Section 250.64(B) states where exposed and on a surface, a grounding electrode conductor should be protected. If I sleeve an 8 AWG GEC in rigid nonmetallic conduct from the service panel to the crawl, do I have to protect the GEC in the crawl, or is it ok to run the GEC on the bottom [...]
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The year was 2005. It was a typical spring afternoon in this typical Midwest town of Anywhere, USA. The skies were a cloudy gun-barrel gray as the light rain fell and the thunder rolled in the distant background. Suddenly, without warning, the rain intensifies and the skies turn darker and darker. That distant thunder is [...]
(No Ratings Yet)A great deal of wisdom and experience go into writing the rules of the Canadian Electrical Code; however, the reasons may not always be clear to its users and sometimes we’re not completely satisfied to follow the rules without understanding the reasons behind them. This article reviews several rules from Section 10, Grounding and Bonding, [...]
(No Ratings Yet)The Canadian Electrical Code defines a grounding electrode as: “a buried metal water-piping system or metal object or device buried in, or driven into, the ground to which a grounding conductor is electrically and mechanically connected.” In other words, it’s whatever metal objects the code allows you to drive into or bury in the earth [...]
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When choosing a grounding electrode for an installation, it is important to consider the level of protection required for the application and the design life of the building. Merely complying with the National Electric Code is not always sufficient. Electrical System Grounding Requirements Electrical power distribution systems are typically required by the designer to have [...]
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Clean power is the objective, but what about noise on the equipment grounding conductor and other grounding paths? How “clean” is your isolated (insulated) equipment grounding circuit? Chances are if you’ve been involved in the electrical field, you’ve had experiences either installing or inspecting isolated (insulated) equipment grounding circuits and receptacles. Clean power is not [...]
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There are several misconceptions with interpretation of the National Electrical Code as it relates to ground rod electrode compliance. The section of the NEC that deals with ground rods is 250.52. The wording of this portion of the Code presently includes conflicting terms, dimensions and interpretations, which hopefully will be addressed in the next code [...]
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Electrical Shock An estimated 58 people lose their life each week as a result of electric shock. In an electrical system, the grounding and bonding system is the primary protection against electrical shock hazards. It provides a low resistance path to ground to protect against electrical faults. The effective ground-fault current path ensures facilitation of [...]
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There is a lot of confusion on the use and application of galvanized ground rods due largely to the fact that there has not been a comprehensive specification document from which to manufacture or inspect this product for minimum Code compliance. For years a hot-dip galvanized ground rod electrode has met either the ANSI C135.30 [...]
(No Ratings Yet)
Electrical systems and non-current-carrying metal parts of equipment in an electrical installation generally are required to be grounded; however, alternatives are given within the NEC that relax the grounding rules for equipment. These alternatives include isolation, insulation, or guarding as methods of providing equal and effective safety measures without grounding the metal parts or equipment. [...]
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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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