Underground systems
Scope:
Overview
The Canadian Electrical Code is published in several parts, with Part III standards covering electrical protection, safety, and design criteria related to both overhead and underground systems for distribution and transmission. ‘Underground Systems’ refers to the lines and equipment associated with underground electrical supply and communications systems located entirely outside buildings and fenced supply stations. The fifth edition of CSA C22.3 No. 7 Underground Systems is one of a series of standards issued under the Canadian Electrical Code, Part III.
Highlights of C22.3 No.7
Updated reference publications, revised definitions and restructured clauses
Removal of backfill compaction values and layering requirements
Updated requirements for bonding of supply and communication cable shields/sheaths
Addition of new clauses including depth below grade of grounding conductors, separation between grounding conductors and gas lines, and marking for supply cables installed at a reduced depth of burial
Addition of material to Annex A dealing with line of sight intersections and supply cable bonding techniques
Project need:
Note: The information provided above was obtained by the Standards Council of Canada (SCC) and is provided as part of a centralized, transparent notification system for new standards development. The system allows SCC-accredited Standards Development Organizations (SDOs), and members of the public, to be informed of new work in Canadian standards development, and allows SCC-accredited SDOs to identify and resolve potential duplication of standards and effort.
Individual SDOs are responsible for the content and accuracy of the information presented here. The text is presented in the language in which it was provided to SCC.