On 11/06/18 12:08, Fredxx wrote:

Do conventional junction boxes have any strain relief? Most rely upon
the screw terminals directly on the wire to keep things in place.

I didn't think strain relief was a requirement for fixed wiring?

Normally you would clip the cable near where it enters the JB. But that
assumes the JB is fixed - many are just floating around in ceiling voids
and to be fair, under those conditions it's unlikely to get a cable yanked.