J Jimmy7 Senior Member Location Boston, MA Occupation Electrician Oct 31, 2025 #1 Is it permissible to drill a hole in an existing interior cinder block wall and come in the back of a 4” square with MC cable?
Is it permissible to drill a hole in an existing interior cinder block wall and come in the back of a 4” square with MC cable?
infinity Moderator Staff member Location New Jersey Occupation Journeyman Electrician (retired) Oct 31, 2025 #2 Yes.