In order to truly understand the implications of the changes to the measuring provisions of Section 210 in the 2020 National Electrical Code (NEC), one must go back and review how we arrived at that point.
A PV system is relatively simple in concept, but after the NEC requirements are added for safety, the execution of the system requires considerable attention to detail. There are also significant numbers of electrical inspectors that are new to the field of inspecting PV systems.
The 2020 version of the NEC just took a leap forward for at least one of these two locations with changes to a rule that has been a long-standing requirement for many years – the six (6) disconnect rule found in 230.71.
Electric utilities face the challenge of managing aging and unsupported legacy automation and monitoring equipment at their substations and pole-tops. This equipment is critical for accessing data from intelligent electronic devices (IEDs) for measurement and protection, automating key functions and enabling remote users to securely control power-system devices.
Our role as inspectors plays a vital role in assuring that homeowners and the public are safe from electrical hazards. Being an informed inspector by knowing what the NEC says and why changes occur is critical to your continued role in this process.
Although changes to the 2020 National Electrical Code for PV systems have been covered in previous issues, this article compares the 2017 requirements with the 2020 requirements and determines how clarifications have been made.
Kitchen islands have been getting bigger and bigger for years. How big does the island need to be to require more than one receptacle outlet to be installed? The 2020 NEC requirements answer that question.