according to 680-40 for outdoor spas it sends you to 680 parts A and B. 680-12 states that a disconnecting means shall be provided and accessible within sight of all pools, spas, and hot tubs and shall be at least 5 feet from the wall. As for the gfi requirement, in my area a gfci breaker is required but I cant find the article. I dont know if this is a local thing or in the nec. hope this helps.
