Hate to start another thread after I started the one about powering up a cabinet saws vs hybrids. I'm far more of an accomplished carpenter and a year two electrician at best, so I have a few more things I'm just not getting. It was suggested that I create a 220v extension cord from 10/3 cable and power up a 3hp cabinet saw from the line that runs the dryer. I like this idea for the time frame I need it for. Here's my dilemma: the existing dryer line is a older style (pre 1996) which if I'm understanding correctly is dual voltage. One for the dryer motor and a higher rating for the drum. This is on a 30amp fuse. I have found a matching female end that I could put on a 10/3 cable to plug into this receptacle. It matches the 30 amp rating, same poles, but the specs say it has a max of 2 horsepower. The cabinet saw draws about 13 amps but is rated for 3 hp. I understand that volts x amps = watts and that 785 watts = 1 horsepower. I'm just not understanding why a plug that is capable of 30 amps is can only carry 2 hp?? Is there any safety reason why I can't buy a 30 amp female end, tie it to a 10/3 wire, put a standard 30 amp male end and run a 3 hp 220v 13 amp cabinet saw? Is the dual voltage setup of the old dryer style going to cause issues trying to run a single phase motor? I know a lot of electrical numbers from manufactures are 'puffed up' a bit, but some of them you have to pay attention to for safety sake particularly in this case that I'm dealing with a 220 line. If someone far more knowledgable could shine a little light on this for me I'd feel a lot better and safer knowing I have the right pieces in place. I've seen enough melted wires and fire damage for me to make damn sure I get it right.