Hot tubs in St. Louis need electrical permits and must meet NEC 680 bonding and GFCI. A lockable ASTM F1346 safety cover exempts the spa from the 48-inch barrier. VGB drain covers are required.
Hot tubs and spas under St. Louis Building Code are regulated similarly to pools with one major exemption: a listed, locked safety cover meeting ASTM F1346 can substitute for the 48-inch barrier otherwise required. Electrical permit is required for the 240-volt circuit and disconnect; the unit must be on its own GFCI-protected circuit with the disconnect within sight but at least 5 feet from the tub water. Equipotential bonding per NEC 680.42 is required for all metal components within 5 feet. VGB drain covers apply. Setbacks follow the accessory-structure rules, typically 3 to 5 feet from property lines. Permanent installation integrated with decking may require a structural review.
Unpermitted electrical: red-tag by inspector. Missing or damaged cover without fence: fence installation ordered.
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