Multiple circuits in conduit

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hbdocm

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Hi,

I just looked at a house that needs a panel upgrade and I will need to relocate the panel to an area with no attic access. The only thing I can come up with is removing the existing panel and adding a junction box to run Schedule 80 pipe around the house to a surface mounted metered panel. My question is can I run different amperage circuits in the same conduit? I know running everything together will also derate the wiring so am I better off running a few conduits rather than just 1? I am relocating about 10-12 circuits (mostly 15-20A and I believe (1) 30a, 40A and 50A. Since the house has only 10 circuits I am sure alot of these circuits are close to maxed out so I am concerned about derating. Any info you could provide would be greatly appreciated.

Thanks!
 
You can run different amperages in the same conduit. Try and keep the numbers down to 9 CCC with THHN or THWN wire so you can derate from the 90C col and still be good at 70%
 
I would figure out the number of CCC's that you have and use that information to decide how many conduits you need to run without increasing the conductor size due to derating.
 
normally in a situation like that, one leaves the existing panel and just makes it a subpanel, feeding it from the new main panel, and only having to run one feeder to it.
 
Normally I would turn it into a subpanel but the reason for it being moved is because the panel only has 1' of clearance in front of it.
 
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