ECN Forum Forums Code Related Discussion Canadian Electrical Code Topics 100AMP panel in 60 degree ambient what size wire?

Method 1? Are you saying that all commercial 100 amp panels, in Victoria, (excluding derating for temperature) are fed with #1 awg?

When you determine the panel size, it might be based on 125% of the load, but the wire size isn't again increased. That would be applying the 125% rule twice. Once for the minimum circuit ampacity and a second time to the conductor.