Class J versus Class RK fuses

Professional Engineer & PE Exam Forum

Help Support Professional Engineer & PE Exam Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Dothracki PE

Where is my mind?
Joined
Jul 2, 2020
Messages
2,080
Reaction score
1,491
Location
New Jersey
I have been trying to research this a little bit but I haven't really come up with an answer. Anyone know what advantage I would have to specify class J fuses as opposed to RK1 or RK5? It seems to me that the instantaneous region is lower compared to the RK1 or RK5 and that is where coordination tends to be the most tricky. But maybe for that reason I would use class J on the downstream device so that it trips first.

 
Back
Top