Now that industrial GFCIs are here, inspectors have a proactive option...

UL Class A ground-fault circuit interrupters (GFCI) began to be required in kitchens, bathrooms and outdoor outlets in the early ’70s, and have saved many...

Behind the Meter Cover

Think you might know what lurks behind the meter cover? Chances are you will think twice after reading this article! Electrical Metering Devices Meter enclosures are...

5 Methods of Protection

All three elements of the fire triangle — oxygen, ignition source, and fuel — must be present simultaneously and in specific quantities for a...

Appreciating Hazardous Areas

It was the turn of the century and after thirteen years working on the utility side of the transformer I took on the role...

How to Determine Short-Circuit Current Ratings

It’s important to understand short-circuit current ratings (SCCR) for industrial control panels. Industrial control panel is a general term that describes an assembly of two or...

Smart Meter Numbers, Benefits Expanding

The term smart meter is becoming much more common around the country. These new digital meters for recording electricity use are replacing the traditional...

A Critical Look at Load Side Utility-Interactive PV Inverter Connections 690.64(B)...

The NEC in sections 705.12(D) / 690.64(B) allows utility-interactive photovoltaic inverters to be connected on the load side of the service disconnect. This requirement...

Utility Interconnections and Code Requirements

Inspectors and installers continue to puzzle over the requirements in Section 690.64 of the National Electrical Code (NEC) that apply to the connection of...

Supply-side PV Utility Connections

Many larger PV systems cannot meet the requirements for a load-side (of the service disconnect) connection to the premises wiring system and a supply-side...

Making the AC Utility Connection

Connecting the utility-interactive inverter to the utility grid properly is critical to the safe, long-term, and reliable operation of the entire system. The ac...