Appleton SR-503 Strain Relief Cord Connector 1/2 in

Product Description

The APPLETON SR-503 is a strain relief cord connector designed for use in electrical wiring applications where cord and cable must be secured at an enclosure entry point. With a 1/2 inch trade size fitting and a cord grip range of 0.2 to 0.3 inches, this connector provides mechanical protection by relieving tension on conductors at the point of entry into a junction box, panel, or enclosure. It is a standard component in commercial and industrial electrical installations and is typically installed by licensed electricians during device wiring or panel work.

This connector is suited for light-duty cord terminations where a 1/2 inch knockout is present and the cord outside diameter falls within the 0.2 to 0.3 inch range. Common applications include securing flexible cords to enclosures, control panels, and electrical boxes in both commercial and light industrial environments. Its compact form factor makes it appropriate for installations where panel space is limited.

Key Features

• 1/2 inch trade size fits standard 1/2 inch knockouts
• Cord grip range of 0.2 to 0.3 inches accommodates small-diameter flexible cords
• Provides mechanical strain relief to protect conductor terminations
• Compact and lightweight at 0.16 pounds for easy single-hand installation

Compatibility

Designed as an OEM-style strain relief fitting for use with standard 1/2 inch trade size knockouts found in electrical enclosures, junction boxes, and control panels.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize all circuits and verify lockout/tagout procedures before working inside any enclosure. Thread the connector through the knockout and tighten the locknut to secure the fitting before pulling cord through and cinching the grip to the appropriate cord diameter. Do not overtighten, as this may damage the cord jacket or insulation.

Technical Specifications

• Trade Size: 1/2 inch
• Cord Grip Range: 0.2 to 0.3 inches
• Package Dimensions (L x W x H): 5.4 x 5.1 x 0.13 inches
• Weight: 0.16 pounds
• UPC: 78312650725

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: SR-503