Distribution Panelboards with Fuses

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faresos

Senior Member
Can we use copper bars in lieu of fuses for a distribution panelboard (or switchboard) as a disconnecting mean for the main switch? This board is fed upstream from 800A/3P fuses. We just need a disconnecting mean for this board since the source is located remotely in different room. Thanks in advance
 
I would normally recommend using an actual 'dummy-fuse', but above 800A I think you need to use a home built one.
 
mike7330 said:
jim
what's the lowest interrupting capacity that could be used with a dummy-fuse? ;)

mike
Click to expand...

That would be zero amps.
AIC has to do with interrupting a fault, a dummy fuse would be expected to withstand a fault.
It is likely that it could have a relatively high SCCR, as the bus used is not likely to 'flex and deform' in such a short distance as a fuse.
 
jim dungar said:
That would be zero amps.
AIC has to do with interrupting a fault, a dummy fuse would be expected to withstand a fault.
It is likely that it could have a relatively high SCCR, as the bus used is not likely to 'flex and deform' in such a short distance as a fuse.
Click to expand...

Jim
I knew I couldn't fool You!

Mike
 
Am I missing something? Was the original question about disconnects (as opposed to fuses)? The panelboard has a disconnect and fused protection somewhere (in another room)? So no other disconnect is required (i.e. in sight of the panelboard). Correct?
 
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