EGC required or not?

[sfav8r]

We have an EV charger that is fed with two 40a 220 circuits in two conduits. There are two j-boxes next to the EV station and one LT whip from each j-box to the EV station. We ran an EGC in one of the LT conduits to the only grounding location on the EV charger. The inspector failed the install because the 2nd LT conduit had no ground wire. My thought was that the point of the EGC is to ground the equipment and that only one conduit needed a ground to accomplish this. Had there been a 2nd grounding location, I would have run a 2nd one anyway. The inspector said that any flex needs a ground. I would normally agree, but that's because the flex cant act as a ground like EMT would, but in this case the equipment was already grounded via the other LT. He asked me to pull the 2nd one, tie them together and pigtail to the available grounding location. It was easier to do than to discuss anymore, I'm just curious what others think on this topic.

Thanks

 

[infinity]

Is the liquidtight metallic or non-metallic? If it's LFNC then I agree with the inspector since the EGC needs to be in each raceway along with the circuit conductors.

 

[sfav8r]

Is the liquidtight metallic or non-metallic? If it's LFNC then I agree with the inspector since the EGC needs to be in each raceway along with the circuit conductors.

Thanks, do you have a code section? I understand how NORMALLY this would be the case, but it seems like the 2nd one isn't accomplishing anything on this install.

 

[infinity]

I agree with you that it is redundant but this would apply. If it were LFMC and met the restrictions of 250.118 then the conduit could qualify as an EGC unless flexibility were required after installation.

300.3 Conductors.
(B) Conductors of the Same Circuit. All conductors of the same circuit and, where used, the grounded conductor
and all equipment grounding conductors and bonding conductors shall be contained within the same raceway, auxiliary gutter, cable tray, cablebus assembly, trench, cable, or cord, unless otherwise permitted in accordance with 300.3(B)(1) through (B)(4).

 

[Carultch]

I agree with you that it is redundant but this would apply. If it were LFMC and met the restrictions of 250.118 then the conduit could qualify as an EGC unless flexibility were required after installation.

LFMC has its limitations on use as an EGC, that are specified by the manufacturer. On 1" LFMC for example, I've seen it marked on the print legend to use a wire EGC for circuits over 60A.

From Anaconda Sealtite:
http://flexiblewiringconduits.anacondasealtite.com/Asset/2016 ANAMET - UA.pdf

• Approved as an equipment grounding conductor insizes 3/8” through 1-1/4” if the total grounding path is 6ft. or less, and the circuit conductors are protected byovercurrent devices rated at 20 amps or less for 3/8”and 1/2” and 60 amps or less for 3/4” through 1-1/4”

 

[infinity]

LFMC has its limitations on use as an EGC, that are specified by the manufacturer. On 1" LFMC for example, I've seen it marked on the print legend to use a wire EGC for circuits over 60A.

From Anaconda Sealtite:
http://flexiblewiringconduits.anacondasealtite.com/Asset/2016 ANAMET - UA.pdf

Actually those conditions are specified by the NEC in the aforementioned 250.118:

250.118(6) Listed liquidtight flexible metal conduit meeting all
the following conditions:
a. The conduit is terminated in listed fittings.
b. For metric designators 12 through 16 (trade sizes
3 ⁄ 8 through 1 ⁄ 2 ), the circuit conductors contained in
the conduit are protected by overcurrent devices
rated at 20 amperes or less.
c. For metric designators 21 through 35 (trade sizes
3 ⁄ 4 through 1 1 ⁄ 4 ), the circuit conductors contained in
the conduit are protected by overcurrent devices
rated not more than 60 amperes and there is no
flexible metal conduit, flexible metallic tubing, or
liquidtight flexible metal conduit in trade sizes
metric designators 12 through 16 (trade sizes 3 ⁄ 8
through 1 ⁄ 2 ) in the grounding path.
d. The combined length of flexible metal conduit and
flexible metallic tubing and liquidtight flexible
metal conduit in the same ground return path does
not exceed 1.8 m (6 ft).
e. Where used to connect equipment where flexibility
is necessary after installation, an equipment
grounding conductor shall be installed.

 

[sfav8r]

Thanks for the replies. happy Holidays!