Is there some sort of small clamp that would serve the purpose of making a secure connection to the ground bundle (3 bare copper wires from 12-2 NM-B cable)? I've never seen a switch grounded ...

The new 4” square clamp is tin-plated and has two wire grooves ... for direct burial in Earth or concrete. This heavy duty connector is another application solution found in The Grounding Superstore.

These clamps are ideal for high-pressure connections where leakage is a concern, providing a more secure connection than standard plastic securing clamps. Qosina’s line of Oetiker ® StepLess ...

The UL Listed, Strong Cap was developed by Strong Cap, LLC of Omaha, Nebraska as a solution for poor grounding connections for all electrical industries. Including, but not limited to ...