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18 ft over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other areas traversed by vehicles (such as those used for cultivation, grazing, forestry, and orchards) [225.18(4)]. /DecodeParms [ null << /Quality 65 >> ] 9-05-02 RF 1 9/02 TLA TLA JMP 21 REVISED MATERIALS NOTE 6 2 5/03 REVISED NOTE 6 TLA . 1926.1408 (a) (2) (iii) (A) If the voltage is higher than 50kV, the clearance shall be increased 4 in. 3.7 m (12 ft) over residential property and driveways, and those commercial . Thanks to Code Check, we have an excellent graphic to make things clear. McGarry and Madsen, Over residential property and driveways on the property (E) - 12 feet, Over walking surfaces that are only accessible to pedestrians (D) - 10 feet, Over a roof low-slope roof, with less than 4/12 slope (A) - 8 feet, Over a roof with 4/12 slope or more (B) - 3 feet, Over a roof with 4/12 slope or more, within 4 feet of roof edge at eaves (C) - 18 inches, Above decks and balconies, including out 3 feet (G,H) - 10 feet, To the sides and below an openable window (I) - 3 feet, The local electric utility may have different standards, which would override the NEC code. 0000107159 00000 n Why is a leaning electrical service mast dangerous? Attach open conductors to fittings identified for use with conductors, or to noncombustible, nonabsorbent insulators securely attached to the structure [225.16(B) and 230.27]. McGarry and Madsen's home inspection blog for buyers of, site-built, mobile/manfuactured and modular homes. 20 mm. Also, its not necessary look up any code standards to know that the service drop shown below is wrong. 1.2 Meter. Operators should take time to look over the area before extending the boom and should stay at least 30 feet from allpower linesandpower poles. The Art. This is an unusual scenario for residential construction, and would actually increase the clearance requirements when there is vehicular traffic. We recently got an education in the difference between the 12-foot and 10-foot clearance requirements for residential property from Jerry Peck, a retired building inspector and code consultant. >> We are in Florida and provide plenty of information about hurricanes and sinkholes, for example, but nothing on basements and ice dams. One of the exceptions is the most common type of residential overhead electric service type, so we will start with it. Dont use trees or other vegetation to support overhead conductors [225.26]. Should I get a lightning rod system to protect my house? 0000108497 00000 n If installing portable or mobile signs in wet or damp locations [600.10((C)(1) and (2)]: Cords must be junior hard service or hard-service types with an equipment grounding conductor. That distance is the minimum clearance requirement, and it must be in conformance with Table 680.8. /E 108705 Give timely information to the operator so that the required clearance distance can be maintained. Is the latest edition of the National Electrical Code (NEC) the standard used for the electrical system of new homes? The NESC horizontal clearance requirement for electrical lines running adjacent to buildings is 7.5 feet. If you are concerned about or have a question about clearances please call us at 1-800-333-2859 and we will accommodate you in any way we can. So if I understand this correctly then: 225.61 (B) States that above 22kV we increase the distance listed in the table by 0.4" per kV, 69kV - 22kV = 47kV, 47kV x .4" = 18.8" = 1.57' So, Add 1.6' (rounding up). It must remain in place whether the lock is installed or not. Why is undersize electric wiring in a house dangerous? Otherwise, use Art. Safe clearance distance from power lines. This space is necessary not only to allow workers room to perform tasks but also . What does it mean when I find buried yellow "CAUTION" tape when digging a hole in the yard? 1). What is the minimum clearance under an electrical service drip loop of a house? NEC Section 110.26(A) requires a clear space at least 30 inches wide and 36 inches deep if the equipment is likely to be worked on while energized. << Where the circuit is a multiwire branch circuit, the switch or circuit breaker must open all ungrounded conductors simultaneously. /Rotate 0 In a hurry? Why is bundled wiring in an electric panel a defect? The required clearances for electrical service drop wiring are listed here: electrical service wire clearance distance over roadway 18 ft. overhead; electrical service wire clearance distance over roadway driveway 12 ft. overhead; electrical service wire clearance distance over roadway flat roof 8-10 ft. overhead Overhead Lines. And for a more detailed exploration of the requirements as the service wires cross above a roof, see our blog post What is the minimum clearance of overhead electric service drop wires above a house roof? Then install the disconnect within sight of or in the same enclosure with the controller [600.6(A)(2)], and ensure the disconnect is capable of: Disconnecting the sign or outline lighting and the controller from all ungrounded supply conductors. E3604.2.2 Vertical Clearance From Grade. In the case of farm machinery, there is a clear and present danger around power lines. To order more copies of this poster and/or the Safety 6 Brochure, call 1-800-375-2434. 0000091727 00000 n 7.0 CLEARANCES . The cable must be at least 22 AWG. 2. An incandescent or HID lamp or lampholder must have at least 2 in. Code requirements cited may have been changed in a newer code edition, or may not yet be adopted in your area. Service point. 16822 SE 92nd Danna Avenue, The Villages, FL 32162, www.thevillagesbestinspector.com Comments or questions tomcgarryandmadsen@mac.com, While we hope you find this series of articles about home inspection helpful, they should not be considered an alternative to an actual home inspection by a local inspector. If installing a portable or mobile sign in a dry location, the cord can be up to 15 ft long [600.10(D)]. Why is it unsafe to bond neutral and ground wiring at subpanels? Option (2)--20 foot clearance. Power lines carry AC power that can be of a wide range of voltages depending on the capabilities of the transmission lines. In this case, the breaker (not the pushbutton) is the disconnecting means. If the service mast is a through-the-roof installation, meaning that it only penetrates the roof at the overhang to come down to a meter at the exterior wall below, as in the photo above, then the wires are only required to clear the roof by 18 inches. A dedicated spotter who is in continuous contact with the operator. This may be an important consideration if a sign is fed by overhead conductors. When working near transmitter/communication towers where the equipment is close enough for an electrical charge to be induced in the equipment or materials being handled, the transmitter must be deenergized or the following precautions must be taken: The equipment must be provided with an electrical ground. Section 600.5 of the NEC requires a sign outlet for the entrance of each tenant location that is accessible to pedestrians. endobj directions from the edge of the roof. Regulation 17 Minimum height of Overhead lines , ( Wires & Cables ) The minimum heights specified in regulation 17 (see items 4.1 to 4.3) are minimum ground clearances for overhead lines, including the suspension insulators if fitted. 0000091825 00000 n parts or through bolts of power or communication . Conductor Power Supply 12" Comm to Comm 4" midspan Comm to Comm Keep one quarter open for climbing space 9.5' (236) 10' * * 11.5' 12' 15.5' Be aware of arcing (or an electrical or power surge) if you're standing close to downed power lines. Code requirements cited may have been changed in a newer code edition, or may not yet be adopted in your area. When the slope of the roof meets or exceeds 4 in. Pole location adjacent to industry tracks must provide at least a 15 foot clearance from centerline of track when measured at right angles. Do any pre-1960 houses have aluminum wiring? The point of connection between the serving electric utility and the premises wiring. TIP 2 Care should be taken to avoid damage to ground wires and rods. Rural homeowners and farmers should use commercial guidelines since there is a strong likelihood that driveways will be used by service vehicles in rural locations. The calculator provides the minimum approach distance, in feet or meters (depending on your selection), for phase-to-ground and phase-to-phase exposures. /ViewerPreferences << /DisplayDocTitle true >> of vertical rise for every 12 in. /ColorSpace /DeviceRGB For any driveways, alleys, roads, or streets likely to carry vehicles more than 8 feet in height, the guideline is for all power lines to be at least 15.5 feet above the ground measured at their lowest point. In order to install Class 2 power supplies and power sources in electric signs and outline lighting, they must be listed for use with electric signs and outline lighting systems or be a component in a listed sign [600.24(A)]. Building Near Overhead Power Lines Contact Idaho Power (208) 388-2323 {00199919.DOCX; 1} Building Near Overhead Power Lines Page 1 of 2 Revised 11/16 . /Size 210 What are typical aluminum service entrance wire/cable sizes for the electrical service to a house? For an overview of the clearance requirements between utility pole and house, see our blog post. Part 1 - Wire Lines and Communications Cables General Requirements This section applies to all public and private utilities, including electric power, telephone, fiber optics, telegraph, cable television, and other communication and data transmission facilities, both overhead and underground. Poles carrying overhead power and telecommunication lines shall, excepting the urban areas, be erected at least 10.0 metres away from the nearest edge of the roadway, provided also that these are at a minimum distance of 5.0 metres from the nearest line of avenue trees. Do not locate bins on both sides of a high-voltage power line. Power line safety (up to 350 kV)--equipment operations. Make sure you install and support the cable so it is protected from physical damage in accordance with 300.4. We will get it done for you. https://www.facebook.com/ElectricalConstructionMaintenanceMagazine, https://www.linkedin.com/company/electrical-construction-maintenance/, Top Changes to the 2023 National Electrical Code, NEC: Air-Conditioning and Refrigerating Equipment Part 1, NEC: Air Conditioning and Refrigerating Equipment Part 5.