ABB - Installation Products RS403 - Aluminum 6 inch Service Entrance Compression Reducing Splice for Wire Range - End A: 400-336 kcmil, End B: 4/0 Stranded, Dies: B20AH, 1-5/16, 318 Dual Rated for Aluminum and Copper Conductors.
ABB - Installation Products

RS403

UPC: 783786086566


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Overview

The ABB RS403 is a 6-inch aluminum service entrance compression reducing splice designed for reliable connections between large aluminum conductors (400-336 kcmil) and smaller stranded conductors (4/0 AWG). This splice is dual-rated for both aluminum and copper conductors, eliminating the need for separate components when transitioning between conductor types. The RS403 uses ABB’s B20AH dies for consistent, high-integrity compression joints that meet NEC requirements for service entrance applications. With a compact 1-5/16-inch size, it fits standard junction boxes and enclosures while providing a secure mechanical and electrical connection. Ideal for utility, commercial, and industrial installations where conductor size transitions are required, the RS403 ensures long-term performance with corrosion-resistant aluminum construction and UL-listed compression technology. No additional tools beyond standard compression equipment are required for installation.
  • 6-inch aluminum service entrance compression splice
  • Handles 400-336 kcmil (End A) to 4/0 AWG stranded (End B)
  • Dual-rated for aluminum and copper conductors
  • Uses ABB B20AH dies for consistent compression joints
  • Compact 1-5/16-inch size fits standard enclosures

Specifications

Connection Type
Compression Splice
Material
Aluminum
Series
RS
Size
6 Inch
Package Dimensions (L x W x H)
0.01 IN x 0.01 IN x 0.01 IN
Package Dimensions (L x W x H)
0.0254 cm x 0.0254 cm x 0.0254 cm
Package Weight (Imperial)
1.0100 L
Package Weight (Metric)
0.4580 kg
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AS-K1-H6

Power Distribution Block (1) 2/0-14 AWG Primary (6) 4-14 AWG Secondary Power Distribution Blocks are made of high strength, high-conductivity aluminum alloy and are mounted in a high-strength glass-filled polyester base. Each block can stand alone or combine with other blocks to form a multi-block set.
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60975

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RS253

Aluminum 6 inch Service Entrance Compression Reducing Splice for Wire Range - End A: 300-250 kcmil, End B: 4/0, Die: B20AH, 1-5/16, 318 Dual Rated for Aluminum and Copper Conductors
Aluminum 4-1/2 Inch Service Entrance Compression Splice for Wire Range - End A: 500-450 kcmil, End B: 500-450 kcmil, Die: B20AH, 318, 1-5/16 Dual Rated for Aluminum and Copper Conductors

RS4545

Aluminum 4-1/2 Inch Service Entrance Compression Splice for Wire Range - End A: 500-450 kcmil, End B: 500-450 kcmil, Die: B20AH, 318, 1-5/16 Dual Rated for Aluminum and Copper Conductors
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RS8080

Aluminum 4-1/2 Inch Service Entrance Compression Splice for Wire Range - End A: 800-750 kcmil, End B: 800-750 kcmil, Die: 6030AH, 352. For Aluminum to Copper Conductor.
Compression Stirrup Contax Filled - Wire Range: 2-6 ASCR, 2 Str.-6 Sol. AWG, Stirrup 2 Sol. Copper, winged, 2 stirrups

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Aluminum 5-3/8 inch Partial-Tension Distribution Compression Splice for Wire Range: 226.8(7,19), Hydraulic Dies: B75AH, 251, 11/2. For Aluminum Conductors.

Frequently Asked Questions

What conductor sizes does the RS403 accommodate?

The RS403 connects 400-336 kcmil conductors at End A to 4/0 AWG stranded conductors at End B.

Is the RS403 compatible with copper conductors?

Yes, the RS403 is dual-rated for both aluminum and copper conductors.

What dies are required for the RS403 splice?

The RS403 requires ABB B20AH dies for proper compression installation.

What is the physical size of the RS403 splice?

The RS403 has a compact 1-5/16-inch size, suitable for standard junction boxes.

Is the RS403 UL-listed?

Yes, the RS403 is a UL-listed compression splice for service entrance applications.

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