California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 5 - Electrical Safety Orders
Group 2 - High-Voltage Electrical Safety Orders
Article 8 - Cabinets, Boxes, and Fittings
Section 2753 - Construction and Installation Requirements

(a) Pull boxes shall be made of material inherently resistant to corrosion or shall be suitably protected, both internally and externally, by enameling, galvanizing, plating, or other equivalent means.

(b) Suitable bushings, shields, or fittings having smooth rounded edges shall be provided where conductors pass through partitions and at other locations where necessary.

(c) Boxes shall provide a complete enclosure for the contained conductors or cables.

(d) Pull boxes shall be so installed that the wiring is accessible without removing any part of the building. Working space shall be provided in accordance with Article 35.

(e) Pull boxes shall be of a type approved for the respective location in which they are installed.

(f) Boxes shall be effectively closed by suitable covers secured against unauthorized entry. Underground box covers that weigh over 100 pounds (45.4 kg) shall be considered secured against unauthorized entry.

(g) Pull boxes and their covers shall be able to withstand the loading to which they may be subjected.

(h) Pull boxes shall be securely fastened or set in place.

(i) Covers for boxes shall be labeled "HIGH VOLTAGE." The label shall be on the outside of the box cover and readily visible. Letter shall be block letters at least 1/2 inch in height.

(j) For grounding, see Article 6.