Marina Ground Fault Protection, NEC 2020 - [555.35], (10min:38sec)
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- Опубликовано: 10 фев 2025
- This video is an extract from Mike Holt’s Understanding the 2020 National Electrical Code Complete Training Library. For more information about this product visit www.MikeHolt.c... or call 888.632.2633.
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![Grounding, Objectionable Current [250.6, 2020 NEC]](http://i.ytimg.com/vi/skX9XI3de5U/mqdefault.jpg)
Thank you so much for the information you share
The discussion at 8:30 is confounded by separate sections in the AEMC 565 clamp on Ammeter specifications for different ranges. The special design of this meter allows clamp measurements at 60 and 600mA full scale. eg 10mA reading on 60mA scale reads 10 +/-0.17mA. 100mA on 600mA scale reads 100 +/-1.7mA.
The key is that the clamp on Ammeter is clamped around all current carrying conductors so that the majority of the load current is cancelled and the only current measured is the ground fault. That means you can measure very low ground fault currents on loads limited only by the multiple conductors that need to fit in the clamp.
Your team is wonderfully entertaining. The comments back and forth between you and your team are worth the price of admission by themselves and then while I'm laughing I learn something. You can't get any better than that.
I'd like to know what route the fault current takes in escaping the vessel's electrical system? I know that the vessel's electrical system is not addressed at all by the US National Electric Code. Still I would love to know how the current escapes from the insulation of the vessel's electrical system and ends up in the water with sometimes deadly effect. Where does it get out of the electrical system and what route takes it out through the hull of the vessel. Tom Horne
Something I have absolutely no experience with, but a great video nonetheless. I'm trying my best to be a sponge and absorb any information I can
In some of the articles, the code refers to "corrosive conditions", which might be different than "corrosive environments" defined for art 680.
What would be a good source to determine these "corrosive conditions". I see nothing referenced in the NEC
Amazing question... all I 'got' is see 300.6(D) Note...
@@MikeHoltNEC thank you for the reply
So can I use a 60 feeder breaker at a shore pedestal to feed a 60amp mainlug panel with branch 10 circuits
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