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Old 06-17-2017, 09:18 PM   #1
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Default sizing neutral for 125 amp sub-panel

Is there any code on sizing neutrals? I am feeding a sub panel with a 125 amp breaker, #2 THHN. Length is 135'.
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Old 06-17-2017, 09:43 PM   #2
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The only requirement is that the neutral not be smaller than the equipment grounding conductor. Calculate the neutral size and go from there.
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