Terence McCann Posted September 29, 2006 Report Share Posted September 29, 2006 In older homes that have 60 AMP service and have had air conditioning installed I always recommend upgrading the service 100 Amp minimum. Also, all the years that I was in the trade it was always a given however, does anyone have documentation substantiating this? Link to comment Share on other sites More sharing options...
Bain Posted September 30, 2006 Report Share Posted September 30, 2006 I doubt you'll find anything in writing. I was always told a 60-amp service could sustain two 240-volt appliances and that a 100-amp service could sustain three. I used to tell people they would have to use a gas range if they wanted A/C and a clothes dryer connected to a 60-amp service. Link to comment Share on other sites More sharing options...
Jim Katen Posted September 30, 2006 Report Share Posted September 30, 2006 Originally posted by Terence McCann In older homes that have 60 AMP service and have had air conditioning installed I always recommend upgrading the service 100 Amp minimum. Also, all the years that I was in the trade it was always a given however, does anyone have documentation substantiating this? I never thought about it in those terms. If I have any doubt, I do a quick load calc. It's pretty easy. You'll find a good one in the back of code check electrical. - Jim Katen, Oregon Link to comment Share on other sites More sharing options...
BADAIR Posted October 1, 2006 Report Share Posted October 1, 2006 http://www.codecheck.com/images/CCWet02big.jpg http://www.codecheck.com/pg00cover.htm Link to comment Share on other sites More sharing options...
Terence McCann Posted October 1, 2006 Author Report Share Posted October 1, 2006 Maybe I'll check with a few of the local municipalities. Perhaps when pulling permits they wanted to see the service upgraded to 100 AMP. Wish I could remember where I heard that. Out of all the things I lost I miss my mind the most. Link to comment Share on other sites More sharing options...
Terence McCann Posted October 5, 2006 Author Report Share Posted October 5, 2006 Getting back to this for one more question. How many do a load calc when needed? Link to comment Share on other sites More sharing options...
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