AS NZS 60335.2.60:2018 pdf free.Household and similar electrical appliances- Safety Part 2.60: Particular requirements for whirlpool baths and whirlpool spas.
22.102 Whirlpool baths shall be constructed so that the quantity of water that remains in the appliance after emptying the bath, and is recirculated the next time the bath is used, shall not exceed 0,5 I or 0,2 % of the capacity of the bath, whichever is less.
The capacity of the whirlpool bath is considered to be the volume of water required to fill the bath until water starts to flow through the overflow outlet.
Compliance is checked by any suitable method, such as measurements using chemical dilution, weighing or determination of volume.
22.103 Whirlpool baths and whirlpool spas shall be constructed so that hair cannot be drawn into apertures due to water suction if this could result in a hazard.
Compliance is checked by the following test.
The appliance is filled as specified for normal operation.
A mass of 50 g of medium or fine natural human hair is attached to a wooden rod having a diameter of 25 mm, the free length of hair being 400 mm. The rod is to have sufficient length for the hair to reach the suction opening. The hair is saturated for at least 2 mm in the water.
The free end of the hair is placed over the suction opening and the appliance operated while supplied at rated voltage. The hair is moved from side to side for up to 2,5 mm in an attempt to get it sucked completely into the opening.
The rod is pulled in order to withdraw the hair from the water and the pull force is measured with
— the rod pulled vertically;
— the rod pulled at an angle of approximately 4QQ to the vertical.
The force shall not exceed 20 N.
If the whirlpool bath or whirlpool spa is provided with a detachable cover for the suction opening, the test is also carried out with the cover in place. During the test, the hair is used to sweep the cover in an attempt to displace it.AS NZS 60335.2.60 pdf download.