30 CFR 77.509
§ 77.509 Transformers; installation and guarding.
United States · 30 CFR — Mineral Resources · Status: effective
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- Citation
- 30 CFR 77.509, § 77.509 Transformers; installation and guarding, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/134052
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Full text
(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.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.