All electric kitchen
Adding a 220-volt branch circuit to a kitchen load center (breaker box) is a relatively simple project. It does require some planning and obtaining an electrical wiring permit. It does require the ability to install wiring in such a fashion that it meets the requirements of both the national electric code and the local electric code. Your work will be inspected by the authority having jurisdiction before it's "green Ttgged." Don't bypass getting the permit and having the inspection, both are for your protection. The inspection assures that you have performed the work correctly and that it's safe, and the "green tag" is required to avoid problems with your home insurance carrier.
Instructions
1. Use the electronic stud finder to make sure that you won't be drilling and cutting into a wall stud and locate the device box 12 inches above the finished floor line.
2. Use the device box as a guide and outline the cutout on your wall with a carpenter's pencil or a fine point felt tip pen. Make a tight, neat cutout for the box to slip into.
3. Drill ½-inch holes in each corner of the cutout and then remove the cutout using the portable jigsaw.
4. Drill a ¾-inch hole through the sill plate at the base of the wall. The easiest way to accomplish this, if you have a basement or crawl space, is to drill up from below.
5. Drill another hole up through the sill plate beneath where the kitchen load center is located.
6. Feed the NMC up through the hole in the sill plate and through the hole you cut in the wall until it extends 12 inches into the room.
7. Route the NMC from the device box opening down into the basement or crawlspace, over and up to the top of the kitchen load center.
8. Insert the cable into the device box far enough for the cable to extend six to eight inches from the box. Insert the box into the wall and secure in place by turning the wing screws in a clockwise direction until the wings pull up against the inside of the wall finish.
9. Using the razor knife, carefully remove the outer jacket from the cable, leaving ¼ to 3/8 inches of the jacket intact where the cable enters the device box.
10. Using the wire strippers, remove ¾ inches of insulation from the ends of the red, black and white conductors.
11. Attach the stripped red and black wires to the "x" and "y" terminals on the back of the receptacle. Attach the white wire to the terminal marked "white" and the bare grounding wire to the terminal marked "GRND."
12. Secure the receptacle in the device box and install the cover plate.
13. Turn off the power to the load center at the main service panel and remove the load center cover.
14. Install the new two-pole circuit breaker in the load center.
15. Remove a ¾-inch knock out from the load center and install the ¾-inch cable clamp.
16. Insert the cable into the panel and remove its outer jacket.
17.Attach the red and black conductors to the two-pole circuit breaker.
18. Attach the white wire to the load centers neutral bar and the bare grounding wire to the load centers grounding bar. Keep the wiring tight and neat.
19. Replace the load center cover.
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