Engineered for dependable performance in indoor electrical installations, the Sigma Electric ProConnex 1 in. D Die-Cast Zinc Compression Coupling securely joins conduits and cables in dry locations. The die-cast zinc body delivers rugged durability, tight tolerances, and resistance to wear in everyday service, so your connections stay protected over time.
Part of the ProConnex family, this 1-inch compression coupling is designed to accommodate AC, MC, and FMC/RWFMC conduits, giving you a single, versatile fitting that reduces the number of parts you carry on the job. Its boxed packaging keeps a single unit readily available for quick replacements or retrofits.
Key features:
- Die-cast zinc body — robust, corrosion-resistant construction built for years of indoor use.
- 1 in. diameter fits standard 1 in. conduits and fittings, enabling straightforward integration with boxes, panels, and enclosures.
- Conduit compatibility: AC, MC, and FMC/RWFMC — ideal for mixed installations without swapping hardware.
- Safety listings: UL Listed and CSA Listed for compliance with electrical codes in North America.
- Application: Dry Location — intended for indoor environments such as equipment rooms, electrical closets, and service panels.
- Packaging: Boxed; 1 unit per package for easy stocking and on-site use.
Why installers choose ProConnex 1 in. Die-Cast Zinc Compression Coupling
Whether you're performing new construction, a retrofit, or a routine maintenance upgrade, this coupling delivers a reliable, code-compliant connection without the bulk of heavier hardware. The compression mechanism provides a secure seal that resists loosening from vibration or thermal cycling, helping prevent moisture ingress and ensuring long-term integrity inside dry locations.
Practical use cases
- Connecting 1 in. AC, MC, or FMC/RWFMC conductors to panels, junction boxes, or conduit bodies in indoor facilities.
- Retrofitting an aging setup where a compact, durable coupling is needed to replace worn fittings.
- New installations in electrical closets and mechanical rooms where space is at a premium and reliability matters.
Installation quick guide
- Prepare the conduits and inspect the end faces for damage or burrs.
- Slide the compression nut and ferrule onto the conduit, align with the mate fitting, and thread into place.
- Tighten to the manufacturer’s torque specification until a firm, leak-free seal is achieved.
- Inspect the connection for proper alignment and secure fit before energizing.
Built for professionals who demand durability, versatility, and straightforward maintenance, the Sigma Electric ProConnex 1 in. D Die-Cast Zinc Compression Coupling stands up to daily use in indoor, dry environments while keeping installations neat and compliant.
