Discuss Short circuit capacity??????? in the Commercial Electrical Advice area at ElectriciansForums.net

K

KFORDHUNTER

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How do you work out the overcurrent devices short circuit capacity in KA, i thought it was just written on it, if you can't find it what do you do then?

HELP!!!!!!!!!
 
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S

sparkyork

do you have any bs no.s etc or more information on the overcurrent device?
 
K

KFORDHUNTER

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  • #3
I don't mate but i think rule of thumb on a relatively new switch is 16ka, is that the right assumption?
 
S

sparkyork

i wouldnt like to say matey! new 60898 mcb's are 6Ka i think but...
 
K

KFORDHUNTER

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  • #5
I don't think i explained it that well mate, i'm talking about the main switch for the consumer unit, the value is needed for the cert thats all.
 
W

wayne

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  • #6
usually printed on ,there are guide tables in the osg for circuit protective devices other than that its time to consult the manufacturer,
can someone add a virus to sparky yorks avatar?:D
 
P

PAUL M

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  • #7
it is a bit bright,i was looking at it just and i could feel it sucking my eyeballs out of me head,aaaaaaaaggggggggghhhhhhhhhhhhhhhhhhhhhh
 
S

sparkyork

ha he im trying to create one with a nice electrical arc in it at the mo!! sure its hypnotic!!
 
W

wayne

  • Thread Starter Thread Starter
  • #9
just been sat staring at it for ages
 
S

sparkyork

shall i get rid of it till i get me new one made?! really dont wanna upset anyone! lol
 
W

wayne

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  • #11
might be an idea ,could put people off reading your posts
 
S

Shakey

  • Thread Starter Thread Starter
  • #12
I don't think i explained it that well mate, i'm talking about the main switch for the consumer unit, the value is needed for the cert thats all.
not come accross that one before, its not an protective device is it? if it s just an isolator, why would you need the short circuit capacity?
 
K

KFORDHUNTER

  • Thread Starter Thread Starter
  • #13
Shakey need your hekp on this, just got kewtech schedule of test results, the cert you fill in all the test results on, and ther is a box with "overcurrent device short circuit capacity" in KA. I was told this was the capacity of the main switch of the cu, is this right? If not what does it mean. Thanks.
 
S

Shakey

  • Thread Starter Thread Starter
  • #14
Shakey need your hekp on this, just got kewtech schedule of test results, the cert you fill in all the test results on, and ther is a box with "overcurrent device short circuit capacity" in KA. I was told this was the capacity of the main switch of the cu, is this right? If not what does it mean. Thanks.
aahhh, i can see now

like i said the main switch is not a protective device

the overcurrent protective device for the installation is the suppliers fuse (often a 1361), they quite often have the Ka value written on them;)
 
K

KFORDHUNTER

  • Thread Starter Thread Starter
  • #15
Cheers mate, mine is a bs88 100a fuse, no ka on it, do u know what it would be?
 
K

KFORDHUNTER

  • Thread Starter Thread Starter
  • #17
thanks for your help mate.:):):):)
 

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