Product Data Sheet
A Regal Brand
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144X557
Replace “x” with 1, 2, or 3 for number of poles
Power Terminal Block
420 Amps 600 Volts AC/DC
Wire Range
• Line: (1) 600 kcmil - #4 AWG
• Load: (1) 600 kcmil - #4 AWG
Electrical Ratings
• 420 amps
• 600V per UL 1059 & CSA 22.2 No.158, Class B & C requirements
• Short circuit current ratings (SCCR): See SCCR section below for specications.
• CU7AL - 75°C connector terminal rating with copper or aluminum wire
• Factory & Field Wiring
Agency Compliance
• UR - UL Recognized Terminal Block, Evaluated to UL 1059, File No.XCFR2.E62806
• CSA - certifed to C22.2 No. 158, File No. LR19766 (wire classes B & C only)
• CE compliant to IEC 60947-7-1
Material Information
• Insulator base:
• Phenolic
• Flammability rating of insulator base UL94V0
• Insulator base temperature rating: -40°C to 150°C (UL RTI)
• Connector: aluminum, tin plated
• Terminal set screws: aluminum, tin plated
• Connector mounting screws: steel, zinc plated
• RoHS compliant
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Termination Specications
• Aluminum wire range: 600 kcmil - #4 AWG
• Wire strip length: 1 3/8 in. (35mm)
• Terminal screw drive: 1/2 in. (13mm) hex
Line & Load Side Wire Size
(CU Stranded) Torque Wires /
Terminal Wire Class (UL) 1
600 - 400 kcmil 56.5 N·m (500 lbf·in) 1 B, C
350 - 2 56.5 N·m (500 lbf·in) 1 B, C, G, H, I (DLO)
4 56.5 N·m (500 lbf·in) 1 B, C
1 For information on copper stranded wire classes please visit:
http://www.marathonsp.com/exible-stranded-wire.php
Short Circuit Current Ratings (SCCR)
• The suitable conductor ranges are limited to the table values only for achieving the SCCR in excess of
the default rating of 10,000A.
• Other conductor combinations within the “Terminal Specications” noted are suitable for achieving a
SCCR of 10,000A (the default rating of terminal blocks).
• Enclosure size – Investigated with a minimum 16x12x16 enclosure. Use in smaller enclosures is subject
to end use evaluation.
Wire
Class
Suitable
Conductors
Max Overcurrent Protection Fuse Required
Amp Rating / Class SCCR RMS
Sym. Amps
600V. Max
Line Load J T RK1 RK5 G CC
B, C 600 - 2 600 - 2 600 600 50,000
B, C 600 - 2 600 - 2 400 400 400 200 60 30 100.000
G, H, I 350 - 2 350 - 2 400 400 400 200 60 30 100,000
(*) 600 - 4 600 - 4 None 10,000
SCCR With Fuses
* Any wire class evaluated (see terminal specication section)
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Installation & Accessories
• Mounting (Panel):
• For use with #10 fastener.
• Torque mounting fastener to 25-30 lbf·in (2.8 - 3.4 N·m).
• Covers:
• Flat covers available upon request
• Catalog Number: CC 144x (replace “x” with number of poles)
• Covers are clear polycarbonate
• Accessory covers are not intended to provide insulation for electrical spacings.
• Marker Strip: white vinyl strip with mounting screws available.
• Printing options available, consult customer service for specications.
Drawing