SCC Ratings

Nearbyatom

Member
Join Date
Jul 2017
Location
USA
Posts
38
I have 2 panels. Main power comes into the main panel, Main panel will distribute power to the motor control panel. I need an SCCR for the main panel, but do I need it for the motor control panel too?
 
Yes. Every panel must have an SCCR label.

jraef,
However, just as an FYI, the 2014 NEC Article 409.110-4's (exception): "SCCR markings are not required for industrial control panels containing only control circuit components."

I don't have the 2017 NEC so this may have changed.

It sounds like the OP's panels probably have motor starters in them and therefore would require a short circuit current rating marked on them, so you would indeed be correct.

Why does interpreting codes, standards and specifications have to be so difficult? Ugh!!!
 
jraef,
However, just as an FYI, the 2014 NEC Article 409.110-4's (exception): "SCCR markings are not required for industrial control panels containing only control circuit components."

I don't have the 2017 NEC so this may have changed.

It sounds like the OP's panels probably have motor starters in them and therefore would require a short circuit current rating marked on them, so you would indeed be correct.

Why does interpreting codes, standards and specifications have to be so difficult? Ugh!!!
Yeah, good point. I automatically consider that, meaning I don't bother thinking about SCCR for anything below a control transformer's primary fuses. But when telling other people I have to remember to make that clear. Thanks for catching it.
 

Similar Topics

I just asked tech support at Phoenix Contact a question and the answer is making me think maybe I have misunderstood relay ratings for years...
Replies
16
Views
2,758
Good Morning all, I am a beginner level PLC guy, I am planning to setup a lab using Allenbradly Compactlogix 5380 controller. I have selected the...
Replies
1
Views
1,536
Hi, I'm a little bit confused on how understand the short-circuit ratings on some components in my cabinet and hoping for some advise. I have...
Replies
4
Views
1,906
Trying to get a feel for whether engineers outside of N. America know what NEMA ratings are. Does your typical European, Asian, S. American...
Replies
18
Views
5,198
Would very much appreciate it if someone could explain to me how the temperature ratings work. I see that ambient + hot spot + winding rise at...
Replies
2
Views
1,144
Back
Top Bottom