I've started thinking about bringing power into my year old barn which has been all DIY. I was planning on a 100 Amp sub panel with a main breaker to disconnect from the line coming over from the house. Now I'm considering possibly going to a 125 amp panel because there really isn't that much cost difference between buying a 100 amp or a 125 amp main breaker panel.
The question is will it be overkill. I will have in the barn, three or four lighting circuits, four or five 120V outlets, a 230v/30 line for the air compressor & possibly another 230v line for a heater & one dedicated 20 amp line for a Lincoln Mig 140 welder. I don't think the air compressor will ever be on at the same time as the heater, but even if they were I think I'm still ok. But in any case, is going to a 125 way over my needs. I highly doubt I will ever have more in this barn then what I have stated. I'm not so sure if more is better in my case. Any opinions? Thanks.