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Valley VRI-iS Installation Manual
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Contents
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Safety8Minimum Working ClearanceTo reduce the risk of injury, all persons require adequate working clearance around the electrical panel or otherelectrical equipment. The table below identifies the minimum working clearance needed. Refer to U.S. Occupa-tional Safety & Health Administration (OSHA) Regulations (Standards - 29 CFR) Safeguards for personnel pro-tection. -1910.303(g)(1)(i), or any other applicable national, state or local regulations, for additional information.MINIMUM WORKING CLEARANCE 0-600 VOLTSWIDTHOF WORKINGCLEARANCEAREAHEIGHTOF WORKINGCLEARANCEAREAMINIMUM WORKING CLEARANCEIN FRONT OF ELECTRICAL PANEL/EQUIPMENTEXPOSED LIVE PARTSON ONE SIDE OF WORKSPACE AND NO LIVEGROUNDED PARTS ONTHE OTHER SIDE.EXPOSED LIVE PARTSON ONE SIDE OF WORKSPACE AND LIVEGROUNDED PARTS ONTHE OTHER SIDE.EXPOSED LIVE PARTSON ONE SIDE OF WORKSPACE AND EXPOSEDLIVE PARTS ON THEOTHER SIDE.30 in (760 mm)MINIMUM ORWIDTH OFENCLOSURE,WHICH EVER ISGREATER78 in (1980 mm)MINIMUM ORHEIGHT OFENCLOSURE,WHICH EVER ISGREATER36 in (915 mm) MINIMUM 42 in (1065 mm) MINIMUM 48 in (1220 mm) MINIMUMConcrete, brick or tile walls shall be considered as grounded.Qualified PersonA Qualified Person is one who, by possession of a recognized degree, certificate, or professional standing, orwho by extensive knowledge, training, and experience, has successfully demonstrated his/her ability to solve orresolve problems related to the subject matter, the work, or the project.Only qualified persons may work on electric circuit parts or equipment that have not been de-energized.Refer to U.S. Occupational Safety & Health Administration (OSHA) Regulations Standards - 29 CFR 1926.32(m)and 1910.333, or applicable national, state or local regulations for additional information.Irrigation Equipment near Airports and Crop Dusting Aircraft• If any part of the irrigation machine comes within 3200 ft (975 m) of an airport runway, especially the ap-proach (ends) of the runway, additional warning markers may be required. In the United States, CFR Title 14,Chapter I, Subchapter E, Part 77 – Safe, Efficient Use, and Preservation of the Navigable Airspace describeswhen marking is needed.This document is available at: www.ecfr.gov• Marking requirements vary depending on the location of the irrigation equipment relative to the runway, thetype of airport (Civil, Military, or Heliport) and other factors. Contact the local airport authority for guidanceand specific recommendations. In the United States, guidelines for marking structures near airports arepublished by the Federal Aviation Administration in Advisory Circular AC 70/7460-1L – Obstruction Markingand Lighting.Available here: www.faa.gov/regulations_policies/advisory_circulars• For irrigation machines near private or unregulated airfields, including farm-based airstrips, Valley stronglyrecommends complying with the same standards and requirements as Civil airports as shown in Part 77.• Regulations vary by country, contact your local aviation authority for guidance.Overhang cables, including overhang back cables are a particular danger. In locations where low-flyingaircraft are likely, such as within 1,500 ft (457 m) of an end of an airport runway, or where crop dusting aircraftare common, Valley recommends adding obstruction markers to overhang cables to improve their visibility.For large overhangs (36 ft / 10.97 m Heavy Duty and longer), five 12 in (300 mm) or 20 in (500 mm), aviationorange marker balls are sufficient. One near the rabbit ears, two in the middle of the back cables and two inthe middle of the highest overhang cables. Refer to Section 3.5 in AC70/7460-1 for additional details. Aviationmarker balls are available online and from a variety of aviation and airport safety equipment providers. |
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