What is this type of switch called?

[kensetsu]

Incidentally, this is the definition suggested by the NEC. National Electrical Code. There may be others that define ganged differently.

 

[kensetsu]

The National Electrical Code was first published in. 1895 and covered the fundamentals of of ganged switches. That's right! You guessed it. I have a bunch of electrician friends and worked with one for a couple of years in high school and college.

 

[Gordy]

What is this type of switch called?

During my training we used to call them "Ganged push-button selector switch with exclusive interlock".

So you push one switch and the previously selected switch pops out.