# Wiring diagram review

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• 06-21-2010, 11:39 AM
DougLanglois
Wiring diagram review
I'm pretty comfortable with basic home wiring, but I'm embarking on a project that is more complex (or at least larger) than I've done before. I'm comfortable with each individual element, but I'd really like some knowledgeable opinions of the plan as a whole. Here is it -
[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs488.ash1/26679_399033191009_528751009_4887034_7248499_n.jpg[/IMG]

A lot of switches and a lot of lights, I know, but it's a very large room with several defined areas. For the electrics I've defined Front, Center and Back, and given each section a 4"x4" box. I'm not doing anything in the lighting boxes themselves because it's mostly recessed lighting. By moving it all to boxes I have the complicated stuff easily accessible from my workshop which is unfinished.

OK, be brutal - have I cracked it, or am I just plain cracked?
• 06-21-2010, 06:06 PM
DougLanglois
Re: Wiring diagram review
D'Oh! Of course.

So I know how comfortable to feel, are you an electrician, or a DIYer (with more experience than me, obviously)?
• 06-21-2010, 06:40 PM
DougLanglois
Re: Wiring diagram review
Can't argue with 30 years of experience! Excellent.

It's a 20A circuit, and although there are a lot of lights 90% are CFLs. I figured the numbers with both 14W CFLs and 60W incandescent (never know what someone will do in the future, I guess). Even with all incandescent the total power is < 1,500 Watts. As I understand it the max for a 20A circuit is 1,920W (80% * 20A * 120V). There is nothing else on the circuit.

Out of interest, what is the code violation? Is it the external light on the same circuit as internals? I was wondering about that.
• 06-21-2010, 10:59 PM
JLMCDANIEL
Re: Wiring diagram review
deadshort is spot on. The violation he mentions is because the re-designated white from 3-way one would be considered a return and code says you can't use a re-designated white as a return. You should use the re-designated white as the supply for 3-way one and the black as a traveler wire nutted to the to the re-designated white on 3-way two. In this case it makes very little sense but that's code.

Jack
• 06-22-2010, 11:32 AM
DougLanglois
Re: Wiring diagram review
Many thanks Deadshort, JLMCDANIEL. That leaves me with -

[IMG]http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs057.ash2/36223_399329021009_528751009_4895728_2907209_n.jpg[/IMG]
• 06-22-2010, 12:37 PM
JLMCDANIEL
Re: Wiring diagram review
One concern I have. You said this is going to be 20 amp circuits, which means 12 ga wire and you will need to use 2½" deep (not 1½" deep) 4X4 boxes so you don't exceed fill count.
Jack
• 06-22-2010, 01:13 PM
DougLanglois
Re: Wiring diagram review
Yep, NM-B 12/2 and 12/3, and 42 cu. in. boxes. Thanks for checking.

I'm having an electrician put in a new service panel (I have 2x200A Zinscos that need replacing) and I'll be having him install a new 20A breaker for this circuit. I'll probably ask him to check out my finished work at the same time. Can never be too careful.

I'm also going to have him install a few more circuits, since lots of the wiring is not up to code. The workshop has a 20A breaker, wired mostly with 12ga, but then 14ga going the last 5 feet to the panel :rolleyes:. The basement outlets are on 14ga going to a 20A breaker. There are outlets branched off the 'dedicated' washer circuit. The laundry shares power with God only knows what (not yet traced all the wiring). I've replaced a few undersized boxes, put in a box where there was none, and fixed one area where there was a box (with no lid), but it had been bypassed and splices done [i]next[/i] to it. I nearly had a heart attack when I took the old hanging ceiling down. I'm fixing it all myself, up to the panel. That's where I draw the line and call a pro.

If I meet the previous owner of this house I'll throttle him. I may not be a licensed electrician, but I know to check code and seek out pros when I'm not sure!
• 06-22-2010, 07:27 PM
DougLanglois
Re: Wiring diagram review
D'Oh, I meant Zinsco/Sylvania...
• 06-22-2010, 07:34 PM
djohns
Re: Wiring diagram review
Interesting last name . Actually very common here in South Louisiana . You wouldn't believe how non natives butcher it though .;)
• 06-22-2010, 07:39 PM
DougLanglois
Re: Wiring diagram review
[QUOTE=djohns;208532]Interesting last name . Actually very common here in South Louisiana . You wouldn't believe how non natives butcher it though .;)[/QUOTE]

Trust me I would, I really would.
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