Grounding a 4" Square Or A Switch Box With Ground Clips To Edge ?

[Robert11]

Hello:

Regarding grounding of a J Box, or a 4 inch square, or 2 inch switch box:

Are those "squeeze / compression" clips that hold the ground wire to the edge of the box (rather than using a screw to the box) acceptable ?

Are they Code compliant ?

Thanks, B.

[RBM]

If they are U.L. approved for the purpose... Yes