10/4 SRDT ROUND 4 30AMP 14-30

A 1-1/4" NM SW cable connector is a non-metallic sheathed cable (Romex) connector used to secure NM cable into a box or enclosure with a 1-1/4" knockout.

Product Description

• Type: NM (non-metallic sheathed cable) connector
• Trade Size: 1-1/4 inch knockout
• Cable Type: NM-B (Romex)
• Material: Typically zinc die-cast or plastic (depends on model)
• Function: Secures cable to electrical box and prevents pullout or abrasion
• Mounting: Locks into knockout with locknut or snap-in design

Key Features

• Designed specifically for NM cable strain relief
• Internal clamp or saddle grips cable jacket
• Protects cable from sharp box edges
• Helps meet NEC cable support and securing requirements

Common Uses

• Residential electrical wiring (Romex installations)
• Junction boxes, device boxes, and panel terminations
• Branch circuit wiring runs in walls and ceilings
• Any application where NM cable enters a metal or plastic box

Key Idea

This fitting is a strain-relief connector—its job is to hold NM cable securely in the box while protecting it from damage, not to ground or support conduit.

Breakdown of the name

• 1-1/4" = knockout size it fits
• NM = non-metallic sheathed cable
• SW = commonly used shorthand in catalogs (often “screw-type” or manufacturer-specific designation for the connector style)