![]() ![]() With over a century of history, this connector is now recognized everywhere, and it comes in many varieties. That is how the first pressure wire connector, branded “Marrette”, was created in 1914. With a desire to do things differently, he set to work in his home’s basement workshop to find an alternative to the then current connection method. The connection was then immersed in a molten solder bath, removed and allowed to cool, and then wrapped with insulating tape. Electricians first had to buff the conductors before twisting them together to make the connection. While working as an electrician on the conversion of residential gas lighting to electric lighting, he found that the method of connecting wires together was tedious and dangerous. Marr, a young Scotsman who had just arrived in Canada, had no idea that his ability to challenge the status quo would revolutionize the electrical industry. Use the connectors only in the location and application they’re designed for.At the turn of the 20th century, Bill P.Use the connectors only with the material, gauge and number of wires they’re intended for.Don’t exceed the voltage or amperage limit of the connectors.Don’t reuse damaged or single-use connectors.After installing a wire connector, pull on each of the wires a bit to make sure the connector is holding them securely.Make sure the wire ends are clean, undamaged and straight.Make sure the stripped portion of the wire is covered by the connector. Don’t strip away too much of the insulation.Note that stranded wire is slightly thicker than solid wire of the same gauge - many wire strippers have notches labeled accordingly for solid and stranded wire. Make sure you match the wire gauge to the correct notch on the tool. Use a wire stripper to remove the insulation from wires.Most wire connectors are easy to install, but always follow the manufacturer’s instructions for the wire connectors you’re using. Undamaged push-in connectors are typically reusable on solid wire with the same gauge or a larger gauge, but they aren’t reusable if they’ve held stranded wire - strands can become lodged in the connector and prevent a good connection if the device is used again. You can remove the connectors by pulling and twisting the wire back and forth until it disengages. ![]() They work for many copper wire connections where you would use twist-on connectors. Push-in connectors are best suited for solid wire but work with some low-strand-count stranded wire. If there are free ports on an existing connector, you can easily add to the connection without completely redoing it. Push-in connectors are available with different numbers of ports. Some of these devices have a clear housing that allows you to visually confirm the wires are fully inserted, and some also have a check port you can use to test the connection without removing the connector. They can reduce hand fatigue caused by the twisting motion required for standard connectors, which is especially helpful if you have many connections to make for a project. Push-in wire connectors aren’t as economical as twist-on or winged connectors but allow for very quick and easy connections simply by inserting the wires into the devices. If you’re working with aluminum wire, make sure the connector is specified for that application. Standard wire connectors are designed for use with copper wire only - don’t use them with aluminum wire. You also need to know the type of wire you’re working with.
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