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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 30 - Mineral Resources |
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Chapter I - Mine Safety and Health Administration, Department of Labor |
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SubChapter O - Coal Mine Safety and Health |
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Part 77 - Mandatory Safety Standards, Surface Coal Mines and Surface Work Areas of Underground Coal Mines |
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Subpart F - Electrical Equipment - General |
§ 77.509 - Transformers; installation and guarding.
Latest version.
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§ 77.509 Transformers; installation and guarding.
(a) Transformers shall be of the totally enclosed type, or shall be placed at least 8 feet above the ground, or installed in a transformer house, or surrounded by a substantial fence at least 6 feet high and at least 3 feet from any energized parts, casings, or wiring.
(b) Transformer stations shall be enclosed to prevent persons from unintentionally or inadvertently contacting energized parts.
(c) Transformer enclosures shall be kept locked against unauthorized entry.