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  • Users: kply_231
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  1. kply_231

    Demand factor

    Does someone know reference to an international standard like IEEE or IEC that could help in determining the time period that should be used for calculating the demand factor of a motor? Also, does any standard allow applying demand factor to motor FLA's for voltage drop calculations? I am in...
  2. kply_231

    Training in API RP 505 standard

    Does anyone know if any institute provides training in API RP505 standard - American Petroleum Institute's recommended practice for classification of locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2?
  3. kply_231

    Adding an additional load to a MCC switchboard (verifying the capacity of busbar)

    Hello, I am trying to add an additional load to a MCC switchboard that has a bus bar rating of 800A. I want to verify if adding the load will lead to exceeding the capacity of the bus bar rating or not. I am in Canada and the code that I follow is Canadian Electrical Code part 1. Sum of the...
  4. kply_231

    Electrical naming standards in IEC

    Hi Does anyone know if there are any specific IEC standards which has guidelines for assigning tags/names to electrical symbols? For example, CB for circuit breaker, CR for relay contact, XF for transformer etc.? I referred IEC 61082 & IEC 60617 and couldn't find any specific information...
  5. kply_231

    Available bolted three phase short circuit current

    Hello I am conducting an arc flash study of a power distribution system using IEEE 1584. For calculating the arcing current, I need to determine what's the available bolted three phase short circuit current. How is this determined? Is it the utility that provides this parameter? Does this value...

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