ECN Forum Forums General Topics of the Trade General Discussion Area kasc

Dennis...

You might pick up the phone and ask the EE.

They'd be delighted to hear from a field electrician.

The very few time I've had the pleasure of meeting the EE's who wrote my plans it was happy times and fellows well met.

THERE IS NO ONE AN EE WOULD RATHER CHAT WITH THAN THE DUDE IMPLEMENTING HIS WORK.

It gets them totally stoked. You realize their scheme -- and it may be a thing of beauty. Certainly, that's what MY EE's thought.

Yeah, cameras were popping everywhere. The installed work became part of THEIR portfolio, too.

BTW, ALWAYS photo your work. It is a fantastic sales/ job securing gambit. Now that we are in the digital camera age, it is expected.

Absouletly, but it is not refered to as ASC.
Just like Ibf = Amperes Bolted Fault, is not called ABF.

My point has been kASC is not a commonly accepted or understood acronym.

JBD:
Yes, as you say, kASC is not a term that is normally used, and can be tough to grasp what it is being used for.

When I read the OP, I made an assumption that the OP made a typo, or someone who provided him info or documents made a typo.

Acronyms can and do get confusing, as above posts interchange from Ohms law symbols (letters) to terms we use in the trade. ie: "I", "E", "R", "P" that are within Ohms Laws, and "A" "V" 'Omega symbol' and "W" that are trade.

Hopefully, your point above is accepted by all.

KASC Thousands of amps of available short circuit current

KAIC Thousands of amps Interupting Capacity. The ability of the overcurrent device to stop the the fault.
So a code fuse is 10 KAIC
an Hrc fuse is 100 0r 200 KAIC.

Is this a Canadian acronym?

It is definitely not commonly used in the US; we say kSCA.
I do not believe it is common in Europe either.

JBD...

The term comes from Bussman...

And their little known calculations in Uglies...

This has been discussed up thread.

Times, terms ...

They do change.

As an identifiable calculation...

It's been out there for quite some time.

Must you stand as King Knute damning the tides?

It's not as if I or any poster here came up with the notation.

Instead, it comes from the premier manufacturer of fuses.

I understand that as of 2011 the Code expects this calculation to be done across the board.

BTW, if you were a real historian of scientific/technical notation then you'd know of the CONSTANT shift of terms of art. If you were to read Newton - you'd choke on his writing. The Physics is the same -- but NOT the notation.

Against the influence of Uglies and Bussman...

Your purity of notation must be for nought.

INRE your assumption that I was wildly off base: I think I've answered that.

The purpose of ECN is to expand knowledge...

NOT to get into personal disputes and putdowns.

That kASC is, in your view, not a correct/traditional notation does not mean that the term is not in use -- constantly, if Bussman is to be followed.

----

From here on, such calculations are destined to be ever more common. I don't particularly care WHAT the notation is.

But that kASC/kSCA point to the SAME metric works for me.

I perform short circuit calculations for my living as a power systems engineer. I have been doing so for many years and have never come across the acronym kASC. I do not find it in my copy of UGLY'S (but it is the 1990 edition. It is not in my copy of Bussmann's SDP dated 2002. I do not see it in SKM's Power tools for Windows (one of the premier power system software programs) nor in any of IEEE's color books.

I just downloaded Bussmann's latest copy of SPD, and searched for both ASC and KASC, and neither was found.

I stand by my statement that KASC is not, currently, a commonly used acronym within our industry.

Gentlemen:

I think by now, the popular opinion is that the acronyn "KASC" was probably a typo within the OP, or a transposition.

As JBD said above, the term is NOT within the Bussmann literature, as I use there literature (with permission) within a Fault Current CEU that I present. I also use 'UGLYS' within a class I teach at a local Vo-tech, and to my knowledge, it is not within same either.

All that said, let us NOT turn this thread into a 'flaming' issue!

No not Canadian, just an answer to the original Question.

Schneider Series rating guide uses KA Sym
Bussman fault current calculator uses SCA (Short Circuit Amps) and ASC Available short circuit current
Cutler hammer's series rating guide is using KA Sym.
GE series rating guide only seems to refer to XXX Amperes IC as the term.


It seems the terminology has gained prominence in the discussion and has taken a life of it's own. Rather than argue about whether it is a defined term or not lets accept it is becoming code language (or not) and address the question. Is the question ambiguous because of the terminology? If that answer is yes then I appreciate the point of defining the term in a particular way. I think every one in the discussion knows what is being asked here.

I have just looked at the Bussmann downloadable Short Circuit Calculation software, it does not use this acronym.

Proper usage of acronyms and terms is very important. There are many questions that are answered inappropriately because the parties mis-understand the terms being used.