AS NZS-3136 pdf download – Approval and test specification – Electrical equipment for spa and swimming pools

AS NZS-3136 pdf download – Approval and test specification – Electrical equipment for spa and swimming pools
5.3 Connection to fixed wiring The equipment shall be provided with facilities for the connection of the supply conductors in accordance with the relevant requirements of Clauses 4.3 and 4.9 of AS/NZS 31 00. 6 ENCLOSURES All enclosures shall comply with the requirements of Clause 4.1 0 of AS/NZS 31 00 and shall prevent contact with internal moving parts and live parts. Equipment requiring protection against ingress of moisture due to weather and splashing shall be of the appropriate degree of protection, or be provided with an additional enclosure complying with AS 60529 as follows:
A2 (a) IPX3 if installed outside the pool zone.
(b) IPX4 if installed in the pool zone.
(c) IPX8 if intended for submersion.
7 EARTHING Where equipment is not provided with double insulation (see Clause 8), it shall comply with Clause 5.3 of AS/NZS 31 00 and the earthing terminal shall be marked in accordance with Clause
7.4 of AS/NZS 31 00. The metal sheath of any heating element shall be regarded as exposed metal where the sheath or any conductive material or liquid in contact with it can be touched by the standard test finger during normal use. The equipment shall pass the earthing test prescribed in Table 1 . 8 DOUBLE INSULATION Equipment provided with double insulation shall comply with the relevant requirements of Clause 5.4 of AS/NZS 31 00. Any openings in the external housing and body of double-insulated equipment shall be designed, located or protected by a labyrinth or baffles to
(a) prevent the entry of extraneous objects, particles, foreign matter or moisture which can be reasonably anticipated and the accumulation of which may bridge either basic or supplementary insulation; and
(b) prevent live parts or basic insulation from being touched by the test pin shown in Figure 1 . For equipment with a non-earthed water circuit, double insulation between the water circuit and live parts shall be provided. Additionally, probes and similar devices in contact with the water circuit shall be provided with double insulation between the water circuit and live parts. 9 EQUIPMENT WIRING Equipment wiring shall comply with the relevant requirements of Clause 5.2 of AS/NZS 31 00. Equipment wiring shall be located or protected so as to be adequately safeguarded against mechanical damage and spillage. Equipment wiring shall be arranged so that insulation, which is relied upon to prevent short-circuit or contact with material through which electrical leakage may occur, will not be exposed to temperatures in excess of those permitted for the type of insulation used, or be subjected to damage by relative movement between component parts.
1 0 CAPACITORS Any capacitor mounted externally to its equipment shall be provided with protection against mechanical damage and the emission of molten metal, resulting from failure of the capacitor. This protection shall be inherent to the capacitor housing or be provided by an additional enclosure.
1 1 INSULATING MATERIAL
1 1 .1 Terminal blocks and essential insulating material Terminal blocks and any essential insulating material shall be located or protected so as to ensure that the safety of the equipment is not impaired by any condition likely to be encountered under both normal and abnormal operating conditions and shall comply with the tests of Clause 1 9.9.
1 2 MOTORS
1 2.1 General All unattended motor-operated equipment shall be provided with either inherent or non-inherent thermal protection and shall comply with Clauses 1 9.4 and 1 9.8.
1 2.2 Motor protective devices Where a protective device is of the automatic reset type, the resetting of the protective device shall not lead to any risk of injury.
1 3 HEATING UNITS THAT ARE IMMERSED
1 3.1 General Each element of the heating unit shall be completely enclosed in a metal sheathing of such material and form as will ensure that, under normal operating conditions, liquid in which it is immersed shall not come into contact with the element or live parts. Each element shall be located centrally within the sheathing in such a manner as to prevent relative movement or contact between the element and the sheathing. Loose filling without spacers shall be insufficient protection against contact between the element and the casing. A spacer, bushing or filling shall be provided at the point of exit of the elements from the sheathing. The sheathing shall be made from a corrosion-resistant alloy or, alternatively, be plated or otherwise treated in a manner which will prevent undue corrosion under normal conditions of use. The unit shall be provided with a temperature regulating control such that the water temperature cannot exceed 45 °C under normal operation. NOTE: Medical authorities recommend that the average temperature of spa-pool water should not exceed 40 °C owing to the possibility of hyperthermia (heat stress).