That is correct HotLine1. A standard 4-square held in place by a locknut.
The job I am on right now provided two different outside fire alarm bells to pick from (probably a screw up). One of them was 120v and schematically showed that 120v being switched through the main flow switch. That is the type of box that I DEFINITELY can't imagine not being securely mounted.
In my view, the fact that the fire alarm panel will notify you of an open or short seems like a poor reason to allow an unsecured box. Should we also allow such workmanship for line voltages as long as the item in question is monitored/protected by both gfi and arc fault?
