I am a little confused on sizing for wires rated 100A or less. I think that you have to use the 60 deg. C tables for allowable ampacities since all terminals under 100A are rated at 60 deg. C (lowest rating of splice or term). Then demand factors/correction etc is applied to this (125% of motor loads etc?) Can someone explain this to me since it seems a little confusing. Also if you use table 310-15(b)(6) for dwellings can you use these straight across the board (say at 80% of calculated load?)

Thanks for the help

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