《UL-510-BULLETINS-2005.pdf》由会员分享，可在线阅读，更多相关《UL-510-BULLETINS-2005.pdf（6页珍藏版）》请在三一文库上搜索。
1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 510 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Revision to Clarify the Use of Unconditioned Samples for Physical Properties, Dielectric, and Adhesion-Strength Tests 2. Removal of Reference to Me
2、thod A of ASTM D1000 3. Revision to Clarify the Method for Conducting the Deformation Test 4. ChangeWeather ResistantMarking toSunlight ResistantMarking 5. Miscellaneous Revisions For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions
3、are shown lined-out. 1. REVISION TO CLARIFY THE USE OF UNCONDITIONED SAMPLES FOR PHYSICAL PROPERTIES, DIELECTRIC, AND ADHESION-STRENGTH TESTS RATIONALE UL proposes that paragraphs 9.1, 10.1, and 11.1 (see Topic 2) be revised to refl ect current practice and to clarify the use of unconditioned sample
4、s for the Physical Properties, Dielectric, and Adhesion- Strength Tests. PROPOSAL 9.1 The physical properties of a thermoplastic insulating tape shall be such that, when fi ve unconditioned specimens are tested for breaking strength and elongation in accordance with the Standard Test Methods for Pre
5、ssure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications, ASTM D 1000, the average performance is in accordance with Table 9.1. 10.1 The average unconditioned dielectric strength of fi ve specimens of fi nished PVC or PE tape shall not be less than 1000 volts per mil (39
6、.37 kilovolts per millimeter) of the tape thickness (backing plus adhesive) when tested in accordance with the short-time method described in the Standard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications, ASTM D 1000. Copyright Underwriters La
7、boratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130 Not for Resale, 08/30/2006 05:14:30 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 2. REMOVAL OF REFERENCE TO METHO
8、D A OF ASTM D1000 RATIONALE There is no Method A in ASTM D1000 for the adhesive test. UL proposes that paragraph 11.1 be revised to remove reference to Method A of ASTM D1000 as well as to clarify the use of unconditioned samples for the adhesion-strength tests (see Topic 1). PROPOSAL 11.1 An uncond
9、itioned thermoplastic insulating tape shall have a minimum average adhesion strength of 16 oz-f/in or 0.175 N/mm or 18 g-f/mm when applied to steel or and to the tape backing as determined by the test adhesion-strength tests and procedures outlined in Method A of the adhesion-strength tests of the S
10、tandard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications, ASTM D 1000. 3. REVISION TO CLARIFY THE METHOD FOR CONDUCTING THE DEFORMATION TEST RATIONALE UL proposes to revise paragraph 15.2 and to add paragraphs 15.3 and 15.4. Since dial microme
11、ters able to withstand the oven temperatures called out in the current deformation test are becoming very scarce, the proposal utilizes an already accepted (UL 224) method for conducting this test where the micrometer need not be conditioned. PROPOSAL 15.2 A bare 12 AWG solid copper conductor is to
12、be wrapped with successive layers of tape, with each layer of tape directly over the one below, until a thickness of tape equal to approximately 1/32 in (0.8 mm) is in place over the conductor. The thickness of the insulation (tape) is to be measured by means of a dead-weight dial micrometer having
13、no added weight and a presser foot 0.375 0.010 in (9.5 0.2 mm) in diameter. The specimen is then to be placed in the oven for 1 hour of preliminary heating at a temperature of 100.0 1.0C (212.0 1.8F) along with the dial micrometer and a weight to cause the foot of the micrometer to press on a specim
14、en placed between the foot and the anvil with 500 g-f (4.90 N). At the end of 1 hour, the specimen is to be placed under the foot of the dial micrometer with the weight added and then is to remain in the oven with the oven operating at full draft at a temperature of 100.0 1.0C (212.0 1.8F) for an ad
15、ditional hour. At the end of the second hour, the dial of the micrometer is to be read, without removing the specimen or the dial micrometer from the oven, and the percent decrease in the thickness of the insulation (tape) is to be calculated. 15.3 The apparatus for the determination of percentage d
16、eformation shall consist of: a) an oven capable of maintaining the required air temperature and having the characteristics required by ASTM D 5374; and b) the necessary weights needed to exert a total force of 500 g-f (4.90 N) mounted in a metal frame so as to have free vertical movement, as illustr
17、ated in Figure 15.1. The weight shall be provided with a 0.375 0.010 in (9.5 0.2 mm) diameter fl at presser foot, slightly rounded at the edges, and intended to bear upon the specimen under test. This is generated text for fi gtxt. SUBJECT 510-2- Copyright Underwriters Laboratories Inc. Provided by
18、IHS under license with ULLicensee=Army Northwestern Div./7838506130 Not for Resale, 08/30/2006 05:14:30 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Figure 15.1 Weights and specimens in supporting frame for de
19、formation test (See 15.3 and 15.4) SUBJECT 510-3- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130 Not for Resale, 08/30/2006 05:14:30 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR
20、CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 15.4 The specimen is to be placed in the oven for 1 hour of preliminary heating at a temperature of 100.0 1.0C (212.0 1.8F) along with the weights and supporting frame. At the end of 1 hour, the specimen is to be placed under the foot of one of the weights
21、for an additional hour. At the end of the second hour, the sample is carefully removed from under the weight and the thickness is remeasured within 15 seconds in the same manner as specifi ed in 15.2, and the percent decrease in the thickness of the insulation (tape) is to be calculated using the fo
22、llowing formula. D = (T1 T2) / (T1 C) X 100 in which: D is the percent decrease in thickness; T1is the overall sample diameter before aging; T2is the overall sample diameter after oven aging; and C is the conductor diameter. 4. CHANGE WEATHER RESISTANT MARKING TO SUNLIGHT RESISTANT MARKING RATIONALE
23、 The weatherability testing being conducted is primarily a UV evaluation and the term weather resistant infers more than just UV. Additionally, after a similar UV evaluation the wire which these tapes are wrapped around are rated sunlight resistant. Lastly the 2005 NEC was revised to indicate that f
24、or locations exposed to direct sunlight wire and cables are to be listed and marked sunlight resistant plus when covered with an insulating material such as tape or sleeving, the tape or sleeving is to be listed and marked sunlight resistant. Therefore, UL proposes that paragraphs 7.1, 14.1, 24.2, a
25、nd 24.3 be revised to change the weather resistant marking to sunlight resistant accordingly. PROPOSAL 7 Weatherability Sunlight Resistance Test 7.1 Insulating tape marked weather sunlight resistant in accordance with 24.2 shall retain at least 65 percent of its original average tensile strength and
26、 elongation after being conditioned for 100 hours. 14.1 A thermoplastic insulating tape marked cold and weather sunlight resistant in accordance with 24.3 shall not show any cracks, transfer of adhesive, or loss of tack in the adhesive to make the tape unfi t for insulating splices, after having bee
27、n subjected to a temperature of minus 10.0 2.0C (plus 14.0 3.6F) for 2 hours. 24.2 Insulating tape, the wrapper or carton containing a single roll of tape, or the central paper core may be marked: a) May be marked Flame retardant if the tape complies with the requirements in 6.1; b) May be marked We
28、ather Sunlight resistant if the tape complies with the requirements in 7.1; or SUBJECT 510-4- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130 Not for Resale, 08/30/2006 05:14:30 MDTNo reproduction or networking permitted withou
29、t license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION c) May be marked Flame retardant and weather sunlight resistant if the tape complies with the requirements in 6.1 and 7.1. 24.3 Thermoplastic insulating tape, the wrapper or carton containing a single roll of tape
30、, or the central paper core may be marked cold and weather sunlight resistant if the tape complies with the requirements in 7.1 and 14.1. The markings may be combined with those mentioned in 24.2. 5. MISCELLANEOUS REVISIONS RATIONALE UL proposes paragraph 6.7 be revised for clarity to include the wo
31、rd point. UL proposes to revise paragraph 14.2 due to an incorrect reference. PROPOSAL 6.7 A strip of unreinforced 60-lb (94-g/m2) kraft paper that is 1/2 in (13 mm) wide, approximately 5 mils (0.1 mm) thick, and is gummed on one side is to be used to make an indicator fl ag. The gumming is to be mo
32、istened but not more than necessary to facilitate adhesion. With the gum toward the specimen, the strip is to be wrapped around the specimen once with its lower edge 10 in (254 mm) above point B, the point at which the blue inner cone is to touch the specimen. The ends of the strip are to be pasted
33、together evenly and trimmed to provide a fl ag that projects 3/4 in (19 mm) from the specimen toward the rear of the enclosure with the fl ag parallel to the sides of the enclosure (see Figure 6.1). The lower clamp or other support for the specimen is to be adjusted vertically to keep it from being
34、any closer than 3 in (76 mm) to point B. 14.2 To determine whether a thermoplastic tape complies with the requirements in 14.1, two rolls of tape are to be maintained at a temperature of minus 10.0 2.0C (plus 14.0 3.6F) for 2 hours. At the end of 2 hours, and while still being maintained at minus 10
35、.0 2.0C (plus 14.0 3.6F), the tape from each roll is to be wrapped around a steel mandrel 1/8 in (3 mm) in diameter for a distance of 5 in (127 mm) using the method and apparatus mentioned in 6.2. In wrapping the tape, the advance of each turn is to equal half of the tape width. An additional length
36、 of tape taken from each roll is to be used to insulate a Western Union splice (see 13.4) while the wire and tape are at minus 10.0 2.0C (plus 14.0 3.6F), using a tension of 2-1/2 lbf or 11.1 N or 1.13 kgf as described in 6.2 13.5. The tape is not to crack during the operations and is to have adhesi
37、ve strength that results in a splice of good workmanship. The conductor is not to be affected adversely when examined after removal of the tape from the splices. Copyright 2005 Underwriters Laboratories Inc. SUBJECT 510-5- Copyright Underwriters Laboratories Inc. Provided by IHS under license with U
38、LLicensee=Army Northwestern Div./7838506130 Not for Resale, 08/30/2006 05:14:30 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION SUBJECT 510-6- No Text on This Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=Army Northwestern Div./7838506130 Not for Resale, 08/30/2006 05:14:30 MDTNo reproduction or networking permitted without license from IHS -,-,-