ptonsparky
Tom
- Occupation
- EC - retired
I followed up on the Leviton. They no longer make one but Hubbel does according to the 800#.
60A 3-phase GFCI
- Thread starter brantmacga
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brantmacga
Señor Member
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- Georgia
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winnie
Senior Member
- Location
- Springfield, MA, USA
- Occupation
- Electric motor research
The leviton doc does not mention 3 phase, but does mention 4 wire. Confusing.
The automation direct stuff can be adjusted to 5mA, the question being has it been approved by an NTRL as a class A GFCI.
-Jon
The automation direct stuff can be adjusted to 5mA, the question being has it been approved by an NTRL as a class A GFCI.
-Jon
winnie
Senior Member
- Location
- Springfield, MA, USA
- Occupation
- Electric motor research
It looks like the hubbell device is rated for up to 50A. It requires a sensing module and a dedicated breaker.
https://hubbellcdn.com/catalogpage/Wiring_Catalog_L12_CatPage.pdf
-Jon
https://hubbellcdn.com/catalogpage/Wiring_Catalog_L12_CatPage.pdf
-Jon
- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
As it says in the Hubbel document,
If the A-D device had that, believe me, they would be advertising it, their data sheet only mentions UL-508, which is for industrial controls. It's tough to get UL943 because from the mfr's standpoint the liability is involving human life, not just equipment. So their insurance carriers make a quantum leap in liability coverage costs and to venture into making a Class A GFCI, you have to be sure to sell a LOT of them to be worth it.
- Location
- Chapel Hill, NC
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- Retired Electrical Contractor
I though Sq.D made them but they are something like $1000. I have not seen this first hand so...
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
http://www.benderinc.com/fileadmin/content/Products/d/ca/LifeGuard_datasheet_NAE1082321.pdf
they may make a rated relay that u can use with a shunt trip or uv
The standard LifeGuard model features a 6 mA trip level. The units trip in accordance with UL943, the standard for personnel protection. The minimum response time is 25 ms at leakage currents of 250 mA and above. A built-in inverse time curve helps to prevent nuisance tripping issues, particularly in systems with variable frequency drives (VFDs).
Models up to 100 A using voltages to which UL943 Class A devices apply are listed to UL943 as Class A ground fault circuit interrupters.
they may make a rated relay that u can use with a shunt trip or uv
The standard LifeGuard model features a 6 mA trip level. The units trip in accordance with UL943, the standard for personnel protection. The minimum response time is 25 ms at leakage currents of 250 mA and above. A built-in inverse time curve helps to prevent nuisance tripping issues, particularly in systems with variable frequency drives (VFDs).
Models up to 100 A using voltages to which UL943 Class A devices apply are listed to UL943 as Class A ground fault circuit interrupters.
brantmacga
Señor Member
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- Georgia
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- Former Child
I think jraef is right about the listing. Looks like this Lifeguard may be what we need.
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- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
Call your banker, you'll need a second mortgage...
kwired
Electron manager
- Location
- NE Nebraska
There are none over 60 amp that I know of yet in QO line, 2 or 3 pole. They are not in online catalog yet if they do have over 60 amp.
Look at technical spec sheet - only listed for UL508 applications.
romex jockey
Senior Member
- Location
- Vermont
- Occupation
- electrician
So does 210.8B pose a situation manufacturers haven't yet marketed?
I though it was usually the other way round?
~RJ~
I though it was usually the other way round?
~RJ~
ptonsparky
Tom
- Occupation
- EC - retired
Is the catch in 210.8(B) that it says “...receptacles rated 150 volts to ground or less..”?
The OP will be using 208 or even 250 volt Recepts with no neutral.
The L5 recepts are 125v
L6 twistlocks are 250v.
Seems odd that they based the protection on the voltage rating of the receptacle and not the applied voltage of the system.
Add: Using 15-60R & P configurations would seem to alleviate the GFCI dilemma.
I am convinced. The AHJ is another problem
The OP will be using 208 or even 250 volt Recepts with no neutral.
The L5 recepts are 125v
L6 twistlocks are 250v.
Seems odd that they based the protection on the voltage rating of the receptacle and not the applied voltage of the system.
Add: Using 15-60R & P configurations would seem to alleviate the GFCI dilemma.
I am convinced. The AHJ is another problem
Last edited:
brantmacga
Señor Member
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- Georgia
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Pretty sure that wasn’t the CMP intention; we still have a ground, and it lists 3-phase receptacles.
It’s a 208Y/120 system.
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ptonsparky
Tom
- Occupation
- EC - retired
I would not of thought so either. Picking at straws.
Do you need the neutral to the fryers?
kwired
Electron manager
- Location
- NE Nebraska
After reading ROP's or whatever the are now called, I don't think they had any intentions other then they were convinced that there are supposedly some devices out there that meet the listing requirements and that we should be using them. Would have been nice to have a reason on why they selected the locations required as well. by simply stating devices are available leaves it wide open to require them on just about anything down the road. In the past most GFCI requirements were justified by incidents in certain applications more so then just a general rule because we have a product available.
brantmacga
Señor Member
- Location
- Georgia
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- Former Child
Got a quote this morning. $17,500.
This is going to be fun.
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ramsy
Roger Ruhle dba NoFixNoPay
- Location
- LA basin, CA
- Occupation
- Service Electrician 2020 NEC
If 208Y/120 is 120v to Ground, 208v L-L, there's no Class A GFCI requred if < 150v to ground.
brantmacga
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