According to the Canadian Electrical Code (CEC), the minimum depth of burial for NMWU (Non-Metallic Wire Underground) cable is generally as follows:

1. Under Non-Vehicular Areas: The minimum depth is 600 mm (approximately 24 inches).
2. Under Vehicular Areas (such as driveways): The minimum depth is 900 mm (approximately 36 inches).
3. If suitable mechanical protection is provided over the cable during burial, the minimum requirement can decrease to 150 mm.

These requirements are in place to ensure adequate protection for buried electrical wiring from potential damage. Always check local regulations or codes, as they may have additional requirements or modifications to the CEC.

For further details, you can refer to the Electrical Safety Authority's guidelines or consult your local electrical inspection office.

Sources

[PDF] #Buried Wiring Info Sheet - Electrical Safety AuthorityRunning electrical to shed. Direct burial or need conduit?minimum depth of burried low voltage and high voltage canada[PDF] Homeowners electrical wiring guide - The City of Calgary[PDF] Ontario Electrical Safety Code - Info Sheet[Canada] Direct burial depth of NMWU without a conduit? - RedditBurial Depths - electrical calc pro - SNAPPY APPZ

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