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Interrupt Current Codes and Surge Protective Devices (SPDs)

Transient Voltage Surge Suppressors (TVSS), also more commonly referred to as Surge Protective Devices (SPDs), have been applied as part of an overall power...

Working in Dangerous Proximity to Overhead High Voltage Lines – OSHA,...

There are two sets of rules for work in proximity of overhead high voltage lines: The rules for qualified persons and the rules for...

The Storage of Hazards

The excess space inside electrical supply stations (substations) is often considered for storage of construction materials. The National Electrical Safety Code® (NESC®) in Rule 110B2...

How Hot is That Wire?

The conductor temperature is a critical part of the design, construction, and checking clearances of aerial electric supply lines. Line Design In my article on "Overhead...

Grounding & Power Quality: The Best of Both Worlds

Many businesses are concerned these days with the cost of electrical energy supplying power to their facility, but an increasing number of them are...

An Inspector’s Most Common Hazardous Conditions

I spend a lot of time inspecting electric supply facilities for hazardous conditions and violations of the National Electrical Safety Code® (NESC®). Even when...

Substation Grounding

Not long ago I wrote an article on substation grounding for Electrical Business that raised the issue of whether one should interconnect the building reinforcing steel with the station ground electrode. A reader responded with the question of whether the best approach might be to ignore the rebar bonding.