Section 10 of the Canadian Electrical Code, Grounding and Bonding, is probably the least well understood section of the electrical code, but it is one of the most important. Opinions abound on the absolutely correct interpretations. But almost everyone will agree that correctly installed grounding and bonding is most critical to a safe electrical installation. [...]
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The National Electrical Safety Code (NESC) in Rule 110A1 describes the type of enclosure necessary to surround an electric supply substation. “Rooms and spaces in which electric supply conductors or equipment are installed shall be so arranged with fences, screens, partitions, or walls to form an enclosure as to limit the likelihood of entrance by [...]
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Interpretation of Soil Measurements After completing the soil resistance measurements at the proposed substation site, the next step is the development of a mathematical equivalent soil model that is a good approximation of the actual soil resistance data. The most common models are the uniform soil model and the two-layer soil model. The uniform soil [...]
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The almost two hundred pages and ninety five equations of IEEE Standard 80-2000 provide a well explained procedure for the design of safe and practical grounding systems for electric substations. There are two objectives of a safe grounding system as detailed in Clause 4.1: “To provide means to carry electric currents into the earth under [...]
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I have written several times in the IAEI News about the hazards associated with substations and some of the easy ways to understand NESC requirements for substations. In my November/December 1997 article titled “A Substation is Not Just a Fence,” I discussed the fallacy of using a fence as a quick and inexpensive fix to [...]
(1 votes, average: 5.00 out of 5)In this article, we will review the measurements needed to ensure that substation grounding resistance and resistivity are low, so we can be sure that people are able to work safely in and around an outdoor station. The Canadian Electrical Code, Rules 36-302, 36-304, and 36-306 require that the grounding design of outdoor substations over [...]
(No Ratings Yet)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 prohibits storage inside an electrical supply station even when stored well away from the energized conductors and equipment. The only exception is the storage of minor parts essential to the [...]
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I spend a lot of time inspecting electric supply facilities for hazardous conditions and violations of the National Electrical Safety Code® (NESC®). Even when I’m on vacation, I don’t stop inspecting. I’ve shared the “problems” with my wife so often that now she points them out to me. I’ve driven all over the United States [...]
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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.
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IAEI, as the keystone of the electrical industry, is a membership driven, non-profit association promoting electrical safety throughout the industry by providing premier education, certification of inspectors, advocacy, partnerships and expert leadership in Electrical Codes and Standards development.
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