What is "14/2/2 double neutral" and what is it used for?

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busman said:
I think it could also be used for 3-way switching where the new code rule requires the neutral be brought to the switch. It would be 1 Hot, 2 Travelers and 1 Neutral.

Mark
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You can wire 3-ways through a chain of multiple lights with it - travelers and neutral going, switch leg coming back
 
Fred B said:
That could be accomplished via a 14/3 also.
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Yes. I'm not fully seeing the use for X/2/2. It's more than twice the price of X/2. I've never actually seen it in the wild, even in new construction.

To comply with code, there only needs to be a neutral in ONE switch location. Just supply the power from there and run X/3 around.
 
VirutalElectrician said:
Yes. I'm not fully seeing the use for X/2/2. It's more than twice the price of X/2. I've never actually seen it in the wild, even in new construction.

To comply with code, there only needs to be a neutral in ONE switch location. Just supply the power from there and run X/3 around.
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X/2/2 not necessary for switch locations perse X/3 would suffice, but with the residential use of AFCI breakers mandatory in most applications, MWBC not functionally useful with most AFCI on market forcing the EC to install individual runs of X/2 for each branch circuit. X/2/2 allows for a single pull to give 2 branch circuits with one pull. Cost/Benefit ratio might not always be there depending on complexity of the pull. I have used the X/2/2 for that reason when blind pulls between levels or spaces would become to complicated or intrusive to run multiple single pulls.
 
VirutalElectrician said:
Yes. I'm not fully seeing the use for X/2/2. It's more than twice the price of X/2. I've never actually seen it in the wild, even in new construction.

To comply with code, there only needs to be a neutral in ONE switch location. Just supply the power from there and run X/3 around.
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I'm not seeing that in the 2017 code. Has something changed?

Mark
 
James L said:
404.2(c) says you have to provide a grounded conductor for controls. But if you can see the entire floorspace of an area from the switches, you only need at one switch
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Another instance of stupid code. Just make a neutral required at every switch location unless there is a raceway where if needed it can be added later. There is no reason why the NEC needs to make this so complicated. :rolleyes:
 
infinity said:
Another instance of stupid code. Just make a neutral required at every switch location unless there is a raceway where if needed it can be added later. There is no reason why the NEC needs to make this so complicated. :rolleyes:
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Yeah, they took the long way around the barn
 
busman said:
Solves the issue of running two 120V circuits that used to be done with a 3 wire cable and a MWBC. AFCI does not support MWBC. Also can be used for 2 GFCI circuits without paying the big price for 2-pole GFCI.

Mark
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Correction: Some AFCI's do not support MWBC. Early AFCI's pretty much none did though. Once they found ways to pass listing without a GFP component, those that went that way will work on MWBC's, or a two pole AFCI is an option that wasn't always there either.
 
14-2-2 could be used for anything where you need four conductors and an equipment ground. NEC permits re-identifying a white conductor in a cable assembly if not used as a grounded conductor. Probably could even use for running two 240 volt circuits and re-identify both whites if you wanted. Not all that likely to run into that situation other then maybe for something like baseboard heat circuits.
 
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