UL 1977:2002 pdf download – Component Connectors for Use in Data, Signal, Control and Power Applications
UL 1977:2002 pdf download – Component Connectors for Use in Data, Signal, Control and Power Applications.
10.1.1 A device shall be capable of being readily installed as intended.
10.1.2 A polarized device incorporating two or more contacts shall be keyed or of such design that the polarization can not be defeated by improper assembly during installahon.
10.1.3 Any two or more device parts that may be separated during installation shall not be capable of an assembly that will defeat the intended polarization of wiring.
10.2 Accessibility of live parts
10.2.1 A connector of Types 1A, 2, 3, or 4 intended for usage external lathe end equipment shall have live parts protected against exposure to contact by persons when assembled, installed and mated as intended, as determined by the use of the probe shown in Figure 10.1.
102.1 resed October 18. 2002
102.2 Mating devices of Types IA. 2, 3, or 4 intended for usage external to the end equipment shall not have exposed live contacts during engagement or withdrawal as determined by the use of the probe shown in Figure 10.1.
102.2 revised October l& 2002
10.3 Connection between mating devices
10,3.1 A hybrid device shall be polarized or olherwise constructed so that contacts with different Type designations cannot make electrical contact when mating devices are connected together.
10.3.2 A device provided with an identified grounding contact shall be so constructed that the grounding pin of the corresponding mating device when wired as intended, cannot be inserted into any other opening so as to touch a live contact or other live part.
10.3.3 An identified grounding contact provided on a device shall be located and formed so that the path of electrical continuity to the grounding contact of a mating device is completed before continuity is established between any other contact and its respective contact in the mating device,
Exception. A Type 0 or 18 devsce need not comply with this requirement.
13 Accelerated Aging Test
13.1 Rubber compounds
13.1.1 A molded-rubber attachment plug or cord connector shall not show any apparent deterioration and shall show no greater change in hardness than ten numbers as the result of exposure for 70 hours in a full-draft circulating-air oven at a temperature of 100.0 ±2.0°C (212.0 ±1.8°F).
131.1 revised Noverriber4, 1997
13.1.2 If possible, the complete device is to be tested. The hardness of the rubber is to be determined pnor to testing as the average of five readings with an appropriate gauge such as the Rex Hardness Gauge or the Shore Ourometer. The device is to be allowed to rest at room temperature for four or more hours after removal from the oven. The hardness is to be determined again as the average of five new readings. The difference between the average original hardness reading and the average reading taken after exposure to the heat conditioning is the change in hardness.
13.1.3 The accelerated-aging tests mentioned in 13.1,1 and 13.1.2 are to be made on each color of rubber and on each basic rubber compound employed for the device.
13.2 PVC compounds
13.21 A device having a body of molded plasticized polyvinyl chloride or a polyvinyl chloride copolymer thermoplastic etastomer shall not show any cracks, discoloration, or other visible signs of deterioration as the result of exposure for 96 hours in a full-draft circulating-air oven at a temperature of 100.0 ±1.0°C
Exception: A device having a body with a hardness of greater than Shore 065 as determined in accordance with ASTM 02240 need not be subierJed to this test.
14 Mold Stress Relief Test
14.1 As a result of temperature conditioning as specified in 14.2, there shalt not be any warpage, shrinkage or other distortion that results in any of the following:
a) Making uninsulated live parts, other than exposed wiring terminals or internal wiring, accessible to contact by the probe shown in Figure 10.1.