wire sizes on electrical schematics

[mull982]

Hello

I think I understand, but just wanted to get clarification. On an one-line electrical schematic when it shows a feeder as being, 2-1/C-500 KCMIL Per Phase does this mean that it is a parallel feed with 2 500 KCMIL conductors per phase. Does 1/C stand for "1 conductor". I am assuming that the first number in the numbering scheme indicates that it is a parallel feed if it is greater than 1, and the number indicates how many conductors there are per phase in the parallel feed. Do I have this information correct.

Thanks

 

[charlie b]

There really is no standard way to convey this kind of information on a schematic or on any other type of drawing. But I interpret this one the same way you do.

 

[rr]

Hello

I think I understand, but just wanted to get clarification. On an one-line electrical schematic when it shows a feeder as being, 2-1/C-500 KCMIL Per Phase does this mean that it is a parallel feed with 2 500 KCMIL conductors per phase. Does 1/C stand for "1 conductor".

That nomenclature is a bit confusing.

For parallel runs I usually state the intent at the beginning: "(2 sets) 4#500kcMIL....."

 

[kingpb]

I would agree with Robbie, we usually state like this for a 3 phase circuit with parallel ungrounded conductors with no neutral....

(2) 3-1/C 500KCMIL, #2AWG GND, 3" EMT

 

[iwire]

I don't see conductor info directly on prints very often

Most of our prints have a "Feeder Schedule"

On the print will be a number beside the run and you match the numbers on the feeder schedule.

The feeder schedule will give all the info, raceway type and size, conductor type, size quantity and insulation.

If I saw 2-1/C-500 KCMIL I would likely assume two single conductors per phase but I would also see if that made sense for the load and if it was not clearly correct I would RFI.

500 CU is running more than $10 per foot, to much money to guess about.