ABB - Installation Products 681AL - 2-1/2 Inch Erickson Coupling, Aluminum, for Use with Rigid/IMC Conduit
ABB - Installation Products

681AL

UPC: 786210801582

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Overview

The ABB 681AL 2-1/2 inch Erickson coupling is a copper-free aluminum conduit fitting designed for secure, vibration-resistant connections between rigid metal conduit (RMC) and intermediate metal conduit (IMC). Engineered for applications where conduit rotation is impractical, this coupling enables rigid in-line coupling without requiring either conduit length to turn. Its free-fitting threads ensure easy assembly while maintaining a concrete-tight seal that prevents dust and moisture ingress. The aluminum construction provides inherent corrosion resistance and lightweight durability, making it ideal for harsh environments. Capable of carrying ground fault currents up to 20,000 amps RMS (duration of three cycles), the 681AL meets UL 514B, CSA C22.2 No. 18, and NEMA FB1 standards. Suitable for direct burial and concrete-tight installations, this coupling is a reliable solution for electrical systems requiring continuous grounding and structural integrity. The 2-1/2 inch size accommodates standard NPS threaded conduit connections.
  • 2-1/2 inch size for standard NPS threaded conduit
  • Copper-free aluminum construction for corrosion resistance
  • Concrete-tight seal prevents dust and moisture ingress
  • Carries ground fault currents up to 20,000 amps RMS
  • Facilitates reliable electrical grounding

Specifications

Application
To Couple and Effectively Bond Threaded Ends of Rigid Metal Conduit/Intermediate Conduit Where Neither Length of Conduit Can Be Roated
Material Quality
Aluminum
Standard
UL E23018, CSA
Trade Size
2-1/2 in
Type
Erickson Couplings
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)
1.1200 L
Package Weight (Metric)
0.5080 kg
PVC Coated Conduit Coupling, 2-1/2 Inch/63 Metric Coupling Size, 2.88 Inch/73.10 Millimeters Minimum Length of Metal, 6.88 Inch/174.70 Millimeters Total Minimum Length Including Sleeve, Straight Threads, Pressure Sealing Sleeves, Blue Urethane Coating on Interior and Threads, Galvanized Rigid Steel, Yellow

CPL21/2-Y

PVC Coated Conduit Coupling, 2-1/2 Inch/63 Metric Coupling Size, 2.88 Inch/73.10 Millimeters Minimum Length of Metal, 6.88 Inch/174.70 Millimeters Total Minimum Length Including Sleeve, Straight Threads, Pressure Sealing Sleeves, Blue Urethane Coating on Interior and Threads, Galvanized Rigid Steel, Yellow
4 Inch Erickson Coupling, Malleable Iron with Steel and Malleable Iron Ring for Use with Rigid/IMC Conduit

684

4 Inch Erickson Coupling, Malleable Iron with Steel and Malleable Iron Ring for Use with Rigid/IMC Conduit
5 Inch Erickson Coupling, Malleable Iron with Steel and Malleable Iron Ring for Use with Rigid/IMC Conduit

686

5 Inch Erickson Coupling, Malleable Iron with Steel and Malleable Iron Ring for Use with Rigid/IMC Conduit
6 Inch Erickson Coupling, Malleable Iron with Steel and Malleable Iron Ring for Use with Rigid/IMC Conduit

687

6 Inch Erickson Coupling, Malleable Iron with Steel and Malleable Iron Ring for Use with Rigid/IMC Conduit
3-1/2 Inch Erickson Coupling, Aluminum, for Use with Rigid/IMC Conduit

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3-1/2 Inch Erickson Coupling, Aluminum, for Use with Rigid/IMC Conduit
6 Inch Erickson Coupling, Aluminum, for Use with Rigid/IMC Conduit

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6 Inch Erickson Coupling, Aluminum, for Use with Rigid/IMC Conduit
2-1/2 Inch Set Screw Coupling Malleable Iron for Use with Rigid/IMC Conduit

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2-1/2 Inch Set Screw Coupling Malleable Iron for Use with Rigid/IMC Conduit
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Frequently Asked Questions

Does the 681AL require conduit rotation for installation?

No, the coupling's free-fitting threads allow installation without rotating either conduit length.

What conduit types are compatible with the 681AL?

The 681AL is designed for rigid metal conduit (RMC) and intermediate metal conduit (IMC) with 2-1/2 inch NPS threaded ends.

What standards does the 681AL meet?

The 681AL complies with UL 514B, CSA C22.2 No. 18, and NEMA FB1 standards for conduit fittings.

What is the maximum ground fault current rating?

The 681AL can carry ground fault currents up to 20,000 amps RMS for a duration of three cycles.

Is the 681AL coupling suitable for direct burial?

Yes, the coupling is approved for direct burial applications due to its concrete-tight seal and durable aluminum construction.

Can the 681AL coupling be used in wet environments?

Yes, the coupling provides a concrete-tight seal that prevents moisture ingress, making it suitable for wet or outdoor applications.

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What environmental ratings do Thomas and Betts products have?

Thomas and Betts products feature robust environmental ratings, including NEMA Type 1, 2, 3, 4, 4X, 12, and 13 certifications, as well as IEC 60529 IP66 protection. These ratings ensure that their products are designed to withstand harsh industrial environments, with capabilities to resist dust, water, and corrosion, and operate effectively in a wide temperature range.

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