I am in the process of hooking up my spa panel. This is one of the last things I need to finally get up and running(I have only been working on this for a year and a half). I am planning on running 4 wires in conduit to my spa breaker from my main panel. I have the room in my basement and I'm pretty sure it will be cheaper than 6/4 wire. I know I need 6 gauge for my two hot leads but can I use smaller wire for my ground and neutral? I am using a power cord I bought for a range and it appears the neutral and ground are 8 gauge and the hots are 6. Thanks.