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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 1238 December 2, 2005 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Proposed Fourth Edition of UL 1238 a) Editorial changes to clarify requirements, update references, and the addition of new gloss
2、ary terms; b) Addition of new test requirements for secondary circuits, tests for motors, abnormal conditions of control equipment, fl exing test, absorption of moisture grounding circuit resistance, internal enclosure push test, component push test, knockout test, and leakage current test; c) New m
3、arking and instruction requirements; and d) New Annex A (Electrochemical Potentials), Annex B (Flammability Tests), and Annex C (Leakage Current Test Instrument). STP BALLOTS DUE: JANUARY 16, 2006 COMMENTS DUE: JANUARY 16, 2006 For your convenience in review, proposed additions to existing requireme
4、nts are shown underlined and proposed deletions are shown lined-out. 1. Proposed Fourth Edition of UL 1238 RATIONALE The attached table shows the new paragraph reference, old paragraph reference, and a brief description of the proposed changes and rationale behind the change. Description of Changes
5、to Proposed Fourth Edition of UL 1238 New ReferenceOld ReferenceDescription of proposed changes/Rationale 1.11.1Scope expanded to cover monitoring for leak detection. Leak detection devices are covered under this standard and this revision adds these types of devices to the scope. 1.21.2The standard
6、s referenced are covered under Appendix A, and were removed from 1.2. 1.3New paragraph 1.3 was added to make reference to Appendix A and the standards needed for investigations. Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Gear
7、hard, Marcus Not for Resale, 06/01/2007 01:28:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Description of Changes to Proposed Fourth Edition of UL 1238 Continued New ReferenceOld ReferenceDescription of pro
8、posed changes/Rationale 1.41.3In line with the scope change to paragraph 1.1, items (e) and (f) covering leak detection equipment and vapor recovery equipment were added to clarify the equipment covered by this standard. 1.51.4No changes 1.61.6No changes 2.1.1 2.1.42.1.1 2.1.4No changes 2.1.52.1.5Th
9、e term portable was changed to movable to be more in line with the defi nitions in the standard. 2.2.1, 2.2.22.2.1, 2.2.2No changes 2.3.1This new paragraph was added to indicate that the most recent edition of a standard or code should be used when no date is given as reference. This is standardized
10、 wording used in UL Standards. 3.13.1The paragraph was revised to provide an explanation of the defi nitions in the glossary. 3.23.2 Changed the word defi nitions to abbreviations for clarity. 3.33.3The wording in the paragraph changed from beyond to that falls between for clarity. 3.43.4Wording was
11、 revised to clarify the types of circuits seen in these products. 3.5 New defi nition added for Class 2 Transformer. This term was used in the previous edition of the standard but was never defi ned. 3.63.5No changes 3.71.5 The defi nition for the term Device was previously in paragraph 1.5, but has
12、 been moved to 3.7 for clarity. 3.8 New defi nition added for enclosures and the different types of enclosures that will be required by the standard. These enclosure types were not defi ned previously, although many of the requirements were in place. 3.9 New glossary term and defi nition for Fluid C
13、onfi ning Part has been added. This term was used previously in the standard but was never defi ned. 3.103.6No changes 3.11 New glossary term and defi nition of Hazardous Locations has been added. The concept of classifi ed areas was always addressed in accordance with the National Electrical Code.
14、This defi nition was not included in the standard, and has been added for explanation of what the term covers. 3.12 New glossary term and defi nition for Insulation Classes has been added. This is a new concept and was not defi ned previously. 3.13 New glossary term and defi nition for Isolation has
15、 been added. This term was used previously in the standard, but was never defi ned. 3.14 New glossary term and defi nition for Pollution Degree has been added. This term was used previously in the standard, but was never defi ned. 4.1, 4.2These paragraphs were deleted as other paragraphs within this
16、 section cover this requirement, which render these requirements obsolete. 4.1.15.1.1No changes DECEMBER 2, 2005SUBJECT 1238-2- Description of Changes to Proposed Fourth Edition of UL 1238 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=I
17、HS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 01:28:39 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Description of Changes to Proposed Fourth Edition of UL 1238 Continued New Refere
18、nceOld ReferenceDescription of proposed changes/Rationale 5.1.2, 5.1.3These paragraphs have been deleted. The wording has been changed and readdressed as enclosure and fl ammability requirements in subsequent paragraphs. 4.1.25.1.4No changes 4.2.1.1 New paragraph added specifying that a fi re enclos
19、ure shall prevent molten metal, burning insulation, fl aming particles, or similar materials from falling on combustible materials outside the fi re enclosure. 4.2.1.2 New paragraph has been added stating that a fi re enclosure is required to cover all parts. 4.2.1.3New paragraph provides a referenc
20、e to 4.5 for opening requirements within a fi re enclosure. 4.2.2.1New paragraph added stating that an electrical enclosure shall prevent the operator from contacting hazardous circuits. 4.2.2.2New paragraph provides a reference to 4.5 for opening requirements within an electrical enclosure. 4.2.3.1
21、New paragraph stating that a mechanical enclosure shall prevent access to any hazardous moving part. 4.2.3.2New paragraph provides a reference to 4.5 for opening requirements within a mechanical enclosure. 4.3.15.2.1No changes 4.3.25.2.2, 5.2.3The requirements in 5.2.2 and 5.2.3 have been combined a
22、s paragraph 4.3.2. 4.3.35.2.4Wording of the paragraph revised to exclude access to live parts at hazardous voltage by specifying contact with wiring at hazardous voltages only. The tests outlined in a previous edition were then subsequently moved from this section to Section 35. 4.3.45.2.5No changes
23、 4.3.55.2.6This paragraph was revised to add the requirement for an interlock on covers that the user is instructed to open and behind which a hazard exists. As such, the hazard shall be removed by the use of an interlock switch that will shut down the power to the area accessed by the user or to th
24、e entire product. 4.3.6, 4.3.7, 4.3.85.2.7, 5.2.8, 5.2.9No changes 4.4The new title was added to introduce material requirements. Subsequently, all material requirements were grouped together under this title rather than being separate sections within the standard. 4.4.1.1, 4.4.1.25.3.1The wording f
25、or this paragraph was taken from paragraph 5.3.1 in the previous edition. The paragraph was broken into two paragraphs (4.4.1.1 and 4.4.1.2) for clarity. 4.4.2.1, 4.4.2.2, 4.4.2.35.4.1The wording for these paragraphs were taken from paragraph 5.4.1 in the previous edition. The paragraph has been bro
26、ken into three paragraphs (4.4.2.1, 4.4.2.2 and 4.4.2.3) for clarity. 4.4.3.1, 4.4.3.25.5.1, 5.5.2No changes 5.5.3 This has been deleted as it specifi ed the same requirement as 4.1.2. Table 4.1Table 5.1No changes Table 4.2Table 5.2No changes DECEMBER 2, 2005SUBJECT 1238-3- Description of Changes to
27、 Proposed Fourth Edition of UL 1238 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 01:28:39 MDTNo reproduction or networking permitted without license from IHS -,
28、-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Description of Changes to Proposed Fourth Edition of UL 1238 Continued New ReferenceOld ReferenceDescription of proposed changes/Rationale 4.4.4.1, 4.4.4.25.6.1The wording for these paragraphs were taken from paragraph 5.6.1 in the pr
29、evious edition. The paragraph has been broken into two paragraphs (4.4.4.1 and 4.4.4.2) for clarity. The test method for the glass impact test was moved from these paragraphs to Section 36. 5.7.1This paragraph was removed in this form and replaced with the individual requirements outlined in 4.2 for
30、 the three different types of enclosures. 4.5.1.15.8.1No changes 4.5.1.2 New paragraph specifi es the top opening requirements for fi re enclosures. Figure 4.1 New fi gure has been added giving examples of louver design. This fi gure is added to correspond to the new wording. 4.5.1.3 New paragraph s
31、pecifi es the side opening requirements for fi re enclosures. Figure 4.2 New Figure giving examples of side openings. This fi gure has been added to correspond to the new wording. Figure 4.3 New fi gure gives examples of bottom openings. This fi gure has been added to correspond to the new wording.
32、4.5.1.4 New paragraph specifi es the bottom opening requirements of a fi re enclosure. Figure 4.4 New fi gure gives examples of baffle plates. This fi gure is added to correspond to the new wording. 4.5.1.5, 4.5.1.6, 4.5.1.7, 4.5.1.8, 4.5.1.9, 4.5.1.10 These paragraphs were added to cover accessibil
33、ity of uninsulated live parts, fi lm coated wire, or moving parts through an opening in electrical and mechanical enclosures. Figures 4.5, 4.6, 4.7, 4.8 New fi gures added in conjunction with new paragraphs specifying requirements for accessibility. Table 4.3This table was added in conjunction with
34、paragraph 4.5.1.5. 4.5.2.1, 4.5.2.25.10.1, 5.10.2No changes 4.5.2.35.10.3Tests moved to Section 37 and reference to Section 37 added. 5.10.6The intent of 5.10.6 is addressed in 37.1.2. Paragraph 37.1.2 is a new paragraph as indicated in the proposed new edition, however, one sentence of the new para
35、graph captures the intent of the old paragraph 5.10.6. 4.5.2.45.10.7No changes 4.5.2.55.10.8The wording of this paragraph has been revised to clarify the requirement and a reference to a new test (Knockout Test, Section 47) was added. 4.5.2.65.10.9Wording has been revised to clarify the intent of th
36、is requirement. Table 4.4Added table for surrounding surface area requirements. Table added in conjunction with 4.5.2.6 rewording. 4.5.2.7, 4.5.2.85.10.10, 5.10.11No changes 5.10.12Paragraph has been deleted since other requirements cover this concept and this wording was also misleading. Table 4.5T
37、able 5.3No changes 4.5.3.1, 4.5.3.2, 4.5.3.35.9.1, 5.9.2, 5.9.3No changes Figure 4.9Figure 5.1No changes 4.5.3.45.9.4The wording has been revised to clarify the requirement. 4.6.16.1The wording for paragraph 6.1 was split between 4.6.1 and 4.6.3. A reference to the Rain Test, Section 38 was added. D
38、ECEMBER 2, 2005SUBJECT 1238-4- Description of Changes to Proposed Fourth Edition of UL 1238 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 01:28:39 MDTNo reproduc
39、tion or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Description of Changes to Proposed Fourth Edition of UL 1238 Continued New ReferenceOld ReferenceDescription of proposed changes/Rationale 4.6.26.2The wording of this paragraph h
40、as not changed, but the reference to 4.6.1 will reference the Rain Test, Section 38. 4.6.36.1The remaining wording from paragraph 6.1 was added in here as a new paragraph 4.6.3. A reference to Annex A for metal combinations that could result in galvanic corrosion was added. 4.6.46.3Wording changed t
41、o remove original wording in regard to test method and provide a reference to Section 38 for the test method for the Rain Test. 4.6.56.4No changes 4.6.66.5The wording of the paragraph was revised to reference Gaskets, Section 30. This reference is to the original aging test, but also references to n
42、ew tests: Low Temperature Test and Adhesion Test. 4.6.7, 4.6.86.6, 6.7No changes 5.1.1 New paragraph covering metallic fi re enclosures and the fact that they are considered to comply without test. Reference is made to magnesium materials which are to be considered for fl ammability the same as a pl
43、astic material. 5.1.2This new paragraph covers the requirements for nonmetallic fi re enclosures. The clause makes reference to the overall mass of the unit and specifi es either a V-1 rating (for products less than 18 kg) or a 5V rating (for products greater than 18 kg). 5.2.1This new paragraph cov
44、ers the requirements for all plastic materials and makes reference to the fl ammability requirements in new Annex B. All plastic materials that are not covered by specifi c requirements shall be rated V-2 or HF-2. If the materials are not Recognized, they shall be tested for fl ammability in accorda
45、nce with Annex B. 5.2.2 This new paragraph covers the specifi c requirements for printed wiring boards. Printed wiring boards shall be rated V-1 minimum. The intent of this requirement covers the spacings in secondary circuits and ground. If the printed wiring board is rated V-1 minimum, we do not n
46、eed to address secondary spacings or secondary dielectrics. 5.2.3This new paragraph covers components that are exempt from fl ammability requirements. 5.2.4 This new paragraph covers the requirements for air fi lter assemblies and the fl ammability of the foam material of the air fi lter. 5.3.1 This
47、 new paragraph specifi es that all plastic parts used outside of the fi re enclosure shall be rated HB minimum. 6.17.1No changes 6.27.2The wording of this paragraph has been revised to clarify the requirements. In addition, reference to a marking or operating instruction was added to describe the le
48、vel of hazard to the user. 6.37.3No changes 7.1, 7.2, 7.3These new paragraphs cover requirements in regard to intercom systems installed as part of the dispenser outdoors. 8.1 8.49.1 9.4No changes 8.5This new paragraph covers the requirements for interlock switches and when they are required. DECEMB
49、ER 2, 2005SUBJECT 1238-5- Description of Changes to Proposed Fourth Edition of UL 1238 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Gearhard, Marcus Not for Resale, 06/01/2007 01:28:39 MDTNo reproduction or networking permitted without license from IHS -,