Just wanted to share this well written article with photos of panel listings in regards when the use of Tandem breakers are allowed. Wanted to explain an issue with a client and through ASHI, I found this article that sums it up really nice.
Enjoy !
http://www.ashireporter.org/HomeInspection/Articles/Inspecting-Tandem-Circuit-Breakers/2047
That’s an old article…regardless, Reuben’s blogs are top notch, you should read them all.
Just reading the wiring diagram will show if tandems are allowed.