As stated above, yes. When used with PVC conduit and/or boxes, it doesn't matter.Are they 'rated' for bonding/grounding? I mean when used with metal conduit will they make a continuous path for faults?
I do something simular for KO's inside 4Ss inside walls that I want to fish to. Take a self-drilling rock screw, and use a guided screw tip braced against my linemans. Once the screw is in, pull in with a twist of the wrist to pull the KO in and out. (I really don't know why they are called knock outs - if they knock 'in'.... :rollFor enclosures already mounted where access is limited, From the inside I run 1 (or 2 about 1 inch apart) #12-#14 self drilling sheet metal screw(s) strategically placed in the innermost ko. A sharp blow at an acute angle usually does it.
Anyone have a good trick or technique on how to easily knockout concentric or eccentric KO's without taking more rings out than you want?
I know you are not using reducing washers with PVC, as they are not permitted to be used with PVC.