Adding to TopTech's response:
Quote:
If you're hooking it up to 220V then you need o install a seperate GFCI disconnect box close to the spa. If you are hooking it up to 110V then you can buy a power cord with a GFCI plug.
You MUST have a disconnecting means no closer than 5' from the closest INSIDE edge of the tub, and no further than 10', and within sight (eg. not obstructed by a wall). A disconnecting means can be either a switch, plug, or disconnect. You can have a GFI in this disconnect, or you can have the GFI in the main panel feeding this disconnect. If you are using a 120V tub, you can use a GFI outlet and standard plug, or as Toptech mentioned, a cord with a GFI on it.