Russell Ensslin
Member
- Location
- Olivehurst California
What's a Short Circuit Current Rating? (SCCR)
Definition says, "Prospective symmetrical fault current...able to be connected..."
What is the "Prospective" part?
What is the "Symmetrical" part?
Why is the incoming current assumed to be "Fault Current" if it is the device receiving the current?
It is referring to current being received only, isn't it?
So if I have a GFCI receptacle with a SCCR of 10,000 amp being protected by a 20 amp, over-current device with a 10,000 amp SCCR protected by a 200 amp main with a SCCR of who-knows-what, then some current would have to blow through the main breaker and then through the 30 amp breaker to send 10,000 amps to the GFCI?
Is that what this is saying?
Wouldn't the main breaker trip after 200 amps? And if it failed, wouldn't the 30 amp breaker trip after only 30 amps? Is this all just theoretical? Or, perhaps, in the event of lightning or something like that?
Definition says, "Prospective symmetrical fault current...able to be connected..."
What is the "Prospective" part?
What is the "Symmetrical" part?
Why is the incoming current assumed to be "Fault Current" if it is the device receiving the current?
It is referring to current being received only, isn't it?
So if I have a GFCI receptacle with a SCCR of 10,000 amp being protected by a 20 amp, over-current device with a 10,000 amp SCCR protected by a 200 amp main with a SCCR of who-knows-what, then some current would have to blow through the main breaker and then through the 30 amp breaker to send 10,000 amps to the GFCI?
Is that what this is saying?
Wouldn't the main breaker trip after 200 amps? And if it failed, wouldn't the 30 amp breaker trip after only 30 amps? Is this all just theoretical? Or, perhaps, in the event of lightning or something like that?