mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
Does anyone have a PDF or some type of reference on typical short circuit values for their service? .........
Con Edison Fault Current
- Thread starter mbrooke
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zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
For where? (IIRC there was a fairly long thread which covered that in the last year- "network distribution" etc).
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
have you considered calling them and asking?
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
mivey
Senior Member
no such thing
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
You have either radial, spot network, or secondary network. Not many other options.
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
Mid-town Manhattan or the "weeds" of Westchester Co (if such a place still exists)?
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Length of drop or lateral, size of conductor and type plays into it, the longer the drop, the lower the current. Or are you looking for a starting point? Such as the transformer terminals?
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
Typical values at a 120/208Y service.
zbang
Senior Member
- Location
- Roughly 5346 miles from Earls Court
See https://forums.mikeholt.com/threads/nyc-power-outage.150621/, it has a ton of info.
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
Good info- but nothing I'm seeing on typical service short circuit values.
- Location
- Illinois
- Occupation
- retired electrician
I am sure that across the ConEd system there are huge variations in the available fault current. On a recent Mike Holt webinar, an engineer that works in the networked areas says that there are locations where it exceeds 200kA and others where it is below 100kA
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
No surprise- he is correct. But I'm looking for official documentation. Something that I can site.
Have a link btw to the webinar?
- Location
- Illinois
- Occupation
- retired electrician
No, I don't and not 100% sure that it was one of Mike's, it could have been one of Thomas Domitrovich's. They both have youtube channels, but not idea of exactly what one that information was in.
Official documentation has to come from the utility on a case by case basis.
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
So how do I know what equipment so select? How do I know a service change is up to code?
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
You ask the POCO during the application process?
mbrooke
Batteries Included
- Location
- United States
- Occupation
- Technician
Haven't here- but to often I've been told "assume 200,000 amps"
- Location
- New Jersey
- Occupation
- Journeyman Electrician
mivey
Senior Member
Again, as I have said and some others have said as well, there is no such thing as typical.
Utilities run coordination studies. They know the calculated fault current for existing conditions. They also know the worst case scenarios for an area. You just have to reach the right people.
The calculated values will vary by area and the worst case values will vary by area. Across the board typical does not exist.
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