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Electrical Wiring FAQ (Part 1 of 2)

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Updated: WARNING

This FAQ has not been updated or posted in a number of years.  It
is intended that it will be updated to bring it more into compliance
with current code.  Comments welcome at wirefaq(@)ferret.ocunix.on.ca

	    Frequently Asked Questions on Electrical Wiring

                        Copyright 1991-2004
		Steven Bellovin (smb(at)research.att.com)
		Chris Lewis (clewis(at)ferret.ocunix.on.ca)

		Redistribution for profit, or in altered content/format
		prohibited without permission of the authors.
		Redistribution via printed book or CDROM expressly
		prohibited without consent of the author.  Any other
		redistribution must include this copyright notice and
		attribution.

	    Comments to: wirefaq@ferret.ocunix.on.ca

The latest FAQ can always be obtained from:

    http://www.landfield.com/faqs/electrical-wiring
    ftp://rtfm.mit.edu/pub/usenet/news.answers/electrical-wiring/part1
    ftp://rtfm.mit.edu/pub/usenet/news.answers/electrical-wiring/part2

This FAQ is formatted as a digest.  Most news readers can skip from one
question to the next by pressing ^G.

Answers to many other topics related to houses can be obtained from the
misc.consumers.house archive; send an empty piece of mail to
house-archive@dg-rtp.dg.com for information.

Changes to previous issue marked with "|" in left column.  Watch
particularly for "NEW" in the Questions list for new or substantively
changed answers.  "g^|" will get you to the changed sections quickly in
most newsreaders.

User Contributions:

1
Dev
⚠
In a fire protection circuit, circuts are shown witha no example 6,8,4etc. what it mean?these circuits are connected between smode detector,junction box etc
2
kevin
⚠
My daughter dropped a small necklace behind her dresser. The necklace crossed a plug terminal and shorted the receptacle.
I bought a new receptacle and installed the same. I still have no power I suspect there could be a bigger problem,this is aluminum wiring.
I've killed the breaker and call an electrician but am curious as to what happened.P.s. there is a dimmer switch on the same circuit.
3
dennis
⚠
Regarding new construction wiring and running 12/2 and 14/3 wire in the same box.

I have multiple switches to lights. Ran 12/2 and 14/3 into switch box and inspector wrote correction needed.

What should I have done instead?

thank you
dennis
4
Robert
⚠
Does a grounding electrode facilitate the operation of a OCPD, to clear a ground fault ?
5
@dennis
⚠
Assuming you are installing two switches in a two switch box, you probably should have used 14/2 and 14/3 instead of replacing 14/2 with 12/2. If you are only installing one switch in a one switch box, you should only have one cable in the box.
6
P k
⚠
I prefer to use nothing smaller than12 awg /the smallest sized wire on a circuit determines the allowable ampacity
Ex: 15 amp-14awg. 12awg-20amp only rule for thumb other factors such as continuous load,heating and others if you do not know the safe NEC rules then please call a qualified journeyman Electrician better be safe

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Last Update March 27 2014 @ 02:11 PM