It is obvious in the OP that they are circuit breaker sizes, not MCA or MOCP.
WIRE SIZE PER DRAWING
- Thread starter mannyb
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It is obvious in the OP that they are circuit breaker sizes, not MCA or MOCP.
- Location
- Massachusetts
I would say it is not an important question because the job has an engineer of record and prints which indicate the sizes they chose. I assume the OP or the OPs company bid the project based on those prints.
Now don't get me wrong, sometimes you have to ask for changes, I am doing a small office remodel now and the drawings show me turning 1.5" EMT up into a wall cavity from a under a raised floor but there is no space to do so. The inside radius would be in the visible outside the wall.
So an RFI went out for that.
I did not ask why they wanted the following from the floor box to the TV on the wall and up to the ceiling,
3/4" Power
3/4" Data
3/4" POTs
1.25" - AV
1. 5" - AV
3/4" spare
1.25" spare
1.5" spare
seems overkill to me but that is beyond my job scope.
That is one room, I have two others the same without the 1.5" runs.
Like you seemed to say, too much overthinking here. Provide what you bid, which should be what was in the documents, unless there is an error, then ask.
kwired
Electron manager
- Location
- NE Nebraska
MOCP is a circuit breaker size
And I highly suspect MOCP is what the figures are but it wasn't really stated in by OP either.
Voltage drop should be based on actual load though, so MCA is a much better value to base VD calculations on then MOCP.
Oh, please don't go there. You will awaken the troll.MOCP is a circuit breaker size
hmy:
It's nice to hear a contractor say that. I get the feeling many EC's call that profit.
kwired
Electron manager
- Location
- NE Nebraska
Bob only works for a contractor, if boss tells him to veer from the print, he probably does what he is asked with little question as to why.
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
FWIW, I welcome questions like that and I will make the change if it is warranted or if I have overlooked something. We all do from time to time.
- Location
- Massachusetts
True and not one of my bosses encouraged me to change engineered wire sizes.
I do the job I am paid to.
Of course.
I was just relating my experiences and for that reason I choose to limit my RFIs that really effect the job.
What is my motivation to reduce wire sizes anyway, it going to result in needless paper work logging the change, assigning a value, issue a credit etc.
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
But by the same token, if you come to me with a reason to increase a wire size, I will thank you for correcting my oversight.
- Location
- Massachusetts
And again my experience has taught me your reaction is uncommon.
Is my experience everyone's? Heck no, but it is mine.
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
And again my experience has taught me your reaction is uncommon.
Is my experience everyone's? Heck no, but it is mine.
A valuable trait for any engineer to cultivate is the ability to switch sides in a discussion immediately with no ego attachment to either side in the face of hard evidence. When an electrician comes to me and points out something I have overlooked or not taken in consideration in my design (it happens), I thank him and make the change with no hard feelings. I know a lot but I don't know everything.
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