ECN Forum Forums Code Related Discussion Canadian Electrical Code Topics Underground cable ampacity

Ares,

These tables were computed based on the IEEE 835.

To determine underground cable ampacities, refer to the IEEE Standard #835, "Standard Power Cable Ampacities".

If the installation is exactly as illustrated in Diagrams B4-1 to B4-4 of Appendix B, use Tables D8A - D11B and D13A - D16B of Appendix D.

Tony Moscioni
Electrical Inspector
Electrical Safety Authority