Product Data Sheet
A Regal Brand
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144X551
Replace “x” with 1, 2, or 3 for number of poles
Power Terminal Block
380 Amps 600 Volts AC/DC
Wire Range
• Line: (1) 500 kcmil - #4 AWG
• Load: (6) #2 - #14 AWG
Electrical Ratings
• 380 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
www.marathonsp.com 2PDS 0074 REV-D 01/13/17
Termination Speci cations
• Aluminum wire range: 500 kcmil - #4 AWG
• Wire strip length: 1 5/16in. (33mm)
• Terminal screw drive: 3/8 in. (9.5mm) hex
Line Side Wire Size
(CU Stranded) Torque Wires /
Terminal Wire Class (UL) 1
500 kcmil 42.4 N·m (375 lbf·in) 1 B, C
400 - 2 42.4 N·m (375 lbf·in) 1 B, C, G, H, I (DLO)
4 42.4 N·m (375 lbf·in) 1 B, C
1 For information on copper stranded wire classes please visit:
http://www.marathonsp.com/ exible-stranded-wire.php
2 Multiple wire rating applies to classes B, C, & I only
• Solid copper wire range: #10 - 14
• Aluminum wire range: #2 - #8 AWG
• Wire strip length (load side): Top Row: 3/4 in. (19mm)
Bottom Row: 1 3/16 in (30mm)
• Terminal screw drive: slotted
Load Side Wire Size
(CU Stranded) Torque Wires /
Terminal Wire Class (UL) 1
2 AWG 5.6 N·m (50 lbf·in) 1 B, C
4 - 6 5.1 N·m (45 lbf·in) 1 B, C, G, H, I (DLO)
8 4.5 N·m (40 lbf·in) 1-2 2B, C, G, H, I (DLO)
10 4 N·m (35 lbf·in) 1 - 2 B, C, I (DLO)
12 - 14 4 N·m (35 lbf·in) 1-4 B, C
1-2 I (DLO)
www.marathonsp.com 3PDS 0074 REV-D 01/13/17
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 16x12x6 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 500 - 3/0 2 - 8 500 500 400 200 60 30 100,000
B, C 500 - 4 2 - 10 200 200 200 100 60 30 100.000
G, H, I 350 - 2 4 - 14 150 150 100 30 60 30 100,000
(*) 500 - 4 2 - 14 None 10,000
SCCR With Fuses
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: CH144x (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.
* Any wire class evaluated (see terminal speci cation section)
www.marathonsp.com 4PDS 0074 REV-D 01/13/17
Drawing
