...where either the small knockout can be removed and a No. 4 inserted into the hole or the larger knockout can be removed with a connector installed and then the No. 4 inserted into the connector and tightened down...
The choice seems to be evident.
What about the lone 1/4" KO without an outer 1/2" KO around it?
[This message has been edited by sparky66wv (edited 09-24-2002).]
-Virgil Residential/Commercial Inspector 5 Star Inspections Member IAEI