It is generally understood that the Authority Having Jurisdiction (AHJ) is responsible to evaluate and approve electrical equipment installations. These responsibilities are largely assigned to the AHJ by paragraph 110.2 of the National Electrical Code (NEC). It says that equipment is acceptable only if approved, where approved means “acceptable to the AHJ.” Of course, there are many distinctions, exceptions and deviations. But, still, as a general rule in the United States, it is the AHJ (typically the local electrical inspector) that carries out this responsibility. And it is not trivial. The liability associated with electrical safety can be enormous, and the amount of knowledge required to enforce equipment safety can be overwhelming.