Nsi Industries 280-DC Emt to Flex Conduit Coupling

Product Description

The NSI INDUSTRIES 280-DC is a combination coupling designed to connect 1/2 inch EMT conduit to 3/8 inch flexible conduit in a single fitting. This type of coupling eliminates the need for separate connectors at each conduit transition, reducing parts count and labor time at the junction point. It is a standard electrical raceway fitting used in commercial and residential wiring installations where rigid EMT transitions to flexible conduit for equipment connections, motor terminations, or panel knockouts. Licensed electricians and electrical contractors install this fitting as part of conduit raceway systems governed by the National Electrical Code.

This coupling is suited for transition points in branch circuit and feeder conduit runs where flexibility is needed at the termination end. Typical applications include HVAC equipment connections, motor-driven loads, and any installation where vibration isolation or equipment movement requires a flexible conduit section bridging from a rigid EMT run. The 1/2 inch EMT to 3/8 inch flex sizing covers one of the most common conduit transition combinations encountered in light commercial and residential electrical work.

Key Features

• Combines 1/2 inch EMT and 3/8 inch flexible conduit in a single coupling body
• Eliminates the need for two separate conduit connectors at the transition point
• Suitable for use in standard electrical raceway installations per NEC guidelines
• Compact fitting design suited for tight junction box and enclosure entries

Compatibility

Designed as a standard combination coupling for use with 1/2 inch EMT conduit and 3/8 inch flexible metallic or flexible nonmetallic conduit in typical electrical raceway installations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements and local codes. De-energize the circuit and verify zero voltage before making any conduit or wiring connections. Ensure the EMT end seats fully into the coupling and the setscrew or compression mechanism is secured before pulling wire. Do not overtighten fittings on flexible conduit to avoid restricting the flex section or damaging the conduit jacket.

Technical Specifications

• EMT Size: 1/2 inch
• Flexible Conduit Size: 3/8 inch
• UPC: 78174709280

Standard Information

• Brand: NSI INDUSTRIES
• Manufacturer Part Number: 280-DC