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Switch Won't Turn Off

 
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Old 08-27-2014, 12:02 PM   #41
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Re: Switch Won't Turn Off


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Originally Posted by jb4211 View Post
It's funny you said that. That panel in the picture was done by someone from Canada: the previous HO. To be honest, in my 25 yrs, I've never come across a shared neutral until now.

Amatuer or not, I don't like it
What's not to like?
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Old 08-27-2014, 01:51 PM   #42
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Re: Switch Won't Turn Off


I'm not an engineer, but if you have two 12gauge hot leads, hit can you have only one 12 gauge neutral?
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Old 08-27-2014, 02:55 PM   #43
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Re: Switch Won't Turn Off


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I'm not an engineer, but if you have two 12gauge hot leads, hit can you have only one 12 gauge neutral?
If they are on a different end of the phase yes you can.
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Old 08-27-2014, 04:34 PM   #44
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Re: Switch Won't Turn Off


Neutrals carry over current. A properly balanced 110 volt system will run without a neutral.

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Old 08-27-2014, 06:27 PM   #45
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Re: Switch Won't Turn Off


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Until 2011 tying the breakers together was not required. If the AHJ has not adopted the 2011 NEC, it still would not be required. Tom
It is required in the 2008 nec that multi wire branch circuits must have simultaneous disconnect for ungrounded conductors. I think you mean 2005. Are there still any areas that still go by the 2005?
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Old 08-27-2014, 06:47 PM   #46
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Re: Switch Won't Turn Off


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It is required in the 2008 nec that multi wire branch circuits must have simultaneous disconnect for ungrounded conductors. I think you mean 2005. Are there still any areas that still go by the 2005?
You're correct, 08. I know it was proposed for it, did not realize it made it in.

Could be, one of the local AHJ websites still list the '99 NEC as the adopted code. For some reason it gets missed in the website updates.

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Old 08-27-2014, 11:04 PM   #47
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Re: Switch Won't Turn Off


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My first question as well. Did this by chance get changed too? If so, there is a small tab that needs to be taken out.
Yep spit wired recepticle ......didn't they change the code on those?
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Old 08-27-2014, 11:08 PM   #48
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Re: Switch Won't Turn Off


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I live in the county and most of my work is done outside of city jurisdictions. A good bit of the work I run across was installed or repaired by someone other than an electrician. First rule I learned when I moved here was to never assume anything was wired correctly.

I understand you were talking about the neutral load getting you in trouble, but I have seen jobs out here where all the white wires were connected to breakers and the blacks to the neutral buss

But hey - the lights came on so it must have been right
yeah I've seen it too.....then they wonder why they end up with reverse polarity
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Old 08-27-2014, 11:20 PM   #49
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Re: Switch Won't Turn Off


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Saves money, less work less wire. On a big job it can really help your bottom line.

I think not taking advantage of shared neutrals is amateurish.
I agree Inner10. To those who disagree you will find when fishing home runs from lets say a basement to an attic for new circuits 3 wire will be more cost and time effective. Especially if your charging by the box instead of T/M. You may not always have the room for multiple runs either. If sharing a neutral bothers that much have you requested your POCO to run an extra neutral off the transformer?
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Old 08-28-2014, 03:26 AM   #50
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Re: Switch Won't Turn Off


In this particular case, it was done to save money on materials. It was the installers own home and room to run the wires was not an issue.

But he failed to tie the two breakers together leaving the neutral energized when the HO shut down half the circuit, thinking he shut down the whole circuit.

That was one issue. There were several including having 12/3 being fed by 20a breakers, then stepping down to 14/2 in a junction box.
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Old 08-28-2014, 04:20 AM   #51
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Re: Switch Won't Turn Off


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Saves money, less work less wire. On a big job it can really help your bottom line.

I think not taking advantage of shared neutrals is amateurish.
think before you bid
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Old 08-28-2014, 05:04 PM   #52
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Re: Switch Won't Turn Off


It works! Thanks for the help! http://youtu.be/YtKk97G5Q3I

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