scope:

These requirements cover indoor hydromassage bathtubs, rated 250 volts or less, for household and commercial use, for permanent connection to the plumbing of the building. They are intended for either permanent connection to the electrical supply or are factory-provided with a cord terminating in an attachment plug, and are intended for installation and use in accordance with the National Electrical Code, NFPA 70.

These requirements do not cover portable cord-connected hydromassage equipment, which is covered by the Standard for Personal Hygiene and Health Care Appliances, UL 1431, or hydrotherapy tubs, which are covered by the Standard for Medical and Dental Equipment, UL 544.

The majority of the requirements in this Standard address complete hydromassage bathtubs, including field-installed accessories. The following sections specify requirements for field-installed accessory heaters evaluated and certified for the hydromassage bathtub manufacturer.

a) Hydromassage Bathtubs Configured for Field-Installed Heaters, (CONSTRUCTION) Section 25, and

b) Field-Installed Heaters, Section 26.

c) Test for Field-Installed Heaters, (PERFORMANCE) Section 62.

d) Hydromassage Bathtubs Configured for Field-Installed Heaters, (MARKINGS) Section 68, and

e) Field-Installed Heaters, Section 69.