Slide large wires in and tighten the hex nut for a strong, secure hold between the wire and screw. Loosen the hex to make a quick adjustment or to reuse the splice elsewhere. These splices are easy to use, but the connection isn't fully protected by the body of the splice.

End caps seal off the wire to keep your connection completely dry and conductive. Set screws cinch the wire without denting the body, so you can pop splices on and off for adjustments and reuse. For cable, attach each wire to its own set screw.

Plugged and sealed at every opening, these tap/connectors protect wire from groundwater and rocky soil. The trim-to-size port plugs create a tight seal where the wire enters. The other plugs have double O-rings to seal off gaps around the set screws.

Lay the main wire into your tap on the first try instead of poking and threading. The tap wire connects parallel to the tap or at 90°, so the tap will slide into your setup at different angles. Strip both wires and slide off the screw plate before installation. Tighten the set screws onto both wires for a secure connection.

Covers—These covers fully insulate the tap so moisture can't reach the wire. They snap shut so you don't have to tape them down.

These connectors hold wire more securely than crimp-on connectors, so they're a better choice for high-vibration setups. They're also quicker to install and reusable because you don't crush them with a crimping tool. Tighten the set screw into the metal barrel inside the connector for a secure grip on the wire.