30 CFR §57.12067

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗

Transformers shall be totally enclosed, 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.