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Alternating Current Disconnect Requirements for Photovoltaic Operation within California

With close to 500 authorities having jurisdiction (AHJs) in the state of California alone, it is often difficult to keep track of the preferential...

PV MODULES, Part 1 — What the AHJ Needs to Know,...

The Physics of the PV module. (Seasoned electrical authorities having jurisdiction (AHJs) may skip the section.) Photons (solar energy from sunlight) hit a PV module and...

Large-Scale PV Inspection Teams Planning for Success

Many years ago, I accepted a position working on a joint venture called KFM (Kiewit/FCI/Manson) to assist with the construction of a new bridge...

PV Power Plants

Large-scale PV plants have become commonplace in the desert southwest with plants routinely exceeding 100 MW in size. The largest plants in the U.S....

Ensuring the Safety of the Public: The Process of Inspecting PV...

The complexity of photovoltaic (PV) power systems dictates a careful and thorough inspection, starting with a detailed permit application and a plan review of...

Ensuring the Safety of the Public: The process of inspecting PV...

While large, utility-scale photovoltaic (PV) power systems account for more of the installed megawatts and gigawatts of PV power in the United States, the...

Article 705.12(A) — Point of Connection Supply Side Connections

I still remember the day when a fellow inspector tapped me on the shoulder and said: “Be ready to leave in 20 minutes; we’re...

SLEEKER, CLEARER, MORE UNDERSTANDABLE PV IN THE 2017 NEC — Part...

This article will continue our review of the significant changes in the 2017 NEC that relate to photovoltaic (PV) power systems. In the November-December...

Adventures in Inspecting Large Scale PV

If you were inspecting PV systems before publication of the 2008 NEC, you may have seen some interesting DC combiners (see photos 2 through...

Hot Topics for PV System Installations

With most of the United States now on the 2014 or 2017 National Electrical Code (NEC) several topics and enforcement questions are routinely being...
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