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NEC Article 230, Services

Let’s take a closer look at Article 230 and the NEC 2020 Code changes, which covers service conductors and equipment for control and protection of services.

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2020 NEC | Article 590, Temporary Installations

Because temporary electrical installations present a special set of hazards, they have their own Article in the NEC code. Read more to learn about how to safely reinstall previously used services, parts, or components in a temporary installation.

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Recruiting Water and Wastewater Operators: Tips for Future Employees

This article discusses why wastewater is a good career choice, what skills and knowledge an operator needs, and how to find your first job in the water/wastewater field. 

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Developing Troubleshooting Skills for HVAC Technicians

Troubleshooting of HVACR systems and equipment can often become a time-consuming, frustrating process. Here are some fundamental concepts that can help anyone become a more proficient troubleshooter.

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The Rebirth of Analog Video Surveillance

We’re currently experiencing a resurgence of analog surveillance systems. Here’s where analog systems can work better than internet protocol (IP) ones!

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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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NEC Article 230, Services

Most Recent

2020 NEC | Article 590, Temporary Installations

Recruiting Water and Wastewater Operators: Tips for Future Employees

Developing Troubleshooting Skills for HVAC Technicians

The Rebirth of Analog Video Surveillance

Recently in

Conductor Derating on a Rooftop Made Easy

Conduit and Cables Exposed to Sunlight on Rooftops

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