Bit_Bucket_07
Member
Does no one use metric screws?
If you intend to follow NFPA 79, then here are a few highlights to consider:
11.2.1.5 Threaded fasteners with machine threads shall be used to attach components to a subplate
11.2.5.1 Steel subplate thickness shall provide engagement of at least 2 full threads
11.2.1.5.4 Sheet metal screw, rivets, welds, solders, or bonding materials shall not be used to mount component to subplate
Exception: Rivets shall be permitted to be used for attaching mounting rails and wiring channels provided the exposed surface is smooth and free from any portion of a protruding stud.
The self drilling screws which are often used by electricians are typically sheet metal screws, therefore would not be NFPA79 compliant.
Pop rivets are more than adequate for DIN rail and wire duct, but I certainly wouldn't use them for mounting other components.