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Two Buildings – Common Service, Grounding Requirements

A significant change occurred in the 2008 National Electrical Code (NEC) at Section 250.32(B) pertaining to the acceptable grounding methods at buildings or structures...

Transformer conductors and overcurrent protection

This article will focus on overcurrent protection and conductor sizing for low-voltage transformers. As a reminder, low voltage is defined in the Canadian Electrical...

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...

Visible Isolation of High Voltage Disconnecting Means

Why is visible isolation required for high voltage circuits? High voltage visible isolation has been required in Canada since the fifties. Visible isolation is the...

Electrical Safety for Motor Fuel Dispensing Facilities

Perhaps the number one rule in advertising is for your advertisement to be seen. Thus, it is no surprise that electronic advertisements are placed...

NEC vs. NESC: Understanding the World of Code

Rob and I have been friends for many years even though we were brought up on different sides of the tracks. By different sides...

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...

O Disconnect, Disconnect, wherefore art thou Disconnect?

Somewhat like Juliette looking for Romeo, PV installers and a few inspectors have trouble looking for, finding, and interpreting the numerous disconnect requirements in...

A Closer Inspection of the Growing Outdoor Power Trend

One of the biggest trends in the facility management industry is the desire for permanent power in outdoor spaces. People have smartphones on them at...

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....