Not every cord component fits neatly into a connector family. This page covers the useful miscellany — the adapters, grips, in-line devices and specialized cord constructions that complete a real-world power system. Small parts, but each solves a specific problem.
Adapters and Cube Taps
A plug adapter converts one configuration to another — for example, a grounding adapter that lets a three-prong 5-15P plug into a legacy two-slot 1-15R outlet while providing a tab to bond the ground to the cover-plate screw. Cube taps and multi-outlet adapters split one receptacle into several. Adapters must never be used to defeat polarization or grounding, and their combined load must stay within the outlet's rating.
Cord Grips and Bushings
Where a cord passes into an enclosure, a cord grip (also called a cable gland or strain-relief bushing) clamps the jacket, seals the opening and provides mechanical strain relief. Liquid-tight versions carry an IP rating and are essential for outdoor and washdown equipment. Selecting a grip is a matter of matching the cable diameter, the mounting thread and the environmental seal.
In-Line Connectors and Switches
In-line components let a cord do more than carry power. In-line rocker switches, feed-through connectors, fuse holders and indicator lamps are spliced into a cord run to add control or protection close to the load. Each must match the cord's voltage and current rating and provide its own conductor retention.
Coiled and Retractable Cords
Coiled cords — the springy, telephone-handset-style construction — retract to a fraction of their extended length, keeping slack off the floor on tools, test equipment and trailer connections. They are made by winding a straight cord around a mandrel and heat-setting the jacket into a permanent helix. Retractable reels achieve the same tidiness mechanically. Both trade a little conductor resistance and flex complexity for a large gain in convenience and safety.
Choosing the Right Accessory
The rule for every accessory is the same: it must not become the weakest link. Match its ratings to the cord and connectors around it, confirm it carries the appropriate safety listing, and make sure it does not compromise the grounding or polarization of the assembly. For general guidance on safe use of cords and accessories, the Electrical Safety Foundation International maintains accessible references.