MCCB AND MCB
MCCB AND MCB
(OP)
I HAVE A 63 MCB IN A MAIN PB IN GROUND FLOOR IS FEEDING A 63 MCCB IN A FIRST FLOOR ITS A VILLA AND BOTH ARE 3P.
MY QUES IS CAN A MCB FEEDS A MCCB OF? AND IF IT CAN WHAT ARE THE CONDITIONS NEEDED TO BE DONE AND IS THERE IS ANY ARTICLE ABOUT THAT IN NEC OR IEC PLZ INFORM ME
MY QUES IS CAN A MCB FEEDS A MCCB OF? AND IF IT CAN WHAT ARE THE CONDITIONS NEEDED TO BE DONE AND IS THERE IS ANY ARTICLE ABOUT THAT IN NEC OR IEC PLZ INFORM ME






RE: MCCB AND MCB
It can, but why would you want to? Waste of money, and you won't get any benefit of the higher performance of the 63A MCCB.
Is the CAPS lock on your computer broken? Either buy a new keyboard or stop posting until you fix it.
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If we learn from our mistakes I'm getting a great education!
RE: MCCB AND MCB
RE: MCCB AND MCB
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If we learn from our mistakes I'm getting a great education!
RE: MCCB AND MCB
But if your system from the utility has an Available Fault Current (AFC) that is lower than 10kA (or whatever) rating of the MCB, then the MCB will be OK. If that is the case, then as Scotty said, someone wasted money buying an MCCB to go down stream from it, an MCCB will always have a higher IC rating than an MCB. The interrupt capacity in the circuit however is only as good as the weakest link, in this case the MCB.
If on the other had the AFC is greater than whatever the MCB is rated for and someone in the past replaced an MCCB with it, as I might expect, then that will be a dangerous violation of whatever codes are enforceable in your neck of the woods. It bears some serious attention to detail.
In either case you will not find a publication telling you what you want to hear, because apart from the waste of money, there is no rule against having a device that is seriously overqualified for the task at hand. So if like I said, the AFC is below the interrupt capacity rating of the MCB, then there is nothing inherently wrong with having the MCCB down stream of it.
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RE: MCCB AND MCB
G.F.
www.engineering-services.gr
RE: MCCB AND MCB
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If we learn from our mistakes I'm getting a great education!
RE: MCCB AND MCB
G.F.
www.engineering-services.gr
RE: MCCB AND MCB