Skip to Main Content

This information is provided free of charge by the Department of Industrial Relations from its web site at These regulations are for the convenience of the user and no representation or warranty is made that the information is current or accurate. See full disclaimer at
Subchapter 5. Electrical Safety Orders
Group 2. High-Voltage Electrical Safety Orders
Article 27. Transformers (Formerly Article 76)
Return to index
New query

§2878. Grounding.

Transformer windings, if grounded, and metallic cases or enclosures for transformers shall be grounded in accordance with Article 6.

EXCEPTION: Cases of pole-mounted transformers need not be grounded, unless grounding is required by General Order No. 95, Rule 58.3C3, Rules for Overhead Electric Line Construction of the California Public Utilities Commission.

(Title 24, Part 3, Section 3-450-10.)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.


1. Editorial correction filed 11-2-83 (Register 83, No. 45).

2. Amendment filed 12-10-87; operative 1-9-88 (Register 88, No. 1).

Go BackGo Back to Article 27 Table of Contents