Thomas & Betts 8820 Threadless Conduit Coupling NSB

Description:

The Thomas & Betts 8820 Threadless Coupling NSB is used to join 3 inch rigid metal conduit (RMC) or intermediate metal conduit (IMC) while providing a secure mechanical connection and effective electrical bonding without requiring conduit threading. Commonly installed in industrial facilities, manufacturing plants, commercial buildings, utility systems, and electrical distribution installations, this threadless coupling simplifies conduit installation where conduit rotation is not possible. Maintenance teams and electrical contractors use this fitting for repair, retrofit, expansion, and replacement of rigid conduit systems. 

Applications:

The Thomas & Betts 8820 is designed to couple 3 inch rigid metal conduit and IMC in heavy-duty raceway systems. Its malleable iron construction provides a durable, concrete-tight connection, while the threadless design eliminates field threading and ensures dependable grounding continuity. The coupling is ideal for switchgear, motor control centers, industrial machinery, commercial electrical installations, and utility infrastructure where fast, secure conduit connections are required. 

Technical Specifications:

• Manufacturer Part Number (MPN): 8820
• Brand: Thomas & Betts (ABB) – T&B Rigid Fittings
• Product Type: Threadless Coupling
• Trade Size: 3 in.
• Conduit Type: Rigid Metal Conduit (RMC) / Intermediate Metal Conduit (IMC)
• Connection Type: Threadless Coupling
• Material: Malleable Iron
• Finish: Zinc Electroplated Chromate Coating
• Installation: Threadless
• Construction: Concrete-Tight
• Overall Length: 5-1/2 in.
• Outside Diameter: 4-11/16 in.
• Application: Couples and effectively bonds rigid metal conduit or IMC where conduit sections cannot be rotated
• Standards: UL Listed (UL File E23018), CSA Certified
• Compliance: RoHS Compliant, TSCA Section 6(h) Compliant
• UPC: 786210088204
• Features: Eliminates conduit threading, provides positive mechanical retention and electrical bonding, corrosion-resistant malleable iron construction, wrench-tight installation, and suitable for heavy-duty industrial and commercial conduit systems.

Common Replacements:

• Thomas & Betts 8720
• Thomas & Betts 8850
• Appleton TC-300