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I just purchased a new hot tub. During the purchase process, I visited four different dealers and discussed probably a dozen different tubs. At no time did any of the salesmen even metion wiring requirements. Luckily, I've owned 4 tubs previously and knew what to expect. I did my own research on-line and never even bothered to bring the subject up. A new 70 foot long 240VAC 50 amp circuit doesn't come cheap. (75' of 6-3 with ground UF wire, a 50amp/240VAC breaker, a 50amp/240VAC GFI, misc. hardware and 4+ hours of installation time). It can be a rude awakening.