I know I'm going to take major hits for this, but I don't think the qualifications of the installer have any place in the NEC and believe such rules are outside the scope. These type of rules should be left to OSHA and have no place in the NEC. The inspector should only inspect the physical installation. If the installation is code compliant, who cares about the installers qualifications. Besides, there is no way that this type of rule could be enforced by an inspector.
Don(resqcapt19)
