I have an 800A breakers and would like to install two 400 amp, QMB panelboards with 400 amp main fuses. Each panel is located approximately 50 feet apart. Can I daisy chain off the top of the main fuse of one panelboard to the next panelboard as long as I used 2 sets of 500kcmil to feed each panelboard or does this violate the tap rule?
Daisy Chaning Panels
- Thread starter SRBurr
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If the parallel 500 kcmils feed the 1st panelboard and with properly rated lugs, continue to the 2nd panelboard and your calculated load does not exceed the ampacity of the feeder ** you are good to go.
It is not a "tap" by NEC definition (240.2).
You would need to make sure your lugs are properly rated and you meet 312.6 & 312.8.
**The ampacity of the feeder would depend on # of wires in each conduit, type load (linear/nonlinear), ambient, etc. but in the best case scenario would be 760 amps.
It is not a "tap" by NEC definition (240.2).
You would need to make sure your lugs are properly rated and you meet 312.6 & 312.8.
**The ampacity of the feeder would depend on # of wires in each conduit, type load (linear/nonlinear), ambient, etc. but in the best case scenario would be 760 amps.
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