Hi everyone, first post here and looking for some help. I just bought a used spa that the previous owner had wired for 120v. It looks like going to 240v is a simple matter of using 240v supply.

As you can see from the picture, the cover for the electrical connections has 2 boxes printed on the outside: one says 240v-4 wires (N, L1, L2, G); second one says 120v-3 wires (N/L1,G). I have taken the cover of the controls off and see nothing that leads me to believe more needs to be done. Is it possible to be wired internally that just adding the second live wire will work? I have another picture of the internals is that helps...JDanW

Thanks for reading and helping...JDanW