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The NEC in sections 705.12(D) / 690.64(B) allows utility-interactive photovoltaic inverters to be connected on the load side of the service disconnect. This requirement has been in the Code since the late 1980s when PV Article 690 first appeared. Except for a slight change in 2008, the requirement has been largely unchanged. A critical examination of the requirement and how it can be applied as well as various proposals that have been rejected over the years may yield insights on what is needed in the future.
The electrical inspector has to verify the adequacy of SCCR of heating and cooling equipment at the location where it is installed; the electrical engineer designing the electrical distribution system has to assure that the engineer specifying heating and cooling equipment specifies equipment (integral industrial control panel) with an adequate SCCR; and the manufacturer needs [...]
Series combination ratings are utilized to attempt to save money on some jobs. This article presents a simple checklist that can be completed by the contractor and/or designer when series rated combinations are proposed. The checklist is designed to be a single sheet that is double sided. The front side requires information for a specific [...]
