fred trueblood
Member
- Location
- elizabeth city n c
I have removed all wiring to low voltage and still get same problem
gfi tripping for boat lift new construction
- Thread starter fred trueblood
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- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
If you are using 10/2 nm then the ground gets connected to the ground bar not the middle screw of the breaker. That is left empty unless you have a neutral supplied to the equipment-- 10/2 has no neutral if it 240V
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
But if your LV control needs a neutral (needs 120V) then you need to use 10/3 (plus ground) NM instead of 10/2. Thanks for catching that Dennis.
fred trueblood
Member
- Location
- elizabeth city n c
do you still have gfi protection
fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
NOPE.
fred trueblood
Member
- Location
- elizabeth city n c
i'm sure this will fix the problem youre sure right
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
You mean do you have GFI protection if you use 10/3. Yes you do, by connecting the real neutral wire to the neutral terminal on the two pole GFCI breaker.
Note that if the LV transformer had a 240V primary you might not need a neutral at all.
fred trueblood
Member
- Location
- elizabeth city n c
no I mean if you connect thegrounded conductor to the grounding bar i will still have gfi protection (Im working for a lawyer dont need any problems)
fred trueblood
Member
- Location
- elizabeth city n c
yes the low voltage has a 240 imput
fred trueblood
Member
- Location
- elizabeth city n c
connecting grounded conductor to ground bar instead of mid terminal of gfibreaker still gives gfi protection and is code compliant?
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
Whether you connect the grounding conductor to the ground bar (You do NOT have a grounded conductor if you are using 10/2!!!) you will have GFCI protection because the current flowing out on one hot wire must exactly (within 6ma) match the current in the other hot wire. That is exactly the protection you need. Since you have no neutral, you will connect nothing to the neutral terminal on the breaker but you must connect the EGC (bare copper in the 10/2) to the ground bar in the panel.
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
NO. But only because you do not have a grounded conductor.
Rephrasing your words properly:
"connecting grounding conductor to ground bar instead of mid terminal of gfibreaker still gives gfi protection and is code compliant?"
The answer to that would be YES.
fred trueblood
Member
- Location
- elizabeth city n c
thank you very much you have saved me a world of worry and trouble. God bless your soul
- Location
- Placerville, CA, USA
- Occupation
- Retired PV System Designer
One more one more thing:
For at least some two pole GFCI breakers you do have to connect the white neutral pigtail from the breaker to the neutral bar in the panel even if you do not connect anything to the neutral screw on the breaker.
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