Is there any standard notation used for calling out wire?

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rrc14

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Location
Anchorage, AK
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Engineer
Is there any standard notation used for calling out conductors on plans?

I get easily confused when I see this on a cable schedule: 3-1/C #12

Does 3-1/C #12 refer to (3) separate #12 conductors or a single cable assembly with (3) conductors?

Thanks,
 
480sparky

480sparky

Senior Member
Location
Iowegia
You specs should also specify what wiring methods are to be used.

I've never seen the format you posted. If it's conduit, it looks to be 1", which is overkill for 3 12s.
 
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shamsdebout

Senior Member
Location
Macon,GA
rrc14 said:
Is there any standard notation used for calling out conductors on plans?

I get easily confused when I see this on a cable schedule: 3-1/C #12

Does 3-1/C #12 refer to (3) separate #12 conductors or a single cable assembly with (3) conductors?

Thanks,
Click to expand...

yeah that is confusing, we normally call out conductors as:
3#12,1#12G-1/2"C.
That seems to do the job.
 
don_resqcapt19

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
rrc14 said:
Does 3-1/C #12 refer to (3) separate #12 conductors or a single cable assembly with (3) conductors?

Thanks,
Click to expand...
That is a common notation in this area. The 3 is the number of conductors. The 1/C tells you that it is a single conductor. If it is a cable with multiple conductors then the 1 would be changed to the number of conductors in the cable. And the #12 tells you the size of the conductors.
 
weressl

weressl

Esteemed Member
Location
Texas by the Gulf, geat crab, great shrimp
SAC said:
Maybe that is three #12 insulated conductors and 1 uninsulated conductor in a cable? That notation appears all over this schematic:

http://eplan.dot.il.gov/desenv/042806/AU062-03A/Plans/11x17-042806-AU062-03A-066-038-11x17.pdf
Click to expand...

Bit confusing. The use cable when they mean conductor. They fail to identify the conduit on the connection drawing in the upper left hand so you may think that those are multiconductor CABLES instead of single CONDUCTORS until you start looking at the individual assembly drawing at the lower center.

Common design mistake is to represent the same information in slightly different form. That is why one would use a Bill Of Material table and use that number on the different representation. 'Say it once, then refer to it multiple times' is a good rule to follow.
 
Mike01

Mike01

Senior Member
Location
MidWest
My 2 cents.

My 2 cents.

My preference for what it?s worth
??c.-3#12&1#12grd.
Always list conduit first,(conduit gets installed before wire)
If it indicates 3-1/C to me that would be 3#12
1-3/C would be a three conductor cable (SO, etc)
 
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