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The National Electrical Code

The first electrical codes were written in the late 1800’s by various associations, including the New York Board of Fire Underwriters and the National Board of Fire Underwriters. Eventually, the National Fire Protection Agency was established and National Electrical Code was born. Have you ever thought about who writes the […]

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Iowa Electrical Continuing Education Virtual Instructor-Led Training (VILT)

Get 4 hours of electrical continuing education for Iowa – Join us from the comfort of your own home for a continuing education webinar covering 2020 NEC Changes.

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Mitigating Flooding Impacts on Drinking Water Treatment Systems

We’ve talked in the past about how drought conditions can negatively impact drinking water systems. However, to the inverse, there are also problems and challenges caused by an overabundance of water flooding a system. This article will reveal how flooding can negatively impact drinking water treatment systems. It will also […]

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Basic Surface Water Treatment

Surface water treatment is used to prepare water collected from streams and lakes for human and industrial consumption. The chief mission is to protect human health, eliminating harmful organisms and chemicals before the product is distributed. The facilities used have had different names over a couple of centuries and some […]

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Following the Footpath to Next Generation 911 Communications

“911, do you need Police, Fire, or Medic? Please hold.” Then, “where are you calling from?” These are words that no one wants to hear in the middle of an emergency. Anyone who has had to call 911 wants immediate service with emergency services onsite right then. When most people […]

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Conductor Derating on a Rooftop Made Easy

Derating conductors for the environment where they are installed is an important consideration for selecting the type and size of conductor for a particular installation. When installing a system on a rooftop, special consideration must be given to the ambient temperature inside the wire way or conduit that contain the conductors to prevent heating beyond the rating of the insulation of the conductors.

Conductors installed in raceways on rooftops can be subject to higher temperatures than they would be just from the heating effect of solar energy absorbed by the wall of the raceway. This effect becomes more evident when the proximity is very close to the roof or the raceway is in contact with the roof surface.

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Conduit and Cables Exposed to Sunlight on Rooftops

Anyone who has been on top of a roof on a hot summer day knows what it’s like to stand in the middle of an oven. Extreme temperatures from the sun can bake everything in sight, from shingles to appliances, and even electrical conductors and conduit.
Conductor insulation is meant to provide long lasting protection from expected heat due to the flow of electricity and normal environmental factors. However, excessive heat from solar radiation can damage conductors and cause premature failures.

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The National Electrical Code

Most Recent

Iowa Electrical Continuing Education Virtual Instructor-Led Training (VILT)

Mitigating Flooding Impacts on Drinking Water Treatment Systems

Basic Surface Water Treatment

Following the Footpath to Next Generation 911 Communications

Recently in

Conductor Derating on a Rooftop Made Easy

Conduit and Cables Exposed to Sunlight on Rooftops

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