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#218857 - 11/21/17 09:05 PM Nec circuit protection  
Jkhayward  Offline
New Member
Joined: Nov 2017
Posts: 1
Fort Wayne in
Hello. Im building an electrical panel that has the following drives, 1) 200 hp drive, 1) 100 hp drive, 1) 60 hp drive, 2) 15 hp drives. The customer doesn’t have the power on his bus to handle this load. The customer is going to place a indivual disconnect for the 3 larger drives. These 3 disconnects are in 1 panel and it will be attached to the side of the panel I’m currently building. I was asked to just put the large drives and lugs for the input and output and connect the drives to “just” lugs. No other circuit protection will be supplied by us. I believe that there are several code violations in building this. I am not familiar enough with nec to show the owner why this isn’t to code. Please help. Thanks


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#218858 - 11/21/17 11:01 PM Re: Nec circuit protection [Re: Jkhayward]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,140
Estero,Fl,usa
You can pretty much start in article 240 and everything you read will say conductors have to be protected at their ampacity.
If you are just using this panel as a junction box with no over current protection, all conductors down stream will have to be sized to the last over current device serving that feeder.
I think I would leave skid marks in the driveway getting away from this job unless they are willing to do it right and provide proper power to this load.


Greg Fretwell

#218859 - 11/22/17 03:22 PM Re: Nec circuit protection [Re: gfretwell]  
Yoopersup  Offline
Member
Joined: Mar 2003
Posts: 840
Michigan
Article 430 covers OCP ect for motors.
Page 70-323 Figure 430.1 Well tell you where to look.



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