This is in reference to "Double tapped circuit breakers" in main panel (North America).
In reference to more than a single wire on circuit breakers not designed for that.
In House Home Repair. dot com one reads .................
"So what can you do? If you aren't having any problems with the circuit being over-loaded the fix is really simple assuming the two wires are the same gauge. Simply disconnect them from the breaker, add a pig-tail of the same gauge wire, connect the three wires together and secure the pig-tail to the breaker. A splice inside the box is allowed and you now meet code and have satisfied the home inspector for about a dollar.
But haven't we read here that pig tailing within the circuit breaker panel is not to code? Or not to SOME codes?
We happen to have Square D breakers in three panels; main and two pony. And, seemingly, for 40 years no problems at all! And with occasional changes over the years and to re-balance loads between Leg and leg B etc. I'm sure there is the odd pigtail or two!
Just curious?