Hot tubs and non-swim spas in Sioux Falls fall under the 2021 ISPSC but benefit from a meaningful exception: under ISPSC § 305.6, a hot tub or spa equipped with a lockable safety cover that complies with ASTM F1346 is exempt from the perimeter barrier requirement that would otherwise apply to swimming pools. A building permit is still required for installation if the unit is hard-plumbed or hard-wired (most are), an electrical permit and inspection are required for the 240-volt circuit, and NEC Article 680 bonding still applies. A swim spa or active spa designed to allow swimming is NOT eligible for this exception and is regulated as a full swimming pool.
The hot-tub cover exception reflects industry consensus that locked rigid covers approved to ASTM F1346 (the standard for Safety Performance Specification for Safety Covers and Labeling Requirements for All Covers for Swimming Pools, Spas and Hot Tubs) provide barrier-equivalent protection. The lock must be operable only by an adult, and the cover must be fastened across the entire spa opening whenever the spa is not in use. NEC Article 680, Part IV, sets the electrical standard: a 50-ampere GFCI-protected disconnect must be at least 5 feet from the spa, with appropriate equipotential bonding of the spa shell and any metal within 5 feet. A typical residential plug-and-play 120-volt portable spa requires only a 20-amp dedicated GFCI receptacle but still requires a permit if the receptacle is being newly installed. Sioux Falls Planning & Development Services emphasizes that homeowners should keep the cover lock engaged whenever children may be present and that even a 'temporary' inflatable hot tub left filled overnight is subject to inspection if a complaint is received.
Leaving the cover unlocked or absent when the spa is unattended, especially in a home with children, can be cited as a public-safety violation if a complaint is filed. Hardwiring a spa without an electrical permit and inspection is a code violation. Reclassifying a swim spa as a hot tub to avoid barrier requirements is a misrepresentation that voids the permit and subjects the homeowner to permit-after-the-fact fees and required barrier installation.
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