AS NZS 3117:2015 pdf free download

AS NZS 3117:2015 pdf free download
AS NZS 3117:2015 pdf free download.Approval and test specification— Bayonet lampholders
19.2 Resistance to tracking
For IPX1 drip-proof lampholders, insulating parts retaining live parts or ELV parts in position shall have adequate resistance to tracking.
For materials other than ceramic, compliance shall be checked by the proof tracking test of IEC 60112, subject to the following:
(a) If the specimen has no flat surface of at least 15 mm × 15 mm, the test may be carried out on a flat surface with reduced dimensions provided drops of liquid do not flow off the specimen during the test.
NOTE: No artificial means should, however, be used to retain the liquid on the surface. In case of doubt, the test may be made on a separate strip of the same material, having the required dimensions and manufactured by the same process.
(b) The test shall be made at three places on the specimen or on three specimens.
NOTE: If the thickness of the specimen is less than 3 mm, two or, if necessary, more specimens should be stacked to obtain a thickness of at least 3 mm.
(c) The electrodes shall be of platinum and test solution A, as described in Clause 7 of IEC 60112:2003, shall be used.
(d) For IPX1 drip-proof lampholders, the specimen shall withstand 50 drops without failure at a test voltage of proof tracking index (PTI) 175.
(e) A failure has occurred if a current of 0.5 A or more flows for at least 2 s in a conducting path between the electrodes on the surface of the specimen, thus operating the overcurrent relay, or if the specimen burns without releasing the overcurrent relay.
(f) Clause 9 of IEC 60112:2003, on determination of erosion, does not apply.
NOTE: Note 1 to Clause 5 of IEC 60112:2003, regarding surface treatment, does not apply.
Contacts are incorporated on the maximum size gauges to ensure that the contacts of lampholders will permit the safe and effective insertion and operation of lamps with contacts of the maximum permissible dimensions.