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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 496 January 19, 2007 SUMMARY OF TOPICS The following changes in requirements are being proposed: 1. Add new requirement to addresscemented jointsfor insulating barriers 2. Extend E39 mogul base switchless lampholder rating to 2000
2、W in Table 18 to address HID lamps with this rating 3. Add rating requirements for compact fl uorescent lampholders not in Table 20 4. Revise insulation-piercing terminal lampholder temperature test to also cover E12 (candelabra) lampholders 5. Add requirements for open rated E26 and E39 metal halid
3、e HID lampholders and revise conformity gauges to match current ANSI standard references 6. Add supplemental requirements to address lampholders for use with instant-start electronic ballasts 7. Add requirements to address non-screwshell type lampholders which have required a pulse rating in excess
4、of 5 kV 8. Add requirements covering GU24 and GU24-1 holders restricted to fl uorescent and LED self-ballasted lamp and fl uorescent lamp adapter use 9. Add requirements for weight, size, and moment limitations from previous edition of UL 496 10. Add supplemental requirements to address lampholder f
5、i ttings with photocontrol 11. Add temperature test requirements for dimmer-type lampholders 12. Clarify requirements for SPE and SPT cord for leads 13. Add requirements for proper spacing of male adapter installed in three-way lampholders 14. Add mold stress-relief test requirements for thermoplast
6、ic enclosures 15. Miscellaneous corrections and clarifi cations STP BALLOTS DUE: March 5, 2007 COMMENTS DUE: March 5, 2007 FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION For your convenience in review, proposed additions to existing requirements are shown underlined and proposed delet
7、ions are shown lined-out. 1. Add new requirement to address cemented joints for insulating barriers RATIONALE Proposal submitted by Dave Belt, UL. The current insulating barrier requirements in 4.9.11 for reduced spacing do not address how an insulated barrier is secured to the enclosure where the s
8、pacing from live parts to dead metal need to be determined and where there might be inadequate spacing between the barrier/enclosure interface. The proposed new paragraph derived from the UL Practical Application Guidelines (PAG) for Information Technology Equipment Safety Part-1: General Requiremen
9、ts, PAG 60950-1, for Cemented/ Uncemented Joints (No. 2.18.8-1) addresses this construction and would prohibit friction alone between two insulating parts used in lieu of normal spacing. An example of an unacceptable construction would be a back cover secured solely by friction such as a metal rivet
10、, where there is a potential electrical current path from a live part to the accessible dead metal part of the rivet through the cover barrier/ enclosure interface. PROPOSAL (NEW) 4.9.12 If the insulating barrier in 4.9.11 has an interface between two surfaces of insulating materials, which could al
11、low a current path through the interface, the surfaces shall be bonded together to form a solid homogeneous cemented joint. Materials acceptable to provide a cemented joint are: epoxy, acrylic adhesive, polyurethane adhesive, and solvent cements. Sonic welding may also be used to bond materials toge
12、ther. Friction interface alone is not considered acceptable. 2. Extend E39 mogul base switchless lampholder rating to 2000W in Table 18 to address HID lamps with this rating RATIONALE Proposal submitted by Dave Belt, UL. Table 18 is being proposed to be revised to extend the E39 (mogul) switchless l
13、ampholder rating from 1500W to 2000W as there are E39 HID lamps rated up to 2000W. Clauses 4.8.6.2 and 4.12.3 are also proposed to be revised as they also reference the maximum rating for the E39 lampholder. The term portable lamp in 4.8.6.2 is also being proposed to be revised to portable luminaire
14、 in accordance with present terminology. The marking in 7.4.7 is proposed to be revised in accordance with Note 2 of 4.8.6.2. PROPOSAL 4.8.6.2 For a mogul-base lampholder that is intended only for use in a luminaire or portable lamp luminaire, leads having an ampacity of 6 A or more shall be accepta
15、ble on a 750 W lampholder, and leads having an ampacity of 12 A or more are acceptable on a 1500 W lampholder. Leads having an ampacity of 16 A or more are acceptable on a 2000 W lampholder. JANUARY 19, 2007SUBJECT 496-2- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Note 1A Mogul-sc
16、rew lampholder rated 1500 W and marked in accordance with Clause 7.4.7 may employ leads having an ampacity of 8 A or more. Note 2A Mogul-screw lampholder rated 2000 W and marked in accordance with Clause 7.4.7 may employ leads having an ampacity of 11 A or more. 4.12.3 A pulse-rated lampholder shall
17、 have a peak starting pulse rating of: a) 4 or 5 KV for mogul screw-type rated 1500W or 2000W, 600V; b) 4 KV for medium-screw-type rated 660W, 600V; or c) 4 or 5 KV for other type lampholders. The lampholder shall comply with Clause 5.2.13. 7.4.7 A mogul-screw lampholder rated 1500 W or 2000 W and e
18、mploying leads having an ampacity of 8 A or 11 A, respectively, in accordance with Notes 1 and 2 of Clause 4.8.6.2 shall be marked Not For Use With Incandescent Lamps or an equivalent wording. Table 18 Ratings for screw lampholders (Clause 6.1.1) Trade size of lampholders and nominal diameter in mm
19、(inches) Rating of lampholder with a switching mechanism Ratings of switchless lampholders wattsvoltswattsvolts E39 (Mogul) 38.1 (1-1/2) 1500 750 250 250 1500 or 2000 1500 or 2000 600a 250 E29 (Admedium) 28.6 (1-1/8) 660 660 250 600 E26 (Medium) 25.4 (1) 660 250 250 250 660 660 600b 250 E17 (Interme
20、diate) 16.7 (21/32) 7512575250 E12 (Candelabra) 12.7 (1/2) 7512575125 E11 (Mini-can) 11.1 (7/16) 7512575125 E10 (Miniature) 9.5 (3/8) 7512575125 a Lampholders intended for use with pulse-rated lamps also have a 4 or 5 kV starting pulse-rating. b Lampholders intended for use with pulse-rated lamps al
21、so have a 4 kV starting pulse-rating. 3. Add rating requirements for compact fl uorescent lampholders not in Table 20 RATIONALE Proposal submitted by Dave Belt, UL. There are a number of single-based compact fl uorescent (CFL) lampholders that are not currently addressed by Table 20. A new clause 6.
22、2.2 is being proposed to be added to include ratings for single-based lampholders not covered by Table 20. JANUARY 19, 2007SUBJECT 496-3- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION PROPOSAL (NEW) 6.2.2 Single-based fl uorescent lampholders not covered by Table 20 shall be rated 25
23、0V or 600V. The lampholder marked wattage rating shall not be less than the lamp it is intended to accommodate. Note: For applicable lamp base wattage rating see Single-Based Fluorescent Lamps Dimensional and Electrical Characteristics, ANSI/IEC C78.901. 4. Revise insulation-piercing terminal lampho
24、lder temperature test to also cover E12 (candelabra) lampholders RATIONALE Proposal submitted by Dave Belt, UL. UL has received fi eld reports involving candelabra base lampholders that use insulation-piercing terminals and are used in luminaires in the base up position. These lampholders may be rat
25、ed up to 60W in the luminaire. UL 496 has requirements for medium base lampholders that use insulation- piercing terminals but not for candelabra base. There is no test program for candelabra base lampholders that use insulation-piercing terminals and the end-product standard for luminaires does not
26、 address the long term cycling effect that insulation-piercing terminals may have on their conductors. UL believes the test program in Clause 5.2.15 for insulation-piercing terminals is appropriate for all screw-base lampholders, not just medium base. The revisions are now being proposed to require
27、cycling temperature testing on insulation-piercing terminal contacts for all screw-base lampholders. SP type fl exible cord is being added as it is equivalent to SPE and SPT. The term portable lamp in 7.3.2 is also being proposed to be revised to portable luminaire in accordance with present termino
28、logy. PROPOSAL 4.8.3.1 E26 (medium) s Screw lampholders employing insulation-piercing terminals shall be specifi ed for use only with: a) fi xture wire and Type SP, SPE, or SPT fl exible cords that comply with UL 62, CAN/CSA C22.2 No. 49, and C22.2 No. 127; b) insulated conductors that comply with U
29、L 44 and CSA C22.2 No. 38; or c) insulated conductors that comply with UL 83 and CSA C22.2 No. 75. Note: A lampholder intended for temporary use in accordance with the National Electrical Code, ANSI/NFPA 70, and the Canadian Electrical Code, C22.2, Part I, need not comply with the requirements in th
30、is clause. JANUARY 19, 2007SUBJECT 496-4- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 4.8.3.2 Lampholders employing insulation-piercing terminals intended for use with Type SP, SPE, or SPT fl exible cord shall be for factory assembly only and shall be marked in accordance with Clau
31、se 7.3.2. 4.8.3.3 Lampholders employing insulation-piercing terminals intended for use with Type SP, SPE, or SPT fl exible cord shall be specifi ed for use with a minimum 105 C (221 F) rated fl exible cord. 4.8.3.4 Lampholders intended for use with Type SP, SPE, or SPT fl exible cord shall comply wi
32、th the temperature tests specifi ed in Clause 5.2.15, and shall be evaluated for the intended application, such as the marked wattage rating and the position of the lamp base, and as specifi ed by the manufacturer with regard to the type of fl exible cord used. 5.2.15.1.1 An E26 (medium) A screw lam
33、pholder employing insulation-piercing terminals specifi ed for use with Type SP, SPE, or SPT fl exible cord, as indicated in Clause 4.8.3.4, shall be tested in accordance with Clauses 5.2.15.1.2 5.2.15.5.4. 7.3.2 An E26 (medium) A screw lampholder employing insulation-piercing terminals intended for
34、 use with Type SP, SPE, or SPT fl exible cord (see Clause 4.8.3) shall have the smallest unit shipping container or a stuffer sheet provided with the container marked with the following information: a) For factory assembly into portable lamps and luminaires; b) the appropriate conductor size and fl
35、exible cord-type, and that a minimum 105 C (221 F) fl exible cord is required; c) whether supplemental strain relief is required, in accordance with Clause 5.2.15.3.3; and d) all necessary instructions for assembly, including polarization. 5. Add requirements for open rated E26 and E39 metal halide
36、HID lampholders and revise conformity gauges to match current ANSI standard references RATIONALE Proposal submitted by Dave Belt, UL. Requirements for open rated E26 and E39 metal halide HID lampholders are being proposed to be added to Tables 13 and 14. Note: When the twelfth edition of UL 496 was
37、initially being developed, the standard sheet numbers in Tables 13 and 14 were correct. However, subsequent to the publication of UL 496, the sheet numbers in ANSI C81.63 were changed to harmonize with the IEC gauges. The proposed sheet number changes in Tables 13 and 14 correlate with the current A
38、NSI references. Clause 2.32.1 is being proposed to be added to the Defi nitions. The proposed defi nition is based on the NEC requirement 410.73(f)(5) which requires that a luminaire intended for use with metal halide lamp that is not provided with a lamp containment barrier shall be provided with a
39、 physical means that only allows the use of a Type O (open-rated) lamp. The marking Type O or other distinctive marking or color will alert the user while relamping that the intended lamp is Type O, with an EX26 or EX39 base, rather than a Type E lamp with an E26 or E39 base which are similar in sha
40、pe but will not fi t. JANUARY 19, 2007SUBJECT 496-5- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION PROPOSAL (NEW) 2.32.1 Lampholder, open-rated a screw lampholder with an EX26 medium base or EX39 mogul base and intended for use with a Type “O” metal halide lamp. These lampholders hav
41、e a physical means that only allows the use of a lamp that is Type “O” and excludes lamps with an E26 or E39 base. (NEW) 7.1.4.1 An open-rated EX26 or EX39 screw lampholder shall be marked “Type O,” “Open Rated,” or shall have other distinctive marking, shape, or color to differentiate it from a non
42、-open rated lampholder. Table 13 Screwshell conformity gauges (Clause 5.2.4.1) Screw-typeGauge nameStandard sheet number E39 (Mogul)Threaded go gauge for E39 mogul screw lampholders3-190-2 7006-24E-1 Not go plug gauge for E39 mogul screw lampholders3-191-2 7006-26-4 EX39 (Mogul)Threaded go gauge for
43、 single contact mogul screw lampholders3-210-1 Not go plug gauge for single contact mogul screw lampholders3-191-3 Threaded gauge for testing contact making3-211-1 Protection against bulb-neck damage and testing contact making7006-24D-1 Maximum Insertion Torque Gauge3-213-1 Minimum Torsion Gauge3-21
44、2-1 E26d (Medium)Threaded go gauge for double-contact E26d medium-screw lampholders 3-174-1 7006-29K-1 Gauges for checking radial position of intermediate contact of double-contact E26d medium-screw lampholder 3-175-1 7006-29E-1 E26 (Medium)Threaded go gauge for E26 medium-screw lampholders3-169-1 7
45、006-25B-1 Not go plug gauge for E26 medium-screw lampholders3-170-1 7006-26A-1 EX26 (Medium)Threaded “go” gauge for EX26 medium-screw lampholders7006-25B-1 “Not-go” plug gauge for EX26 medium-screw lampholders7006-26A-1 Threaded gauge for testing contact making3-911-2 E17 (Intermediate)Threaded go g
46、auge for E17 intermediate-screw lampholders3-149-1 7006-25H-1 Not go plug gauge for E17 intermediate-screw lampholders3-150-1 7006-26C-1 E12 (Candelabra)Threaded go gauge for E12 candelabra screw lampholders3-136-2 7006-25C-1 Not go plug gauge for E12 candelabra screw lampholders3-137-2 7006-26B-1 E
47、11 (Mini-can)Threaded go gauge for E11 mini-can lampholders Gauge “A” contact making 3-124-2 7006-6A-1 Threaded no go gauge for E11 mini-can lampholders Gauge “B” contact making 3- 7006-6B-1 E10 (Miniature)Threaded go gauge for E10 miniature screw lampholders3-115-1 7006-25-7 Not go plug gauge for E
48、10 miniature screw lampholders3-116-1 7006-26-4 JANUARY 19, 2007SUBJECT 496-6- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 14 Screw base conformity gauges (Clause 5.2.4.1) Screw-typeGauge nameStandard sheet number E39 (Mogul)Threaded go ”Go” gauge for E39 mogul screw based la
49、mps3-185-2 7006-24B-1 Not go ring gauge for E39 mogul screw based lamps3-186-2 7006-24C-1 E26 (Medium)Threaded go ”Go” gauge for E26/E26d medium-screw based lamps 3-156-1 7006-27D-2 Not go ring gauge for E26/E26d medium-screw based lamps3-158-1 7006-29L-4 E17 (Intermediate)Threaded go ”Go” gauge for E17 intermediate-screw based lamps3-149-1 7006-27K-1 Not go ring gauge for E17 intermediate-screw based lamps3-150-1 7006-28F-1 E12 (Candelabra)Threaded go ”Go” gauge for E12 candelabra s