52/a and 52/b contacts requirement

[sanjay12345]

Hi all,

Is there any CSA or ANSI rule that tells a breaker should have 52/a & 52/b contacts ?

I know that mccb up to 400A doesn't have the 52/a & 52/b contacts.

But I am talking about 5000A, 600V breaker. Is there any ANSI or CSA code that says this breaker should have 52/a and 52/b contacts ?

I'll appreciate reply.