Southwire 520 4-in 1-hole Emt Rgd Conduit Strap

Product Description

The SOUTHWIRE 520 is a 4-inch, 1-hole conduit strap designed for securing EMT (electrical metallic tubing) and rigid conduit to structural surfaces. This type of fitting is a standard fastening hardware item used in commercial and residential electrical rough-in work. It holds conduit runs firmly against walls, ceilings, and framing members, maintaining proper support intervals as required by NEC guidelines. Electricians reach for single-hole straps like this one when routing conduit along flat surfaces where a single fastener point provides sufficient hold. The 4-inch size makes it suitable for larger conduit installations commonly found in industrial panels, service entrance work, and heavy branch circuit routing.

This strap is applicable in a wide range of electrical installation scenarios, including commercial buildouts, industrial facilities, and residential service work. It is used wherever 4-inch EMT or rigid metallic conduit requires wall or surface support along a run. Electricians and electrical contractors install these straps during conduit rough-in, typically at support intervals specified by the NEC. The 1-hole mounting design speeds installation when working against flat concrete, masonry, or wood framing surfaces.

Key Features

• Fits 4-inch EMT and rigid metallic conduit
• 1-hole mounting design for fast single-fastener installation
• Compatible with surface mounting on wood, masonry, and metal framing
• Supports NEC-compliant conduit spacing and support requirements

Compatibility

Designed as an OEM-style replacement and standard-fit strap for 4-inch EMT and rigid conduit systems in commercial and residential electrical installations.

Installation Notes

Installation is performed by licensed electricians in accordance with NEC Article 358 (EMT) or Article 344 (rigid metal conduit) support requirements. De-energize all circuits in the work area before securing conduit straps near energized conductors. Use appropriate fasteners for the mounting surface type, such as concrete anchors for masonry or wood screws for framing. Do not overtighten the mounting fastener in a way that deforms the strap or stresses the conduit wall.

Technical Specifications

• Conduit Size: 4 inches
• Mounting Holes: 1-hole
• Compatible Conduit Type: EMT, Rigid (RGD)
• Package Weight: 17 pounds
• UPC: 75133815700

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 520