When should I use compression vs set-screw EMT connectors?

Set-screw connectors install faster and work in dry indoor locations. Compression connectors are required for wet, damp, or outdoor locations per NEC 358.42. Compression provides concrete-tight and rain-tight connections.

What size EMT connector do I need?

Match the connector trade size to your EMT conduit trade size. Common sizes are 1/2 inch, 3/4 inch, 1 inch, 1-1/4 inch, and 2 inch. The connector attaches EMT to electrical boxes via a knockout.

Are your EMT fittings UL listed?

Yes. All Conversions Tech EMT connectors, couplings, and fittings carry UL listing and meet NEC requirements for conduit installations in residential, commercial, and industrial applications.

EMT Fittings | Conversions Tech

EMT fittings by the box, stocked and cross referenced. Connectors, couplings, locknuts, bushings, grounding bushings, straps and hangers for 1/2" through 4" EMT, plus rigid threaded and threadless couplings and conduit bodies. Steel and zinc die-cast, UL 514B, concrete-tight and raintight where marked. Cross-referenced to RACO, Bridgeport, Arlington, Appleton, and O-Z/Gedney on every product page. Same-day shipping on in-stock items; Net-30 for approved trade accounts.

Start with the raceway and the location. Indoor dry/damp: set-screw (fastest) or compression. Concrete pours: concrete-tight compression or set-screw so marked. Outdoor, rooftops, wash-down: raintight compression — NEC 358.42 requires wet-location-listed fittings there. Conductors 4 AWG and larger need an insulated throat or bushing (300.4(G)); service equipment and concentric knockouts over 250 V need grounding bushings with bonding jumpers (250.92, 250.97). Support within 3 ft of every box and every 10 ft (358.30).