Electric Grounds2

Electric Grounds2 - Electrical Grounds By: Professor Wilmer...

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Electrical Grounds By: Professor Wilmer Arellano
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Overview Glossary References Definitions Measuring Soil Resistivity Recommendations FPL IEEE 142 Humming a Noise Example IEEE 1100 Printed Circuits Electrical Noise Special Applications
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Glossary NEC, National Electric Code IEEE, The Institute of Electrical and Electronics Engineers
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References NEC, National Electric Code http://www.fpl.com/ http://www.epanorama.net/documents/groundloop/ind http://www.leminstruments.com/grounding_tutorial/htm System Design and Layout Techniques for Noise Reduction in MCU-Based Systems. By: Mark Glenewinkel. CSIC Applications, Austin Texas. MOTOROLA AN1259 EEL 4010 Senior Design 1 Booklet
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Definitions. NEC Wiring system ground. This consists of grounding one of the wires of the electrical system, such as the neutral, to: Limit the voltage upon the circuit which might otherwise occur through exposure to lightning or other voltages higher than that for which the circuit is designed. Another purpose in grounding one of the wires of the system is to limit the maximum voltage to ground under normal operating conditions. Also, a system which operates with one of its conductors intentionally grounded will provide for automatic opening of the circuit if an accidental or fault ground occurs on one of its ungrounded conductors (Fig. 250-1).
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Definitions. NEC
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Definitions. NEC Equipment ground. This is a permanent and continuous bonding together (i.e., connecting together) of all non current-carrying metal parts of equipment enclosures—conduit, boxes, cabinets, housings, frames of motors, and lighting fixtures—and connection of this interconnected system of enclosures to the system grounding electrode (Fig. 250-2). The interconnection of all metal enclosures must be made to provide a low-impedance path for fault-current flow along the enclosures to assure operation of overcurrent devices which will open a circuit in the event of a fault. By opening a faulted circuit, the system prevents dangerous voltages from being present on equipment enclosures which could be touched by personnel, with consequent electric shock to such personnel.
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Definitions. NEC
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Measuring Soil Resistivity
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Measuring Soil Resistivity The measuring procedure described below uses the universally accepted Wenner method developed by Dr. Frank Wenner of the US Bureau of Standards in 1915.
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Electric Grounds2 - Electrical Grounds By: Professor Wilmer...

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