I use a lot of Siemens panels, let us know how it turns out.

 

Are the stabs adjacent to the main bent on purpose on those panels? I've never seen that before. It sure looks like it will fit but you never know until you try.

 

Yah they prevent someone from removing the covers and adding a breaker to those bent stabs.

 

It's surface mounted!! Replace the whole thing. Your question made me think it was mounted in some hellish spot like flush in lath and plaster or flush in masonry. Put a 40 circuit in and give them a few more spaces. What would you do in your house?

 

Exactly. Flush mount, 1 conduit, all romex. By the time you posted this you could have had all the circuits disconnected. Assuming the screw holes don't line up on the guts, I wouldnt hesitate on replacement.

 

Duct seal should go where the wall penetration is though(lb or meter base.)
not the bottom of the conduit.

 

I learned many years ago wiring large dust collectors and paint booths, that a air pressure difference as well as a temperature difference between inside and outside could cause large amounts of airflow through the conduit system.
Large airflow with a temperature difference at each end can make a huge amount of condensation inside the conduit, and in very short order under the right conditions.
I had jobs where a NEMA 4 large pushbutton enclosure totally filled with water in one weekend of operation.
Just from condensation alone, all of the conduit fittings were caulked from the outside with roofing caulk.
It taught me to never leave a conduit unsealed even for a short period.
If I didn’t have enough duct seal, at startup I would find a plastic bag to wad up and pack at both ends of the conduit, inside and outside, for a temporary seal till the system was proven good and totally functional.
Then the plastic bags could be easily pulled out and replaced with duct seal for a permanent fix.

same thing can happen with SE or SER service cable going from inside to outside, after having water pouring into a new main breaker, I learned to splay out the SE strands in the meter can and caulk the cable shut.
Lesson learned, and many future problems prevented.

 

Wow. Only 13posts ago we were talking about panel guts.

 

I think the server got a bit confused for a minute, when I made that post, it was showing new posts from 2011, and I couldn’t see the post I just made.

 

I'd think that NEC has something similar to this ?

1/4" hole drilled at the bottom of the LB outside where it enters in the building.

As Frankendodge said, the Ductseal should be outside.

 

We don't always have an LB at a wall penetration, many times in industrial situations the conduit passes straight thru the barrier wall or roof, and similar applies if your using SE cable or flexible seal tight conduit for a penetration. But if there is an LB or box, some drain or vent holes always makes practical sense. I always sealed both ends of s conduit run when there is a difference of air pressure or temperature at both ends.

 

Why?