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Bonding bushing/jumpers are not required for raceways that enter a clean punch KO. See NEC 250.97 

MikeHoltNEC
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6 сен 2024

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Комментарии : 11   
@vince6829
@vince6829 Месяц назад
Thank you for sharing your knowledge
@keything8487
@keything8487 Месяц назад
this saved me a lotta work !!
@9111logic
@9111logic Месяц назад
Once again thank you, even though I am not part of the industry and I live in the UK, physics is always physics 🙏
@MikeHoltNEC
@MikeHoltNEC Месяц назад
I love physics. If you like videos on physics, watch MikeHolt.com/Fundamentals MikeHolt.com/Aux MikeHolt.com/GroundRod enjoy my Brother from another mother.
@9111logic
@9111logic Месяц назад
@@MikeHoltNEC I have watched most of your videos, especially those about multiple grounding electrodes and I have applied your rules to my self-built separately derived photovoltaic outbuilding. I might talk about this more with you by email. Once again thanks for all the precious info 🙏
@user-ih7cd7pj2l
@user-ih7cd7pj2l Месяц назад
why ref. the 277/489 when you have a 120/240 system? i thought 250.92(b) adressed the situation you have in your video?
@MikeHoltNEC
@MikeHoltNEC Месяц назад
the conductors in the nipple, are on the load-side of the service, so 250.97 would be the rule to read. If these conductors were service conductors, than 250.92(B) applies.
@brantsmith9932
@brantsmith9932 Месяц назад
Any conductor other than service conductor??? That wording confuses me
@MikeHoltNEC
@MikeHoltNEC Месяц назад
This video was about non-service raceways, 250.97. For service raceways, see 250.92.
@brantsmith9932
@brantsmith9932 Месяц назад
Thank you Mike, so if I have a 120-240 volt system in a service raceway and I punched a clean hole in it would it need a bonding bushing? Or say I have a 277/480 volt system coming into my service equipment with a clean hole punched in it would that need a bonding bushing?
@MikeHoltNEC
@MikeHoltNEC Месяц назад
@@brantsmith9932 That's a different topic/rule 250.92(B). Answer: You can use bonding bushing with jumper or bonding locknut (my preference) based on your example.
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