Hey Folks, This is a setup I’ve never seen. I’ll look things up when I’m back in my office, but I’d like to get the Electrical folks comments.
This Load Center looks like a Split Bus design, but the main lug has a pigtail to a 100 Amp Main Breaker that’s installed. Condominium built in 1973. I appreciate your comments
It is wrong. It is double lugged. The “pigtail’s” need connected to a 100 breaker.er
Agree with Roy but it’s also interesting that what they’ve done makes absolutely zero sense. The breakers on double-tapped wires are now back-fed and fed from the bus.
Agreed. A double tapped lug is always a callout for a licensed electrician and it appears like it could be a 200 Amp Split Bus panel (except the 100 Amp that pigtailed to the lug). From appearances, I’m guessing this configuration is original to the home (1973) and I have a queasy feeling that all the condominiums in the complex are the same.
Dont you know they are trying to get twice as much amperage? 
Just curious what the rest of the panel looks like. Do you have a photo of the entire panel?
Here’s a couple more photos. I don’t typically take a wide view of the entire panel with the dead front removed, but maybe I should start doing that.
Thanks!
Yep, good idea. Also take a picture of the panel label and directory. Helpful information right here and probably more out of frame.
If it’s a split bus, I am not seeing what would be feeding the bottom half.
From the photo’s it doesn’t appear to be a split bus. You would need more photo’s of the 100 amp breaker to confirm what is actually going on. That appears to be some version of an obsolete SQ D Q1 2100 2 Pole 100 Amp breaker.
The breaker could be a cable in , cable out design, & not even connected to the panel’s bus stabs based on the strange way it is wired.
No, it isn’t fed by the bus. It’s a feed-through breaker.
Tapped twice and AL/CU mixed metal under main lugs.
