Weird GFCI switch issue

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MAC702 said:
How are you saying this will be sensed as a ground fault? The neutral DOES pass through the GFI sensor. It HAS to. Otherwise, they wouldn't provide the neutral conductor, and these would not be used for 120/240V equipment.
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Load side hot of CB to the Neutral BUSS BAR in the panel. Will trip.

Test of load hot to load neutral both on the CB should not trip.
 
MAC702 said:
How are you saying this will be sensed as a ground fault? The neutral DOES pass through the GFI sensor. It HAS to. Otherwise, they wouldn't provide the neutral conductor, and these would not be used for 120/240V equipment.
Click to expand...

The neutral current must pass through the GFCI breaker along with the hot let current. If the neutral current does not the GFCI breaker senses that it has hot leg current going out but do not have the same neutral current coming back. So, lets trip the breaker.

If a load of any kind that draws more than 4mA across the hot leg and another body will trip the GFCI. However, if you connect the load to the hot and the neutral screw that is on the breaker the GFCI will not trip. But if you connect the load to the hot leg and the neutral buss bar the breaker will trip.
 
Can also trip GFCI by passing current (over 4-6 mA) between an ungrounded conductor and the GFCI protected neutral conductor.

Example - test with solenoid tester between panel ungrounded bus and the load side neutral terminal of a GFCI breaker.
 
MAC702 said:
I totally misread your earlier post and was picturing some kind of neutral terminal block in the hot tub. Sorry.
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OP's tub wasn't there yet, he was just checking things out at a junction box to make sure what was installed so far was working.

He either wasn't aware of what points he tested to, had something connected wrong, has a defective GFCI, or some unexpected reaction to inductive kickback of his solenoid tester, though the last one don't seem too likely it can't be completely ignored either.
 
Follow up to my original problem

Follow up to my original problem

So, it has been a while since I was able to return to this job. The installers forgot to measure the door opening to the enclosed porch and the tub didn't fit. Had to wait on a new tub that did fit.

Using this GFCI disconnect: https://www.lowes.com/pd/Eaton-50-Amp-Metallic-Spa/50416388

I verified all of my wiring was correct. When I tested with my digital multi meter, it did not trip. Again I used my old solenoid tester and it tripped the GFCI switch (which actually looks like a circuit breaker).

Testing with solenoid tester at the actual GFCI switch: Test any hot to neutral - no trip. Test Hot to Hot - no trip.

Testing with solenoid tester at the other end of 25 feet of sealtite and #6 AWG: Test any hot to neutral - no trip. Test Hot to Hot - TRIP.

Testing with Digital Multi meter at the actual GFCI switch: Test any hot to neutral - no trip. Test Hot to Hot - no trip.

Testing with Digital Multi meter at the other end of 25 feet of sealtite and #6 AWG: Test any hot to neutral - no trip. Test Hot to Hot - no trip.

I connected the hot tub to my wiring and it seems to be working fine now.

I'm not sure what was going on.
 
dhalleron said:
So, it has been a while since I was able to return to this job. The installers forgot to measure the door opening to the enclosed porch and the tub didn't fit. Had to wait on a new tub that did fit.

Using this GFCI disconnect: https://www.lowes.com/pd/Eaton-50-Amp-Metallic-Spa/50416388

I verified all of my wiring was correct. When I tested with my digital multi meter, it did not trip. Again I used my old solenoid tester and it tripped the GFCI switch (which actually looks like a circuit breaker).

Testing with solenoid tester at the actual GFCI switch: Test any hot to neutral - no trip. Test Hot to Hot - no trip.

Testing with solenoid tester at the other end of 25 feet of sealtite and #6 AWG: Test any hot to neutral - no trip. Test Hot to Hot - TRIP.

Testing with Digital Multi meter at the actual GFCI switch: Test any hot to neutral - no trip. Test Hot to Hot - no trip.

Testing with Digital Multi meter at the other end of 25 feet of sealtite and #6 AWG: Test any hot to neutral - no trip. Test Hot to Hot - no trip.

I connected the hot tub to my wiring and it seems to be working fine now.

I'm not sure what was going on.
Click to expand...

That is a GFCI breaker in that disconnect, not that it just looks like one, it is one.
 
Little Bill said:
That is a GFCI breaker in that disconnect, not that it just looks like one, it is one.
Click to expand...
For some reason I thought it was just a disconnect switch with gfci protection. The product description does say breaker now that I looked again.

Sent from my SM-G930V using Tapatalk
 
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