PV ac system output currents for the larger systems are usually too high for connection on the load side of the service disconnect and must be connected on the supply side of the service disconnect. The NEC allows such connections, but the existing service must be examined carefully to determine where the connection can be made and what type of equipment must be used to make the connection.
The concept of the receptacle has been largely unchanged since the first National Electrical Code® (NEC®) in 1897; by the 2017 edition, it will have been 120 years.
In an effort to increase the production of the residential PV system, the original contractor installed additional modules; no permit was obtained.
This article summarizes the actions and reporting processes required to achieve good results in field evaluations for new, used, and unlisted/uncertified electrical equipment.
Considering the complexity of the PV systems and the environment in which they operate, electrical inspections of PV systems is no easy task for the AHJ.
A new safety standard in Canada for photovoltaic combiners has been developed known as CSA Standard C22.2 No 290 Photovoltaic Combiners. The 2015 Canadian Electrical Code Part I (CE Code) defines a photovoltaic combiner as...
With the rapidly growing commercial use of 3D printers to make parts, manufacturers still unfamiliar with this technology need to know its advantages and drawbacks compared to injection molding.
I have spoken with building department officials who have seen an increase of five to ten times in solar permit applications over the last few years. It is a tough task for them to keep up with the volume with no increase in budget or resources.
Photovoltaic power systems, like other electrical power systems, require overcurrent protection for conductors, bus bars, and some equipment.