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Old 09-27-2017, 07:20 AM   #1
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Default Formula for calculating motor fusing.

Is there a formula for calculating fusing for 3 phase 480v motor loads

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Old 09-27-2017, 07:24 AM   #2
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Yes-- Table 430.52.....LOL
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Old 09-27-2017, 07:26 AM   #3
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Look up the load in Table 430.250 and then go to 430.52
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Old 09-27-2017, 07:28 AM   #4
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BTW, in most cases, you will be using an inverse time breaker
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