Twist-on wire connectors use a tapered metal insert and insulated cap to secure compatible conductors, while crimp-style connectors compress around the wires for a compact splice. Insulation-piercing connectors use internal teeth to contact conductors through the insulation, and gel-filled versions can help protect splices used in damp or outdoor residential installations.

Use sealed residential wire connectors when splices may encounter rain, soil, irrigation, condensation, or other moisture in outdoor, direct-burial, or damp-location wiring. Gel-filled or silicone-filled designs help create a weather-resistant connection, but confirm the connector’s wire-size range and location rating match the installation.

Many residential wire connectors, including B-type connectors, can join stripped or non-stripped wires when used within their specified wire range. A splice tool is helpful for direct-burial landscape-lighting connections because it supports consistent splicing with weatherproof, silicone-filled wire nuts.

Color-coded caps can help installers identify connector types and match them to the wire sizes and conductor combinations listed for the project. Connector capacity helps confirm that the splice fits the conductors, while package quantity supports planning for individual repairs, larger installations, and future service work.