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New NEMA Engineering Bulletin would be a valuable adjunct to photovoltaic (PV) training

New NEMA Engineering Bulletin would be a valuable adjunct to photovoltaic (PV) training

Recently, UL in conjunction with several North Central Texas inspection authorities held a one-day training session on photovoltaic and supporting emerging technologies, including panel discussions on electrical requirement. As more of these training sessions are conducted around the country, UL should consider including as a handout, the newly posted NEMA Engineering Bulletin 103, Photovoltaic Wiring Methods. This Bulletin offers a…

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Siting Transmission Corridors: A Real Life Game of Chutes and Ladders*

Siting Transmission Corridors: A Real Life Game of Chutes and Ladders*

Oh, for the simplicity of Chutes and Ladders! In the massive effort to attain energy independence by connecting vast renewable energy resources with energy-hungry population centers, power transmission lines are both the obstacles and the solution—the chutes and ladders—to success. Everyone wants to harness the energy from wind, sun, earth, and tides, but moving it can be tricky. Transmission corridors…

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AWG Wire Sizing System goes Global

AWG Wire Sizing System goes Global

On September 29th 2009 the IEC published IEC/TR 62602 Conductors of insulated cables – Data for AWG and KCMIL sizes.     The informative publication completed the first of several stages in a process initiated by NEMA members to ultimately produce a normative IEC standard for both metric based and N. American sized conductors.   A good reason to celebrate this important achievement…

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