Transcription of Voltage Drop Calculations - Cooper Industries
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Voltage Drop Calculations - Cooper Industries
199 2005 Cooper BussmannVoltage drop CalculationsRatings of Conductors and Tables to Determine Volt LossWith larger loads on new installations, it is extremely important to consider voltloss in mind, otherwise some very unsatisfactory problems are likely to actual conductor used must also meet the other sizing requirements such asfull-load current, ambient temperature, number in a raceway, to Figure Volt LossMultiply distance (length in feet of one wire) by the current (expressed in amps) by thefigure shown in table for the kind of current and the size of wire to be used, by one overthe number of conductors per , put a decimal point in front of the last 6 digits you have the volt lossto be expected on that 6 AWG copper wire in 180 feet of iron conduit 3 phase,40 amp load at 80% power feet by amperes: 180 x 40 = 7200 Multiply this number by number from table for 6 AWG wire three-phase at 80% power factor: 7200 x 745 = 5364000 Multiply by1 5364000 x 1 = 5364000#/phase 1 Place decimal point 6 places to gives volt loss to be expected: (For a 240V circuit the % Voltage drop is x 100 or ).
©2005 Cooper Bussmann 199 Voltage Drop Calculations Ratings of Conductors and Tables to Determine Volt Loss With larger loads on new installations, it …
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