Subjgrp 186. Underground Only
- § 57.12080 - Bare conductor guards.
- § 57.12081 - Bonding metal pipelines to ground return circuits.
- § 57.12082 - Isolation of powerlines.
- § 57.12083 - Support of power cables in shafts and boreholes.
- § 57.12084 - Branch circuit disconnecting devices.
- § 57.12085 - Transformer stations.
- § 57.12086 - Location of trolley wire.
- § 57.12088 - Splicing trailing cables.