Electrical Safety

NEC 2020 Updates Impacting Electric Shock Hazards

The 2020 edition of the NEC addresses many of the electric shock hazard concerns addressed by the 2017 edition and subsequent Tentative Interim Amendments (TIA)s concerning electric-shock drowning (ESD).

Calculations Central


PV Installations for the 2020 NEC

Let’s take a look at some of the more significant changes impacting photovoltaic (PV) installations once the 2020 National Electrical Code (NEC) is validated by the NFPA Standards Council.

PV Systems Math — Sample Calculations

Looking at the PV array in a PV system, many installers and inspectors are confused by new system voltage calculations that may be required by the Code specific to PV...