Air conditioning is a twentieth century phenomenon. The Romans had aqueducts. The British discovered electricity. The Americans had an engineer whose invention to control temperature and humidity changed the world forever — welcome to the air conditioner. As we rush through the routines of our daily lives, it’s amazing how quickly the seasons change; winter [...]
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Electromagnetic compatibility (EMC) is the ability of electrical / electronic equipment to operate in its installation environment while neither causing nor experiencing electromagnetic interference (EMI). EMI is any interference with normal equipment operation caused by abnormal energy entering the equipment either by conduction though wiring connections or by radiated wave reception. Radiated EMI is also [...]
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The purpose of electrical codes is practical safe guarding of persons and property from the hazards associated with electricity. Numerous prescriptive requirements address safety from the minimum standpoint. Codes and standards are the minimum rules for electrical safety, so one can easily surmise that for electrical safety one must do at least what is required [...]
(No Ratings Yet)The Canadian Electrical Code provides us with rules for connections to heat-producing electrical equipment such as lighting, motors and continuously loaded equipment. Here the code has some special requirements, including minimum wiring insulation temperature ratings, reduced conductor ampacities and minimum spacings to ensure that unwanted heat is dissipated and will cause no harm to associated [...]
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Overcurrent protection for electrical equipment can be accomplished by several different methods. The general rules for overcurrent protection of conductors and equipment are found in Article 240 of the National Electric Code. Section 240-2 indicates Article 440 shall be used for protection of air-conditioning and refrigerating equipment. In Part C of Article 440, specifically Section [...]
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Excerpted from the revised 4th edition of One- and Two-Family Electrical Systems, this article looks at the 1999 Code changes that affect air conditioning and heat pump 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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