Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring The viewer is expressly advised to consider and use all safety precautions described in this presentation or that might also be indicated by undertaking the activities described herein. In addition, common sense should be exercised to help avoid all potential hazards. Publisher assumes no responsibility for the activities of the viewer or for the subject matter experts who prepared this presentation. Publisher makes no representation or warranties of any kind, including but not limited to, the warranties of fitness for particular purpose or merchantability, nor for any implied warranties related thereto, or otherwise. Publisher will not be liable for damages of any type, including any consequential, special or exemplary damages resulting, in whole or in part, from viewer's use or reliance upon the information, instructions, warnings or other matter contained in this presentation. Safety Notice

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Observe safety rules. Make sure tools and equipment are available. Check materials. Follow the steps described here.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Safety Wear safety glasses at all times. Follow all safety rules for using hand tools. Follow all safety rules for using power tools. Follow all safety rules for working with electricity.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Tools and Equipment  Tape measure  Drill  Linesperson’s pliers  Multi-purpose electrician’s pliers  Cable ripper  Wire stripper  Circuit tester  Utility knife  Cable clamp  Stapler

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Materials  NM cable  Electrical boxes  Circuit breaker panel  Locknuts  Wire nuts

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Procedure The steps that follow describe how to rough- in electrical wiring.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 1 Check the electrical plan to determine where the electrical boxes should be placed. a.A standard receptacle is usually centered 12" above floor level.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 1 b.There are three sizes of single-gang boxes: 18, 20.4, and 22.5 cubic inches. c.If you are not sure which size to use, always use the largest one.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 2 a.Position each box on the stud so that the front of the box will be flush with the finished wall. b.Nail the box in place.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 3 a.Open a knockout hole in the box for each cable that will enter it. b.Break off any sharp pieces and smooth the hole so that the sheathing on the cable will not be damaged as the wire is pulled through it.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 4 a.Install the switch boxes so the center of the box is 48" from the floor. b.If the switch is located next to a door, be sure to allow space for the door trim.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 4 c.If the box has to be placed between studs, add a horizontal block between the studs and mount the box on it.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 4 d.Position the box so that its face will be flush with the finished wall.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 5 a.For a ceiling light, attach the electrical box to an adjustable brace bar between joists.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 5 b.Nail the ends of the bar to the ceiling joists.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 5 c.Position the box so that it will be flush with the finished ceiling.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 6 a.Drill 5 / 8 " to 3 / 4 " holes for the cable in the middle of the studs approximately 20" from the floor.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 6 b.The holes must be a minimum of 1 1 / 4 " back from each edge of the stud. The job will be easier if you use a right- angled drill.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 6 c.Be sure the holes are straight and not angled. They should also be smooth and free of splinters.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 7 Straighten the cable before pulling it through to avoid kinks. Kinks will make it more difficult.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 8 a.Before pulling the cable into the circuit breaker panel, insert a cable clamp into the knockout hole.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 8 b.Secure it with a locknut. c.Leave 1 / 4 " of the sheathing on the cable that extends into the panel.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 8 d.Tighten the clamp to secure the cable. e.Anchor the cable to the stud within 12" of the panel with a cable staple.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 9 a.Staple the cable to the framing members every 4´. b.As you come to an electrical box, pull the cable in front of the box. c.Make a mark on the cable 1 / 2 " past the point where it will enter the box.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 9 d.From the point where the cable leaves the box, measure another 8" and cut the cable. It is better for the cable to be too long than too short. You can always cut more off later.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 9 e.Strip the cable from the mark to the end and thread it through the knockout hole. f.Secure the cable in place with a staple 8" from the box.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 10 With linesperson’s pliers, clip back each wire so that 8” extends past the front of the box.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 11 a.Strip 3 / 4 " of the insulation from the end of each wire. b.Be careful not to nick the wire. c.Be sure to use the appropriate slot for the gauge you are working with.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 12 a.Add another cable to the box if the plans call for it. b.Staple the cable 8" from the box.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 12 c.Allow a little slack as the cable turns to go through the holes in studs, so that the angle is not sharp.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 13 a.Where a fixture will be installed, staple the cable to a stud near the fixture location. b.Leave plenty of extra cable.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 13 c.Mark the location on the floor so you can find it after the walls are finished. Some contractors take a photo of the unfinished wall to create a record of where everything is located.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 14 a.Using wire nuts, tie together the ground wires in each electrical box. b.If there are clamps in the box, tighten them.

Copyright © Glencoe/McGraw-Hill Carpentry & Building Construction Roughing-In Electrical Wiring Step 15 Label the wires entering each electrical box.