Article 250.92(A)(2) of NEC-2005 requires bonding between service enclosures. I have a meter base can with the grounding electrode conductor connected to the neutral lug going to the grounding electrode. I have a single-phase three-wire service conductor system feeding from the meter can to the service-disconnect panel. The meter base can and the service-disconnect panel [...]
(1 votes, average: 4.00 out of 5)For a 200-amp load center used for feeding charging equipment that is approximately 400 ft from main switchboard, what size of bonding wire is required? — T. C.
(No Ratings Yet)When using a 90°C single conductor in an ambient temperature of 81°C – 89°C, what is the correction factor for this application? It is presumed once the temperature reaches 90°C the conductor has met or exceeded its rating. Is there ampacity present in this conductor at 85°C, however minimal it may be? There is no [...]
(3 votes, average: 5.00 out of 5)
Abstract A variety of different electrodes is used for providing effective and safe electrical grounding. The ability of these electrodes to resist corrosion determines their useful service life. Copper-bonded steel and galvanized steel electrodes have been used for decades yet there is still much debate regarding the relative corrosion performance of each type of coating [...]
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Today, the solar industry and markets are experiencing record growth. Many states, utilities and the federal government are offering lucrative incentives for the installation of solar energy systems. Numerous companies and individuals are seeking to enter the business as manufacturers, financiers, distributors, integrators, marketers and installers. However, not all have the requisite training, experience and [...]
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Photovoltaic (PV) systems will be producing hazardous voltages and currents for 50 years or more. Over that period of time, they may or may not be operational and they may or may not be maintained. Proper grounding of all exposed metal surfaces in the system that may be energized by internal faults, poor terminations or [...]
(1 votes, average: 3.00 out of 5)
A significant change occurred in the 2008 National Electrical Code (NEC) at Section 250.32(B) pertaining to the acceptable grounding methods at buildings or structures supplied by a feeder or branch circuits from a grounded service located at another building or structure supplied from a common service. In this article, we will take a closer look [...]
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Feeling dim from energy code confusion? Read on to give your inspections a charge. The U. S. Department of Energy’s Building Energy Codes Program addresses hundreds of inquiries from the energy codes community every year. This article offers clarification for topics of confusion submitted to BECP Technical Support that are of interest to electrical inspectors, [...]
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The ’70s energy crisis A little before the ’70s energy crisis, Peter, Paul and Mary suggested in their famous song, “The answer, my friend, is blowing in the wind.” Today we realize that wind is a valuable resource we cannot ignore, but wind energy is just one piece in the pie. To fix this energy [...]
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Energy Safe Victoria has identified segments of the industry for additional attention following audits of lift installations and discussions with companies and workers. Lift installation techniques have changed in recent years with the innovation of a type of elevator commonly known as a Motor Room Less lift (MRL). MRL type of lift differs from [...]
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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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