Guy's,
I have a 2 and 4 post hoist ( TUFFLIFT ) both 15AMP power.
The garage was wired with 10/15/20amp outlets for different devices.
The hoists are 15amp ( but can be modified for 10amp plugs ) and the
amount of time they are used the 20 second lift time is irrelevant.
Think back to when you had to lift the car with a jack and only to knee
height.
The 2 post hoist is the best tool I have ever purchased......
STIFFY