What’s more, push-in connectors are flourishing in the electrical aisle because they’re simpler and faster to use than their twist-on cousins. You strip the wire and push it into the connector.

You'll notice that not all electrical plugs are the same and might even have different inserts depending on the country. Here's how many there are.

Not long after I began contributing to Hagerty eight years ago, I wrote a detailed four-part piece on electrical relays and ...