Glory Adding Outdoor Light To Existing Circuit
Apply a thick bead of silicone caulk or exterior sealant along the perimeter on the back side of the box.
Adding outdoor light to existing circuit. Assemble your new light fixture following the manufacturer s directions. At the first new light the wires are spliced to the new cable running to the next light and to a pigtail to connect the first new light. Adding a light to a circuit an end of run fixture is one that goes after the existing fixture in the circuit.
Connect the white wire from the light fixture to the white wire from the new ceiling junction box by twisting an orange wire connector to both wires. Mount the box to the wall with exterior screws. You must undo the connections and add the 2 lights.
Turn on all the light fixtures that are on this circuit. Repeat the connection for the black wire from the junction box and the black wire from the fixture. Add the additional proposed load of the new light fixtures to the existing load and determine the load percentage.
Remove one of the knockouts on the back of the outdoor electrical box. Measure the existing load of the circuit using a clamp on amperage meter. There is a single switch operating a ceiling light in the garage would it be ok to change the single switch to a double switch to connect the outside light or is there a better way of doing that.
Add the 2 new neutrals to the existing neutral bundle add the 2 new hot wires to the red bundle red from switch with pigtail to light should be what is there currently. To calculate the percentage of circuit load take the total load and divide by the circuit rating. 10 amps load 15 amp circuit rating a 66 load.
Finish the connection to the circuit by connecting the bare copper wire from the junction box to the green wire from the fixture with another orange wire connector. Make sure the cable you use is the same gauge as the one powering the existing fixture. Choose a place for the fixture install an electrical box and run a cable between the new fixture and the existing one.