First, you need to punch out the desired knockout hole on the electrical box. Once you have the connector attached securely to the end of the flexible electrical conduit, it is time to attach the connector to your electrical box. Step 4 - Snap Connector into Knockout Hole As the screw tightens, a metal band will tighten around the fitting and hold the connector firmly in place. You simply insert the connector until the conduit is firmly in place and then use a screwdriver to tighten the screw.

Most commonly they are threaded and will screw into the conduit, or often, they may have a squeeze connector that utilizes a screw to tighten onto a conduit line. These connectors attach to conduits in several ways. You will find that one end of your conduit connector is made to be inserted into your flexible electrical conduit. You must make sure you purchase the correct sized connector to connect your conduit to your electrical box. Like the conduit, they are most commonly 3/8 inch to ½ inch in diameter. Like the flexible electrical conduit, knockout holes can be one of a few standard sizes. Step 2 - Check the Knockout Hole SizeĪ knockout hole on an electrical box is a partially stamped opening in the electrical box that can be popped out to allow quick access for wires or quick attachment of a conduit connector. Just make sure that you choose the type and size of the conduit that you feel is correct for the job you are doing and make sure that you buy connectors that match. As mentioned before, you will have a variety of choices in the type and material of your conduit.

Most flexible electrical conduits come in either 3/8 inch or ½ inch in diameter, although they can be much bigger for industrial applications. Make sure when you purchase your connector that it is made appropriately to fit the size and type of conduit that you have. Flexible electrical conduits come in many sizes and varieties.

Flex type box connector