You can use a short pigtail to come off one screw and then any of a variety of splices to join the pigtail and two of the wires. Twist the wires together then twist on the wire nuts.
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Amazon Com Hubbell Raco 189hs Square Box With Pigtail And
How to split electrical wire into two. Make sure the j box you use has the appropriate entrance protection steel boxes require an insert to prevent shorting of the wires to the box plastic boxes typically have a built in wire retention device. A split outlet is a duplex electrical outlet that is split into two sections so that each section receives power from its own separate hot or powered wire. The cable sheathing should extend past the clamp into the box by 14 to 12 inch. Tighten the screws on the clamp until the cable is securely gripped. However a small section of the outlet is physically split to separate the functions. Use red electrical tape to mark the black wire on the red circuit at both ends.
The hot wire on the red circuit should be marked red. You can just join all the wires at the splice i do that when the receptacle is in a really awkward location. Splice wires whether youre swapping in a new light fixture or adding an outlet in the garage youll probably need to reconnect wires connect a new wire to an old one or extend a few wires. Another option is just to continue the split receptical setup for the two additional outlets. Make sure that the cable is positioned flat on the clampif you accidentally position it sideways you risk damage to the cable. Cut the sheathing to remove it and strip off about 34 inch of the plastic insulation from the end of each wire.
One remains on the other screw or not. Insert a clamp with wires attached into the junction box hole and from inside the box push the included nut over the wires and onto the clamp threads. The outlet body itself is not physically split. This splits the outlet so each half functions independently. Avoid nicking or scratching the copper wire while removing the insulation. Three wire cable runs from the switch to the outlet providing two hot wires to that location.
Insert one cable into each junction box knockout through the clamp. All you need to do is remove the fin on the hot side of the outlets to split them. Wiring a split switched outlet here a receptacle outlet is split by removing the connecting tab between the two hot terminals.