Wiring Exterior Garage Lights Electrical Garage Wiring for Lights and a Switch Carl, yes the 12 gauge wire is good for 20 amps and matching the existing wire size is the right thing to do. Typically the addition of 3 more lights should not be an amount of load that wold be a problem, however testing the circuit would reveal this to be sure.
Wiring Exterior Garage Lights An easy-to-install exterior motion light adds safety, security and convenience to any home. Skip to main content Skip to main navigation. If the wiring colors don't match—a common problem in older homes—you can use the voltage meter to identify the positive, negative and ground wires
Wiring Exterior Garage Lights UF (underground feed) electrical cable. ¾-inch-diameter plastic conduit, used to house cable ¾-inch conduit outlet bodies, boxes, and assorted fittings. Exterior-grade acrylic-latex caulk, used to weather-seal conduit outlet boxes Sand and red caution tape, used to warn of the buried cable 1⅝-inch galvanized or stainless-steel screws, for attaching conduit outlet boxes
Wiring Exterior Garage Lights One lighting outlet is required on the exterior side of all exterior doors at grade level (first-floor doors). This does not include garage doors used for vehicle access. A lighting outlet is required at all garage egress doors. Transformers on low-voltage lighting systems must remain accessible.