technical data 1042 effective december 2015 supersedes february 2015 product description: cable limiters are intended to provide short- circuit protection to electrical systems, typically between the transformer and service entrance. should a short-circuit occur, the cable limiter removes the affected cable(s) from service and permits the other conductors to continue delivering power. cable limiters are often used in utility low volt - age networks and large multi-cable per phase service entrances. unlike fuses, cable limiters are selected by cable size rather than amperage, e.g., a 4/0 limiter will carry the current of a 4/0 cable. limiters are stable, totally self-contained, static devices with unchanging characteristics that operate without venting of ionized gases or explosive action. under high short-circuit conditions, limiters cut off fault currents within one-half cycle (0.008 seconds) and reduce insulation damage from the immense heat that is developed by sustained fault current flow. they confine damage to the point of the short-circuit and stop long-length cable burn-back and striking of multiple arcs to minimize damage to or eliminate damage to adjacent conductors. features and benefits: ? cable limiters enhance multi-conductor system reliability by isolating faulted conductors and taking them offline while the balance of the conductors continue delivering power to their circuits. this is why cable limiters are often used in utility low voltage networks and large multi-cable per phase service entrances. ? cable limiters enhance service entrance conductor short-circuit protection with current-limiting performance that exceed the typical protection offered by utility overcurrent protective devices. ? cable limiters meet many system requirements with 250vac or 600vac ratings for conductor sizes from 12awg to 1000kcmil and terminal options available that make them easy to install including: tube- to-tube (crimp), tube-to-bolt (crimp/bolt-in), compression rod-to-tube (crimp) and bolt-to- offset bolt (bolt-in) options. ? select cable limiters are ul ? listed under file e90818 for use on 600v circuit for the protection of faults up to 200ka. 250v and 600v cable limiters
2 technical data 1042 effective december 2015 250v uh series catalog symbol: uh__ applications: ? the 250vac uh cable limiters are deisnged specifically for use in residentail applications. ratings: ? volts: up to 250vac ? interrupting rating: 100ka, rms sym. terminals: ? center bolt-to-offset bolt copper or aluminum conductors conductors: ? copper or aluminum conductors are permitted per the listed cable size. select the catalog symbol for the system conductor size in the table below. dimensions - in (mm ) catalog symbol copper cable size aluminum cable size a 1 a 2 b c d e f g h i uha 2/0awg 4/0awg 1.06 (27.0) 1.19 (30.2) 1.44 (36.5) 1.00 (25.4) 0.75 (19.0) 0.12 (3.2) 0.56 (14.3) 0.19 (4.8) 0.59 (15.1) 0.41 (10.3) uhj-m 3/0awg 250kcmil 1.53 (38.9) 1.75 (44.4) 1.59 (40.5) 1.50 (38.1) 1.00 (25.4) 0.25 (6.3) 0.87 (22.2) 0.34 (8.6) 0.69 (17.5) 0.56 (14.3) uhj-t 350kcmil 500kcmil 1.53 (38.9) 1.75 (44.4) 1.59 (40.5) 1.50 (38.1) 1.00 (25.4) 0.25 (6.3) 0.87 (22.2) 0.34 (8.6) 0.69 (17.5) 0.56 (14.3) uhj-w 600kcmil 800kcmil 1.53 (38.9) 1.75 (44.4) 1.59 (40.5) 1.50 (38.1) 1.00 (25.4) 0.25 (6.3) 0.87 (22.2) 0.34 (8.6) 0.69 (17.5) 0.56 (14.3) c a 1 f b a 2 e d e i g h bolt terminal detail cable limiters eaton.com/bussmannseries
3 technical data 1042 effective december 2015 terminals: ? tube-to-tube copper conductor only dimensions - in (mm) catalog symbol copper cable size a b c d e kcy 4awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.31 (7.9) 0.25 (6.4) kcz 3awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.34 (8.7) 0.28 (7.1) KCA 2awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.44 (11.1) 0.31 (7.9) kcb 1awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.47 (11.9) 0.34 (8.7) kcc 1/0awg 1.5 (38.1) 2.625 (66.7) 1.25 (31.8) 0.52 (13.1) 0.39 (9.9) kcd*, ? 2/0awg 1.63 (41.3) 2.625 (66.7) 1.25 (31.8) 0.44 (14.3) 0.70 (11.1) kce 3/0awg 1.63 (41.3) 3.63 (92.1) 1.44 (36.5) 0.61 (15.5) 0.48 (12.3) kcf 4/0awg 1.75 (44.5) 3.63 (92.1) 1.44 (36.5) 0.34 (17.5) 0.55 (14.0) kch 250kcmil 1.88 (47.6) 3.63 (92.1) 1.44 (36.5) 0.75 (19.0) 0.59 (15.0) kcj* ? 350kcmil 2.0 (50.8) 3.63 (92.1) 1.63 (41.3) 0.88 (22.2) 0.70 (17.9) kcm*, ? , ?? 500kcmil 2.88 (73.0) 3.08 (78.2) 1.88 (47.6) 1.06 (27.0) 0.83 (21.0) kcv 600kcmil 3.5 (88.9) 3.08 (78.2) 1.88 (47.6) 1.155 (29.3) 0.92 (23.4) kcr*, ? 750kcmil 3.5 (88.9) 3.75 (95.25) 2.5 (63.5) 1.31 (33.3) 1.06 (27.0) kcs 1000kcmil 5.0 (127.0) 3.75 (95.25) 2.5 (63.5) 1.56 (39.7) 1.22 (31.0) * ul listed, file e90818, 600vac, 200ka i.r. ? available with shrink tube Cv suffix. ?? available with molded rubber boot -b suffix. boot can be purchased separately, order part# - boot-kcm b a a c e d 600v k series catalog symbol: k__ applications: the 600vac k cable limiters are designed for use on non-residential 277/480, 120/208 and 120/240 volt systems. ratings: ? volts: up to 600vac ? interrupting rating: 200ka, rms sym. agency information: ? kcd, kcj, kcm, kcr, kdm, kdr, kdp and kfm cable limiters are ul listed under file e90818 for only copper conductors. terminals: ? tube-to-tube ? tube-to-offset bolt ? compression rod-to-tube ? center bolt-to-offset bolt conductors: ? copper only on: ? tube-to-tube ? tube-to-offset bolt ? compression rod-to-tube ? copper or aluminum on ? center bolt-to-offset bolt cable limiters eaton.com/bussmannseries
4 technical data 1042 effective december 2015 catalog symbol copper cable size a b c d e f g h j kqv 12awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.19 (4.8) 0.125 (3.2) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kqt 10awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.23 (6.0) 0.14 (3.6) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kfz 8awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.23 (6.0) 0.16 (4.0) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kig 6awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.31 (7.9) 0.16 (4.0) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kdy 4awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.31 (7.9) 0.25 (6.4) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kda 2awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.44 (11.1) 0.31 (7.9) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kdb 1awg 1.25 (31.8) 2.88 (73.0) 1.06 (27.0) 0.47 (11.9) 0.34 (8.7) 3.31 (84.1) 0.72 (18.3) 0.19 (4.8) 1.125 (28.6) kdc 1/0awg 1.5 (38.1) 2.625 (66.7) 1.25 (31.8) 0.52 (13.1) 0.39 (9.9) 3.38 (85.7) 0.88 (22.2) 0.25 (6.4) 1.125 (28.6) kdd 2/0awg 1.63 (41.3) 2.625 (66.7) 1.25 (31.8) 0.56 (14.3) 0.44 (11.1) 3.38 (85.7) 0.88 (22.2) 0.25 (6.4) 1.125 (28.6) kde 3/0awg 1.63 (41.3) 3.63 (92.1) 1.44 (36.5) 0.61 (15.5) 0.48 (12.3) 3.38 (85.7) 0.97 (24.6) 0.25 (6.4) 1.125 (28.6) kdf 4/0awg 1.75 (44.5) 3.63 (92.1) 1.44 (36.5) 0.69 (17.5) 0.55 (13.9) 3.38 (85.7) 0.97 (24.6) 0.25 (6.4) 1.125 (28.6) kdh 250kcmil 1.88 (47.6) 3.63 (92.1) 1.44 (36.5) 0.75 (19.0) 0.59 (15.0) 3.38 (85.7) 0.97 (24.6) 0.25 (6.4) 1.125 (28.6) kdj? 350kcmil 2.0 (50.8) 3.63 (92.1) 1.63 (41.3) 0.88 (22.2) 0.70 (17.8) 3.38 (85.7) 1.06 (27.0) 0.25 (6.4) 1.125 (28.6) kdm*,? 500kcmil 2.88 (73.0) 3.08 (78.2) 1.88 (47.6) 1.06 (27.0) 0.83 (21.0) 3.38 (85.7) 1.19 (30.2) 0.25 (6.4) 1.63 (41.3) kdu 600kcmil 3.5 (88.9) 3.75 (95.2) 2.5 (63.5) 1.16 (29.4) 0.92 (23.4) 3.5 (88.9) 1.5 (38.1) 0.25 (6.4) 2.0 (50.8) kdr*, ?? 750kcmil 3.5 (88.9) 3.75 (95.2) 2.5 (63.5) 1.31 (33.3) 1.06 (27.0) 3.5 (88.9) 1.5 (38.1) 0.25 (6.4) 2.0 (50.8) * ul listed, file e90818, 600vac, 200ka i.r. ? available with molded rubber boot -b suffix. boot can be purchased separately, order part# - boot-kdm ?? available with shrink tube Cv suffix. a c e d b f g h j 1.63" (41.3mm) 0.56" (14.3mm) 0.56" (14.3mm) 0.125" (3.18mm) bolt terminal detail terminals: ? tube-to-offset bolt copper conductor only dimensions - in (mm) cable limiters eaton.com/bussmannseries
5 technical data 1042 effective december 2015 catalog symbol copper cable size a b c d e f g kex 4/0awg 2.5 (63.5) 3.63 (92.1) 1.75 (44.5) 1.44 (36.5) 0.69 (17.5) 0.55 (13.9) 0.5 (12.7) kfh-a 250kcmil 2.5 (63.5) 3.63 (92.1) 1.88 (47.6) 1.44 (36.5) 0.75 (19.0) 0.28 (15.1) 0.56 (14.3) kqo 350kcmil 2.5 (63.5) 3.63 (92.1) 2.0 (50.8) 1.63 (41.3) 0.88 (22.2) 0.70 (17.8) 0.81 (20.6) kdt 500kcmil 2.5 (63.5) 3.08 (78.2) 2.88 (73.0) 1.88 (47.6) 1.06 (27.0) 0.83 (21.0) 0.81 (20.6) catalog symbol copper cable size aluminum cable size a b c d e f kpf 4/0awg 4/0awg 3.38 (85.7) 3.63 (92.1) 1.44 (36.5) 1.125 (28.6) 1.125 (28.6) 0.97 (24.6) kft 250kcmil 250kcmil 3.38 (85.7) 3.63 (92.1) 1.44 (36.5) 1.125 (28.6) 1.125 (28.6) 0.97 (24.6) kew 350kcmil 350kcmil 3.38 (85.7) 3.63 (92.1) 1.63 (41.3) 1.125 (28.6) 1.125 (28.6) 1.06 (27.0) kdp* 500kcmil 500kcmil 3.38 (85.7) 3.08 (78.2) 1.88 (47.6) 1.5 (38.1) 1.63 (41.3) 1.19 (30.2) kfm* 750kcmil 750kcmil 3.50 (88.9) 3.75 (95.3) 2.50 (63.5) 2.0 (50.8) 2.00 (50.8) 1.50 (38.1) * ul listed for copper only, file e90818, 600vac, 200ka a.i.r. terminals: ? compression rod-to-tube copper conductor only dimensions - in (mm) terminals: ? center bolt-to-offset bolt copper or aluminum conductors dimensions - in (mm) g d f e c b a c a f b a 0.25" (6.4mm) d 0.25" (6.4mm) 1.63" (41.3mm) 0.56" (14.3mm) 0.56" (14.3mm) 0.125" (3.18mm) bolt terminal detail e cable limiters eaton.com/bussmannseries
technical data 1042 effective december 2015 cable limiters the only controlled copy of this data sheet is the electronic read-only version located on the eaton network drive. all other copies of this document are by definition uncontrolled. this bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. eaton also reserves the right to change or update, without notice, any technical information contained in this bulletin. once a product has been selected, it should be tested by the user in all possible applications. peak let-through current time-current characteristics - total clear 70 100 1000 10,000 30,000 0.1 0.01 1 10 100 12 awg 10 awg 8 awg 4 awg 3 awg 2 awg 1 awg 2/0 awg 3/0 awg 4/0 awg 250 kcmil 350 kcmil 500 kcmil 750 kcmil 1000 kcmil 6 awg 1/0 awg curr ent in amps t ime in seconds cable size b a 400 1000 10,000 100,000 200,000 1000 kcmil 750 kcmil 500 kcmil 350 kcmil 250 kcmil 4/0 awg 1/0 awg 1 awg 2 awg 3 awg 4 awg 6 awg 8 awg 10 awg 12 awg 100,000 10,000 1000 100 3/0 awg 2/0 awg pr ospective short-cir cuit curr ent symmetrical rms amps instantaneous p eak let-t hr ough curr ent in amps cable size eaton and bussmann are valuable trademarks of eaton in the us and other countries. you are not permitted to use the eaton trademarks without prior written consent of eaton. ul is a registered trademark of the underwriters laboratories, inc. eaton 1000 eaton boulevard cleveland, oh 44122 united states eaton.com bussmann division 114 old state road ellisville, mo 63021 united states eaton.com/bussmannseries ? 2015 eaton all rights reserved printed in usa publication no. 1042 C bu-sb14632 december 2015 for eatons bussmann series product information, call 1-855-287-7626 or visit: eaton.com/bussmannseries follow us on social media to get the latest product and support information. prospective short-circuit current symmetrical rms amps instantaneous peak-let-through current in amps time in seconds current in amps cable size
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