Pigtails in Panelboards
- Thread starter lizzie14
- Start date
- Status
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Pigtails in Panelboards
It is fine. See 312.8
It is fine. See 312.8
- Location
- Lockport, IL
- Occupation
- Retired Electrical Engineer
Re: Pigtails in Panelboards
Are you also upsizing the equipment grounding conductor? A 30 amp load would normally only need a #10 conductor (10,380 circular mils) and a #10 EGC as well. A #4 has an area of 41,740 circular mils. That is an upsize of the ungrounded conductors by a factor of 4.02 You need to upsize the EGC by that same ratio of area, which means you need a #4 EGC (the math is easy when the ungrounded and EGC start out as the same size). Reference 250.122(B).
Are you also upsizing the equipment grounding conductor? A 30 amp load would normally only need a #10 conductor (10,380 circular mils) and a #10 EGC as well. A #4 has an area of 41,740 circular mils. That is an upsize of the ungrounded conductors by a factor of 4.02 You need to upsize the EGC by that same ratio of area, which means you need a #4 EGC (the math is easy when the ungrounded and EGC start out as the same size). Reference 250.122(B).
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