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The installation of wire and/or electrical devices, to allow the transmission of electricity from one point to another.

313 votes
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What is the purpose of these holes on my wire stripper?

PLIERS Used as pliers. Stripper 80 - 22/20 Strip 22-20 AWG (.8 mm) wire. 1.0 - 18 Strip 18 AWG (1.0 mm) wire. 1.3 - 16 Strip 16 AWG (1.3 mm) wire. 1.6 - 14 Strip 14 AWG (1.6 mm) wire. 2.0 - 12 Strip …
Tester101's user avatar
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68 votes
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Can Romex (NM-B) cable be run through conduit?

National Electrical Code 2011 ARTICLE 300 Wiring Methods I. General Requirements 300.5 Underground Installations. (B) Wet Locations. …
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36 votes
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How do I properly feed coax through an outside wall?

I'd drill from the inside out. Preparation inside Cut a hole in the drywall where you want the terminal. Cut the hole so that a "low voltage" bracket will fit. Drilling the hole If it's a 2×4 stud wa …
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  • 132k
34 votes
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Is it ok to have mixed grounds and neutrals on bars in a breaker box?

A premises wiring system supplied by a grounded ac service shall have a grounding electrode conductor connected to the grounded service conductor, at each service, in accordance with 250.24(A)(1) through …
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30 votes

How can I locate a wall from a crawl space?

Cut an opening in the wall for a low voltage box/bracket,and install the bracket. Position a flexible drill bit into the hole, so that you'll drill straight through the bottom plate of the wall …
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28 votes

What is the proper 'per code' method for running nonmetallic sheathed cable above a ceiling ...

National Electrical Code Chapter 3 Wiring Methods and Materials Article 334 Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS 334.23 In Accessible Attics. … National Electrical Code 2014 Chapter 3 Wiring Methods and Materials Article 300 Wiring Methods 300.4 Protection Against Physical Damage. …
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  • 132k
26 votes

What wire gauge do I need for a 100 Amp subpanel at the end of a 60' wire run?

National Electrical Code 2014 ARTICLE 310 Conductors for General Wiring 310.15 Ampacities for Conductors Rated 0–2000 Volts. (B) Tables. …
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26 votes

Why don't you connect unused hot and neutral wires to "complete the circuit"?

To get more accurate result, we'll include the resistance of all the wiring in the circuit. For all the examples, we'll assume 200' of 12 AWG copper wire is used (0.00193 ohms/ft). … The circuit breaker reacts to the high current, and opens the circuit before the wiring can be damaged. …
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18 votes
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Is there any code for running Ethernet cable (through attics)?

Chapter 3 Wiring Methods and Materials Article 300 Wiring Methods I. General Requirements 300.4 Protection Against Physical Damage. … In both exposed and concealed locations, where a cable- or raceway-type wiring method is installed parallel to framing members, such as joists, rafters, or studs, or is installed parallel to furring strips …
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17 votes

What is the right way to strip power wires?

This is one of those things that I think just takes practice, the more you do it the better you'll get at it. I've seen lots of different techniques, but even after being shown these tricks you would …
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  • 132k
17 votes
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What is this cable hanging against the outer wall?

Looks like Landscape wire. It's low voltage cable (150 volts), so there's likely a transformer and/or control box at the other end. Though the previous owners may have taken all the landscape light …
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16 votes
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Where does the ground wire go in a 3-prong dryer cord configuration?

The installation guide for the dryer will have wiring instructions for both 3, and 4 wire configurations. … Check the manufacturers documentation for proper wiring, but I would say the first image is likely correct. …
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14 votes
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What do I do with the unused wire for ceiling fan installation?

The original wiring looked something like this... The wiring with the remote unit looks something like this... … As you can see in the new wiring, the remote unit controls the current to the fan and light. Because of this, the second switched ungrounded (hot) conductor is not required. …
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13 votes
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Running cat 6 networking cable in the attic: what is up to code?

Since you are in a one-family dwelling, there is really only one important article to be aware of. 800.26 Spread of Fire or Products of Combustion. Installations of communications cables and commu …
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13 votes
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How to properly wire a ceiling light fixture?

The power (from the breaker) is likely at the light fixture. When you hook black to black and white to white, the light is powered directly from the breaker. In this configuration, when you flip the …
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