Seperate groung & neutral

[Alwayslearningelec]

If a note says each duplex receptacle ckt is to be run with a seperate ground and neutral would each ckt require 3wires? So if I has ckt 2,4,6 along a wall would it be 3 wires, then 6 wires then 12 wires....that does not sound right?

Thanks.

 

[infinity]

If a note says each duplex receptacle ckt is to be run with a seperate ground and neutral would each ckt require 3wires? Thanks.

That sounds like what they're asking for. Circuits 2,4,6 would require 9 conductors.

 

[KevinVost]

IMO sounds like ckt 2 would have neutral, hot and ground,
ckt 4 would have neutral, hot and ground,
ckt 6 would have neutral, hot and ground,

basiclly dedicated wiring for each circuit. So you would have 9 wires for three circuits and you would route your wiring from outlet to outlet using only the circuit wiring indicated, no mixing of grounds or neutrals.

 

[Alwayslearningelec]

So I could not use mc outlet to outlet because when I leave the 2nd outlet I would need 12/6 mc..........correct? I would have to run mc to a hr junction box where the circuits would meet.

Thanks very much.

 

[Rewire]

If you are going outlet to outlet on the same circuit 12-2/g would work.I would get an RFI they could just be wanting to eliminate MWBCs and a comon EGC could be used

 

[KevinVost]

You could go recepticle to recepticle with MC (daisy chain) , you just can't mix circuits. Don't run your circuits together or you get alot of wires in one pipe. To keep in simple, run your circuits out individually and go from outlet to outlet, don't mix the circuits and you will meet the requrements of the note in the plans.

 

[KevinVost]

If you are going outlet to outlet on the same circuit 12-2/g would work.I would get an RFI they could just be wanting to eliminate MWBCs and a comon EGC could be used

Agreed, and in doing so they would be avoiding the need for breakers w/tie handles on the MWBC's. (assuming your under the '08 code)

 

[augie47]

It's rare that such a requirement is fully enforced. As mentioned most often they are trying to eliminate MWBC, and seperate equipment grounds are rare today also, but unless you can get permission (or forgiveness) you are stuck with 3 seperate wires per outlet.

 

[Alwayslearningelec]

What do you mean by MWBC( multi wire branch circuits)? Also, Kevin yo say that I can go outlet to outlet without mixing circuits. I don't understand or can I visualize what you mean. If I am running pipe I can go outlet to outlet but if it is really 3 wires per ckt how can I run 12/3 mc outlet to outlet assuming they are each a different circuit?

Thanks.

 

[KevinVost]

What do you mean by MWBC( multi wire branch circuits)? Also, Kevin yo say that I can go outlet to outlet without mixing circuits. I don't understand or can I visualize what you mean. If I am running pipe I can go outlet to outlet but if it is really 3 wires per ckt how can I run 12/3 mc outlet to outlet assuming they are each a different circuit?

Thanks.

MWBC-multi wire branch circuit:grin:

Recepticle to recepticle with MC cable. Much easier to install.

If you go in pipe you will need to size for all nine conductors, then account for ampacity derating (7-9 conductors in conduit=70%), allow for larger boxes for wire fill, then not confuse the circuiting at each recepticle and keep all the conductors from each circuit together.

On a side note, the term outlet can mean a lighting outlet or location where power is used, the term recepticle is used for a single or duplex wiring device recepticle. You will find that alot of the folks here try to use the NEC termonology not the trade language:smile:

Hope this helps.

 

[infinity]

If you go in pipe you will need to size for all nine conductors, then account for ampacity derating (7-9 conductors in conduit=70%), allow for larger boxes for wire fill, then not confuse the circuiting at each recepticle and keep all the conductors from each circuit together.

For 3 circuits with separate ungrounded, grounded and EGC's you would only have 6 CCC's not 9. The EGC's wouldn't count as CCC's so your derating would be at 80%.

 

[KevinVost]

For 3 circuits with separate ungrounded, grounded and EGC's you would only have 6 CCC's not 9. The EGC's wouldn't count as CCC's so your derating would be at 80%.

Agreed, thanks