One line diagrams representation
One line diagrams representation
(OP)
Dear colleagues,
This may be a very fool question, however, I would like to receive some feedeback related to the standarized way to express in a single line diagram the following:
Size of conductors
Number of conductors
Typically, we receive many one line diagramas showing data in a non standarized format, let's say:
12-500 kCM
When we ask to the person who did it, the answer is 4 conductors per phase, however, sometimes, we have seen that the feeder ampacity only "matches" with 12 conductors per phase.
I guess there should be a standar way to express this and avoid confusions, because of that I hope that from your experience may recommended me something to look for and avoid mistakes.
Best Regards,
This may be a very fool question, however, I would like to receive some feedeback related to the standarized way to express in a single line diagram the following:
Size of conductors
Number of conductors
Typically, we receive many one line diagramas showing data in a non standarized format, let's say:
12-500 kCM
When we ask to the person who did it, the answer is 4 conductors per phase, however, sometimes, we have seen that the feeder ampacity only "matches" with 12 conductors per phase.
I guess there should be a standar way to express this and avoid confusions, because of that I hope that from your experience may recommended me something to look for and avoid mistakes.
Best Regards,






RE: One line diagrams representation
To reduce ambiguity and opportunity for contractor creativity, we generally would write:
4-500 kcmil/phase
or
4-4"C with [3-500 kcmil, 1-#4/0G] each
This is also covered in our legend.
In your part of the universe, the custom may be totally different.
RE: One line diagrams representation
I thank your reply!
As you mentioned, sometimes, our customer has enough creativity, some other, even the customer does not have a clear idea of the meaning because has had so many contractors and each one defined its own style but there´s nothing written.
We typically follow our national code which is almost a translation of NEC, however, as you stated, there is no code!
Best Regards
RE: One line diagrams representation
Probably putting an example in the legend is the best approach.
RE: One line diagrams representation
RE: One line diagrams representation