1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): WHXS, WIAX, WIZZ, WHTY2Standard Number: UL 98Standard Title: Standard for Enclosed and Dead-Front SwitchesEdition Date: February 25, 2004Edition Number: 13Se
3、ction / Paragraph Reference: 7.2.8, 8.2, Tables 16, 19 and 22Subject: Add Requirements for Class CA, AB and G FusesDECISION:The following revisions address missing requirements for Class CA, CB and G fuses to UL 98, whichpresently allows their use:Table 16Maximum acceptable temperature risesMaterial
4、 and components CA. Terminals for field-installed conductors:1. Unfused switches 502. Fused switches for use with 60C wire and tested with dummy fuses 303. Fused switches for use with 75C wire and tested with dummy fusesa454. Class CA, CC, G, and T fused switches rated 100 A or less for use with 60C
5、 wire 505. Class CA, CC, G, and T fused switches rated 100 A or less for use with 75C wirea656. Class J (rated more than 200 A), Class T (rated more than 100 A), Class L and Class C fusedswitches60B. All other current-carrying parts:1. Unfused switches 502. Fused switches for use with 60C wire and t
6、ested with dummy fuses 303. Fused switches for use with 75C wire and tested with dummy fusesa504. Class J (rated more than 200 A), Class T, Class L, and Class C fused switches 85C. Other materials and components:1. Wire insulation or insulating tubing 352. Electrical tape 553. Varnished cloth insula
7、tion 604. Fiber used as electrical insulation 655. Sealing compound 506. Phenolic composition used as electrical insulation or as a part whose failure would result in anundesired condition1257. Other insulating materials. baApplicable to a connector for copper wire. Also applicable to a connector fo
8、r aluminum wire or an aluminum-bodiedconnector, if the connector has a temperature rating of 90C.bRated temperature limit of material minus test ambient temperature.7.2.8 A switch employing the following fuse Classes shall be tested with fuses in place and when carrying80 percent of its rated curren
9、t continuously:1. C, CA, CB, G, L, or T;, or C fuses orUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2. Class J rated 400 or 600 A Class J fuses shall be tested with fuses in place and whencarrying 80 percent of its rated current continuousl
10、y.Table 17Overload-test currents in amperes for alternating-current switchesSwitch inrating120 V 240 V 480 V 600 VkW hp 1 24-Wire3 1 24-Wire3 1 24-Wire3 1 24-Wire30.125 1/6 26.4 13.2 0.187 1/4 34.8 17.4 0.248 1/3 43.2 21.6 0.373 1/2 58.8 40 29.4 20 10 80.56 3/4 82.8 28.8 50 41.4 14.4 25 21 7.2 12.5
11、16.8 6 100.746 1 96 38.4 60 48 19.2 30 24 9.6 15 19.2 7.8 121.119 1-1/2 120 54 80 60 27 40 30 13.8 20 24 10.8 161.492 2 144 70.8 100 72 35.4 50 36 18 25 28.8 14.4 202.238 3 204 99.6 102 49.8 64 51 25.2 32 40.8 19.8 25.63.73 5 336 158 168 79.2 92 84 39.6 46 67.2 31.8 36.85.6 7-1/2 480 228 240 114 127
12、 126 54 63.5 96 48 50.87.46 10 600 288 300 144 162 156 72 81 120 60 64.811.19 15 432 216 232 108 116 84 9314.92 20 564 282 290 138 145 114 11618.65 25 708 354 365 174 183 144 14622.38 30 828 414 435 210 218 168 17429.84 40 1 080 540 580 270 290 216 23237.3 50 1 360 678 725 336 363 270 29044.76 60 87
13、0 435 34855.95 75 1 085 543 43474.6 100 1 450 725 58093.25 125 1 815 908 726111.9 150 2 170 1 085 868149.2 200 2 900 1 450 1 160186.5 250 1 825 1 460223.8 300 2 200 1 760261.1 350 2 550 2 040298.4 400 2 900 2 320335.7 450 3 250 2 600373.0 500 3 625 2 900STANDARD NUMBER: UL 98 -2-UL COPYRIGHTED MATER
14、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 18Overload test currents in amperes for direct-current switchesRating 125 V 250 V 600 VkW hp0.373 1/2 32.4 16.2 0.56 3/4 45.6 22.8 9.60.746 1 38 19 71.119 1-1/2 53 26 101.492 2 68 34 142.238 3 100 49 203.730 5
15、 160 80 335.600 7-1/2 232 116 487.460 10 304 152 6411.19 15 448 220 9214.92 20 592 288 12418.65 25 356 15222.38 30 424 18429.84 40 560 24437.30 50 692 300Table 19Endurance test cyclesSwitch rating inamperesNumber of cycles ofoperation per minuteaNumber of cycles of operationWith current Without curr
16、ent Total30 100 and less 6 6 000 4 000 10 000200 5 6 000 2 000 8 000400 4 1 000 5 000 6 000600 3 1 000 4 000 5 000800 2 500b3 000 3 5001 200 1 500b2 000 2 5001 600 2 500 1 500 2 000 2 500c3 000 4 000 1d400 1 100 1 500caThe indicated number of cycles of operation per minute applies only to that part
17、of the test made with current. When nocurrent is used, the switch may be operated at any convenient speed.bFor a switch marked For isolating use only (see 9.2.10) the switch is not operated with current in the endurance test.cFor switches rated over 1 200 A at 250 V or less and marked in accordance
18、with 9.2.10, the total number of operations is1000 without current.dRate of operation: 1 cycle per minute for first ten operations; thereafter in groups of five (at 1 cycle per minute) with aninterval between groups that is agreeable to all concerned.STANDARD NUMBER: UL 98 -3-UL COPYRIGHTED MATERIAL
19、 NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 20Endurance-test currents in amperes for alternating-current switchesSwitch ratingin120 Va240 V 480 V 600 VkW hp 1 24-Wire3 1 24-Wire3 1 24-Wire3 1 24-Wire30.125 1/6 4.4 2.2 0.187 1/4 5.8 2.8 0.248 1/3 7.2 3.6 0.
20、373 1/2 9.8 4.0 4.4 4.9 2.0 2.2 1.0 1.1 0.8 0.90.560 3/4 13.8 4.8 6.4 6.9 2.4 3.2 3.5 1.2 1.6 2.8 1.0 1.30.746 1 16 6.4 8.4 8 3.2 4.2 4.0 1.6 2.1 3.2 1.3 1.71.119 1-1/2 20 9.0 12 10 4.5 6 5.0 2.3 3 4.0 1.8 2.41.492 2 24 11.8 13.6 12 5.9 6.8 6.0 3.0 3.4 4.8 2.4 2.72.238 3 34 16.6 19.2 17 8.3 9.6 8.5
21、4.2 4.8 6.8 3.3 3.93.73 5 56 26.4 30.4 28 13.2 15.2 14. 6.6 7.6 11.2 5.3 6.15.60 7-1/2 80 38 44 40 19 22 21 9 11 16 8 97.46 10 100 48 56 50 24 28 26 12 14 20 10 1111.19 15 135 72 84 68 36 42 34 18 21 27 14 1714.92 20 94 108 88 47 54 44 23 27 25 19 2218.65 25 118 136 110 59 68 55 29 34 44 24 2722.38
22、30 138 160 136 69 80 68 35 40 54 28 3222.84 40 180 208 176 90 104 88 45 52 70 36 4137.30 50 226 260 216 113 130 108 56 65 86 45 5244.76 60 154 77 6255.95 75 192 96 7774.60 100 248 124 9993.25 125 312 156 125111.9 150 360 180 144149.2 200 480 240 192186.5 250 302 242223.8 300 361 289261.1 350 414 336
23、298.4 400 477 382335.7 450 515 412373.0 500 590 472aFor 127 V ratings, the test is conducted at rated voltage with the currents in this column.STANDARD NUMBER: UL 98 -4-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 21Endurance-test cur
24、rents in amperes for direct-current switchesSwitch rating 125 V 250 V 600 VkW hp0.373 1/2 5.4 2.7 0.56 3/4 7.6 3.8 0.746 1 9.4 4.7 1.81.119 1-1/2 13.2 6.6 2.61.462 2 17 8.5 3.42.238 3 25 12.2 5.03.73 5 40 20 8.35.60 7-1/2 58 29 127.46 10 76 38 1611.19 15 112 55 2314.92 20 148 72 3118.65 25 89 8922.3
25、8 30 106 4629.84 40 140 6137.30 50 173 758.2 Current8.2.1 The current rating of a general-use switch shall be 15, 20, 30, 60, 100, 200, 400, 600, 800, 1 200,1 600, 2 000, 2 500, 3 000, 3 500, or 4 000 A.Table 22Peak-let-through currents and clearing I2t for fusesFuse rating,amperesBetween threshold
26、and 50 kA 100 kA 200 kAIpx103I2tx103Ipx103I2tx103Ipx103I2tx103Class C Fuses03121516 06003212 40750204074000416 10100006080 525000801 1200 1240000Class CA030 8 6Class CB030 10 10STANDARD NUMBER: UL 98 -5-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION
27、 FROM ULTable 22 ContinuedFuse rating,amperesBetween threshold and 50 kA 100 kA 200 kAIpx103I2tx103Ipx103I2tx103Ipx103I2tx1033160 15 60Class CC Fuses015323243623243521 30 6 7 7.5 7 12 7Class G Fuses01 10.8 23 1.5 1.246 21.8 710 32.801115 43.81620552125 6621 26 30 773135 814 3640 8.5 174145 918.5 465
28、0 9.5 2153160 10.5 25 300-Volt Class T Fuses0 30 5 3.5 7 3.5 9 3.53160 7 15 9 15 12 1561 9 4012401540101 200 13 150 16 150 20 150201 400 22 550 28 550 35 550401 600 29 1000 37 1000 46 1000601 800 37 1500 50 1500 65 1500801 1200 50 3500 65 3500 80 4000Class J and 600-Volt Class T Fuses030 6 7 7.5 7 1
29、2 731 60 8 30 10 30 16 3061 100 12 60 14 80 20 80101 200 16 200 20 300 30 300201 400 25 1000 30 1100 45 1100401 600 35 2500 45 2500 70 2500601 800 50 4000 55 4000 75 4000Class L Fuses601 800 80 10000 80 10000 80 10000801 1200 80 12000 80 12000 120 150001201 1600 100 22000 100 22000 150 300001601 200
30、0 110 35000 120 35000 165 400002001 2500 165 75000 180 750002501 3000 175 100000 200 1000003001 4000 220 150000 250 150000STANDARD NUMBER: UL 98 -6-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 22 ContinuedFuse rating,amperesBetween th
31、reshold and 50 kA 100 kA 200 kAIpx103I2tx103Ipx103I2tx103Ipx103I2tx1034001 5000 350000 300 3500005001 6000 350000 350 500000Class RK5 Fusesa0311501150145031 60 20 200 21 200 26 20061 100 22 500 25 500 32 500101 200 32 1600 40 1600 50 2000201 400 50 5200 60 5000 75 6000401 600 65 10000 80 10000 100 1
32、2000aThe value for a Class RK5 fuse is to be used when a Class RK1 fuse is specified for overcurrent protection.Table 26Power ratings of fused switchesFuse-holder,ampsSwitchrating involtsPower ratings, kilowatts (horsepower)2-pole single-phase 2-pole DC 3-pole, 3-phase 4-pole, 2-phaseStandard Maximu
33、maStandard MaximumaStandard MaximumaStandard Maximuma15 120-127AC0.124 (1/6) 0.249 (1/3) 0.373 (1/2) 0.56 (3/4) 0.56 (3/4) 1.119(1-1/2)20 120-127AC0.186 (1/4) 0.373 (1/2) 0.56 (3/4) 0.746 (1) 0.746 (1) 1.492 (2)30 120 AC127 AC0.373 (1/2) 1.492 (2) 1.119(1-1/2)2.238 (3) 1.492 (2) 2.238 (3)60 120 AC12
34、7 AC1.119(1-1/2)2.238 (3) 2.238 (3) 5.60 (7-1/2) 2.238 (3) 7.46 (10)15 125 DC 0.746 (1) 0.746 (1) 20 125 DC 1.119(1-1/2)1.119(1-1/2)30 125 DC 1.492 (2) 2.238 (3)60 125 DC 3.73 (5)15 240 AC 0.373 (1/2) 0.746 (1) 0.746 (1) 1.492 (2) 1.119(1-1/2)2.238 (3)20 240 AC 0.56 (3/4) 1.119(1-1/2) 1.119(1-1/2)2.
35、238 (3) 1.462 (2) 3.73 (5)30 240 AC 1.119(1-1/2)2.238 (3) 2.238 (3) 5.60 (7-1/2) 2.238 (3) 7.46 (10)60 240 AC 2.238 (3) 7.46 (10) 5.60 (7-1/2) 11.19 (15) 5.60 (7-1/2) 14.92 (20)100 240 AC 5.60 (7-1/2) 11.19 (15) 11.19 (15) 22.38 (30) 11.19 (15) 22.38 (30)200 240 AC 11.19 (15) 18.65 (25) 47.60 (60) 2
36、2.38 (30) 37.30 (50)400 240 AC 37.30 (50) 93.25 (125) 37.30 (50)600 240 AC 55.95 (75) 149.2 (200)800 240 AC 74.60 (100) 186.5 (250)15 250 DC 1.462 (2) 1.462 (2) STANDARD NUMBER: UL 98 -7-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 26
37、 ContinuedFuse-holder,ampsSwitchrating involtsPower ratings, kilowatts (horsepower)2-pole single-phase 2-pole DC 3-pole, 3-phase 4-pole, 2-phaseStandard MaximumaStandard MaximumaStandard MaximumaStandard Maximuma20 250 DC 2.238 (3) 2.238 (3) 30 250 DC 3.73 (5)60 250 DC 7.46 (10)100 250 DC 14.92 (20)
38、200 250 DC 29.84 (40)400 250 DC 37.30 (50)15 480 AC 1.119(1-1/2)2.238 (3) 2.238 (3) 3.73 (5) 2.238 (3) 5.60 (7-1/2)20 480 AC 1.462 (2) 3.73 (5) 2.238 (3) 5.60 (7-1/2) 3.73 (5) 7.46 (10)30 480 AC 2.238 (3) 5.60 (7-1/2) 3.73 (5) 11.19 (15) 5.60 (7-1/2) 14.92 (20)60 480 AC 3.73 (5) 14.92 (20) 11.19 (15
39、) 22.38 (30) 11.19 (15) 29.84 (40)100 480 AC 7.46 (10) 22.38 (30) 18.65 (25) 44.76 (60) 18.65 (25) 37.30 (50)200 480 AC 18.65 (25) 37.30 (50) 37.30 (50) 93.25 (125) 37.30 (50)400 480 AC 74.66 (100) 186.5 (250)600 480 AC 111.9 (150) 298.4 (400)800 480 AC 149.2 (200) 373 (500)15 600 AC 2.238 (3) 5.60
40、(7-1/2) 2.238 (3) 5.60 (7-1/2)20 600 AC 3.73 (5) 7.46 (10) 3.73 (5) 7.46 (10)30 600 AC 2.238 (3) 7.46 (10) 5.60 (7-1/2) 14.92 (20) 7.46 (10) 18.65 (25)60 600 AC 7.466 (10) 18.65 (25) 11.19 (15) 37.30 (50) 14.92 (20) 37.30 (50)100 600 AC 11.19 (15) 29.84 (40) 22.38 (30) 55.95 (75) 22.38 (30) 37.30 (5
41、0)200 600 AC 22.38 (30) 37.30 (50) 44.76 (60) 111.9 (150) 37.30 (50)400 600 AC 93.25 (125) 261.1 (350)600 600 AC 149.2 (200) 373 (500)800 600 AC 186.5 (250) 373 (500)15 600 DC 3.73 (5) 3.73 (5) 20 600 DC 5.60 (7-1/2) 5.60 (7-1/2)30 600 DC 7.466 (10) 11.19 (15)60 600 DC 18.65 (25) 22.38 (30)100 600 D
42、C 29.84 (40) 37.30 (50)200 600 DC 37.30 (50)aSee 9.2.7 and 9.2.7.1.RATIONALE FOR DECISION:This proposal is to add missing requirements for Class CA, CB and G fuses to UL 98, which presentlyallows their use.1. Class G fuses have different physical sizes at 15, 20 and 30A. UL 98 already hasrequirement
43、s for 30A. The changes in this proposal include 15 and 20 A ratings.2. Table 16 and 7.2.8 are revised as Class CA, CB and G fuses have temperature rises withintheir respective standards that are equal to or greater than the allowable rise for Class T fuses.STANDARD NUMBER: UL 98 -8-UL COPYRIGHTED MA
44、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3. Based on the LRA of the NEC, the overload tables were revised (for small motors notincluded in the NEC tables, 430.110 (C)(3) of the NEC requires the LRA to be calculated as 6xFLA).4. Based on the FLA of the N
45、EC, the endurance tables were revised.5. Table 22 is revised to include values for Class CA and CB fuses and correct the number oflines for Class G fuses. While the Class G standard allows different let-through values for thedifferent fuse ratings, only the let-through values for the highest rating
46、within the fuse Class sizeare necessary within UL 98.6. Maximum and standard hp ratings in Table 26 for 15A and 20A fuses were determinedbased on 430.52 of the NEC using the following rationale:a. The “Standard” rating correlates to non-time delay fuses, with a maximum fuse sizeof 300% FLA for ac an
47、d 150% for dcb. The “Maximum” rating correlates to time delay fuses, with a maximum fuse size of175% FLA for ac and 150% for dcCopyright 2016 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying t
