Found this in a panel today. 3 or 4 breakers appear to be double tapped. They are HOM type Square D RT-500 breakers. Can these types have 2 connections?
What I notice right off the bat is that you have some Murray/Siemens breakers mixed in there too. RT-500 is not a Square D part number. Not sure where you got that.
In the first picture the breaker is not made for 2 wires but I can’t see the connection in the second picture.
This is what one looks like that accepts two wires:
Heck with the double tap…That looks remarkably like a Brown Recluse hanging above that red wire.
The multiple cables entering the knockout do not appear to have a connector on them.
The first pic, yes, double tapped. Second picture, no, not double tapped.
There is a double tapped neutral in the 2nd photo also.
I agree with both Jeff and Paul.
I believe your correct. Nasty biters 
I got the RT-500 number off of the breakers. And yes there are different brands of breakers in the panel. The panel is not marked so I do not know what type of panel it is.
both are double tapped…
That panel is ITE Semens.
Merci,Marc