Hi all:
In the main breaker panel in my house, one of the larger cables (100A to sub in detached garage) exits though the bottom. The "installer" used a PVC bushing as a strain relief in the knockout, so there is no clamp. Also, the knockout used has a couple of larger-sized, concentric rings remaining, one of which has broken loose from the bottom of the panel. The result is that the cable passes through a plastic bushing that is just hanging onto the edge of a too-large hole in the bottom of the panel. There is nothing to keep this from falling through the hole and allowing the cable to chafe against the sharp metal edge of the panel knockout.
The only strain-reliefs I am familiar with are the metal ones that use a conduit nut on one side and a two-screw clamp on the other. I would like to replace the existing bushing with a proper clamping strain- relief of the correct size for the hole, but this will require disconnecting the circuit from the breaker and cutting an access hole in the wall below the panel. The wall has a complex hand-painted design that I would like to preserve. Access from the other side of the wall is possible, but presents it's own set of problems. Does anyone make a strain-relief that can be assembled around the cable and clamped into the hole from the inside of the panel? Thanks in advance.
Regards, John.