Product review (1 stars): customer support is clueless
nothing on their specs state the wire gauge.  Whirlpool website has nothing on wire gauge.  did the easy chat thing on technical support, chick says they have no information, told me to call distributor.  I said, if technical support at the factory doesn't know, how will your distributor know?  oh, she says, they handle all our service.  called dist while still on chat.  hold time only 3  minutes.  idiot kept reading me the same stuff "it's 4-wire, 4-prong".  No idea what wire gauge was.  tried a while with no success.  He tried to get me to buy water filters while I was on the phone.  back to chat to report the outcome.  she said "look!  I found out it's 4-wire, 4-prong.  Isn't that helpful?".  Utilitech says right in their header 6/2 and 8/2.  Looks like I'm going with them.