highpowered
Member
- Location
- los angeles
I'm submitting them now with the other corrections. I just wanted to get the Documentation for series rated main breakers before I submit everything else
Series rated NEC 240.86
- Thread starter highpowered
- Start date
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
In the 2020 NEC, the requirement to label the short circuit available on panelboards was added.
408.6 Short-Circuit Current Rating. Switchboards, switchgear, and panelboards shall have a short-circuit current rating not less than the available fault current. In other than one- and two-family dwelling units, the available fault current and the date the calculation was performed shall be field marked on the enclosure at the point of supply. The marking shall comply with 110.21(B)(3).
Elect117
Senior Member
- Location
- California
- Occupation
- Engineer E.E. P.E.
I thought he was referencing post 11 with the inspector / plan reviewer's comments:
"
My corrections from the Authority having Jurisdiction are to summarize
1) Provide supporting Documentation Systems employing series rating...
A, Manufacturers Catalog sheets verifying an approved series rated system. ( I cant find anything saying it is Series Rated) The main breaker is Siemens 3VA53 400A MJAS 85KAIC)
B. Comply section 110.22 and 240.86A This is Labeling?
"
You are definitely correct about 408.6. I was just saying he can't put the sticker for 110.22(B) / 240.86(A) since his system isn't series rated. At least from the info provided.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
The NEC requires documentation saying the system is fully rated (noted by comparing the OCPD ratings versus the posted SCA) or support for any series ratings which might have been used.
Elect117
Senior Member
- Location
- California
- Occupation
- Engineer E.E. P.E.
I am not sure I understand the comment. Maybe I missed something?
Based on the OPs responses, your post #18, and the back and forth about him updating his plans with the available fault currents at the OCPDs, I am under the impression his system is fully rated and would not need a sticker that says:
"CAUTION — ENGINEERED SERIES COMBINATION SYSTEM RATED _______ AMPERES. IDENTIFIED REPLACEMENT COMPONENTS REQUIRED."
Ron already corrected the original incomplete comment regarding the fault current sticker for 408.6 (correcting post #20). I was too locked in on the inspector's comments from post #11.
Is there another labeling requirement he would need? This is in response to his post #19 (below).
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
The service needs to be marked with the available fault current. (110.24(A) 2017)
If series rating are used they must be documented (240.86(A) 2017) and caution labels put on affected equipment. (110.22(B) and 240.86(A & B) 2017).