Abstract: Methods for installing electronic connections into a Factory Mutual certified cabinet may comprise providing a double walled cabinet. The double walled cabinet ay comprise an outer cabinet wall, and inner cabinet wall, and an airgap between the inner cabinet wall and the outer cabinet wall. The method may comprise the steps of including a first large hole in a surface of the outer cabinet wall and including a first small hole in a surface of the inner cabinet wall. Methods can additionally include the steps of inserting a first bulkhead fitting into the first small hole in the surface of the inner cabinet wall via the first large hole and covering the first large hole in the surface of the outer cabinet wall. Methods may additionally include the first small hole at least partially overlapping the first large hole when viewed from a plane normal to the first large hole.