Just purchased home and in basement found two on/off controls sitting on a counter & in its place are two very thick wires running to a board w/six 220 volt plugs, I can do regular 110 volt switch's/plugs no problem but this has 4 wires, 2 red, 2 black.....I can see other wires hooked up, but they are black & white, and I have no idea where red wires are connected to, any help greatly appreciated!

Ran into a problem and I'm stumped. I replaced a hot tub that requires a 50A GFI. I trimmed the existing wires a bit to have a better contact. When I tried to flip the breaker on it automatically trips. I went out and hit the external disconnect to cut power to the spa and it stayed on. I continued downstream from the disconnect and removed the supply wires at the control pack lugs. I closed the disconnect and hit the breaker, it stayed closed. I reconnect the spa and it tripped. It's a new spa and I am reluctant to think it's actually the spa. Here's where it gets weird, to test the GFI breaker I removed the lines to the spa and replaced them with the lines to my dryer and it still tripped so I replaced it with a new one. I tried the spa with a regular 50A and it was fine. I returned the lines to the GFI and it's still tripping. I can't figure out which direction to look. I even went systematically through my panel flipping each breaker then testing the GFI to see if there might be some faulty circuit sending current through the neutral, nothing. I am at a loss. Anyone have any suggestions where I can look to troubleshoot? Thanks for any ideas. Steve