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Rooftop Wiring Temperature — Field Installation Experiment

The rooftop temperature adders in NEC310.15(B)(3)(c) were first included in the 2008 NEC. The proposal to include this requirement was based on a study that showed...

Rooftop Wiring Methods and Temperature Correction

Since at least 1940, the National Electrical Code has contained a requirement for ampacity correction of installations subject to high temperature conditions. In the...

Industrial Control Panels for Roof Top Units

The electrical inspector has to verify the adequacy of SCCR of heating and cooling equipment at the location where it is installed; the electrical...

Case Study: Arizona Cardinals’ new state-of-the-art retractable stadium roof

As professional sports venues become bigger and more complex in design and scale, architects and engineers are looking for bold new ideas. Retractable roofs...
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