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.
A firm understanding of the basic principles associated with series and parallel circuits is a sufficient background to begin an investigation of any single-source DC network having a combination of series and parallel elements or branches.
NEMA's Guide SG 20-2013 enhances electrical safety awareness and mitigates electrical hazards to those servicing and maintaining switchgear.
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.
The information we received from our 2016 membership survey is instrumental in helping us understand how members view the association and its services.
To play this quiz about equipment requirements in the 2014 NEC, you need a sharp eye, a quick mind and a 2014 National Electrical Code book.
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.
Service-entrance equipment can present unique challenges when it comes to proper application of electrical equipment. The service point is the point of demarcation between utility and premise wiring.
Selective coordination is often referred to simply as coordination. Coordination is defined in NEC® 240.2 as: “The proper localization of a fault condition to restrict outages to the equipment affected, accomplished by the choice of selective fault-protective devices.”