My building has instead of 2 20 circuits, 4 20A circuits, two
of which are GFI protected. And all of this is being fed from a 40A breaker
in the previous sub panel? I don't have a complete electrical
understanding, but his couldn't be right could it? We are having trouble with
having enough power on our circuits in the building sometimes depending if
someone is using electricity further down in the facility. Is there any fix
by increasing the size of the breakers down the line?
Hi Michael - Great Question!
No - increasing the size of the circuit breaker is not the answer.
Increasing the capacity of the circuit by installing larger wire is, but
this must be supported all the way back to the main panel that supplies the
power for all. It sounds like the whole system needs to be reconfigured based
upon actual loads that are being connected throughout and then upgrading the
From my experience, storage units supply only enough power for lighting to
each unit. If the breaker size is increased without increasing the
size of the wire then there will be a high risk of fire due to overheating
the existing wire size.
Thank you for your response, that was what I had kind of figured but didn't
want to hear due to the inconvenience. They have several 70w HPS High Pressure Sodium ballasts
that have been burned out and not replaced for a long time now, so I am sure
they WILL NOT spend any money money on an upgrade. So the 40A on the
previous panel feeding the 4-20A circuits on mine is not a problem?
A first hand inspection of the panels and the circuits would need to be done to fully determine if there is a problem with the 40 amp circuit.