwide Pest Command
901-826-7500
www.memphisinspections.com
Find out more about Xcel's requirements hither
Source: https://www.familyhandyman.com/list/what-you-need-to-know-about-electrical-service-masts/
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