According to: http://www.onlineconversion.com
,12 ton of refrigeration = 56.5713594 horsepower [electric]
The conversion factor is 1 ton = 4.714 HP
However, if you are sizing feeders, etc., you need to go by the nameplate data on the motors, or other manufacturer's data.
[This message has been edited by NJwirenut (edited 04-26-2005).]