GEC 4 AWG armor protection

[Jpflex]

#4 AWG Grounding electrode conductor smaller than 6 AWG requiring protection to ground rod

A coworker did this installation but it looks silly and looks as if there may need a red armor cable bushing inside of it at end but a silly looking armor cable connector is connected at end as shown

What is proper way to end armor cable?

Ungrounded conductors are 3/0 so insulated #4 AWG GEC only available was used

 

[jaggedben]

There is a clamp fitting specifically designed for this.

 

[jaggedben]

Or I should say, multiple manufacturers make it, I'm sure.

Here's an example:

1/2''-1'' Bronze Armored Ground Clamp

Armored Ground Clamps are used to connect bare or armored copper wire to steel water pipe for grounding. They feature an integral clamp that securely holds armor conduit, and a set screw that tightly grips bare copper wire, decreasing the chances of the g

lhdottie.com

Note the extra little clamp with the two smaller screws. That clamps the cable armor. The ground wire itself is terminated on the big screw in the middle.

 

[Jpflex]

Or I should say, multiple manufacturers make it, I'm sure.

Here's an example:

1/2''-1'' Bronze Armored Ground Clamp

Armored Ground Clamps are used to connect bare or armored copper wire to steel water pipe for grounding. They feature an integral clamp that securely holds armor conduit, and a set screw that tightly grips bare copper wire, decreasing the chances of the g

lhdottie.com

Note the extra little clamp with the two smaller screws. That clamps the cable armor. The ground wire itself is terminated on the big screw in the middle.

I’m not sure why this ground clamp doesn’t support this but maybe because it’s designed for GEC not exposed to damage and 6 AWG?

 

[Jpflex]

Or I should say, multiple manufacturers make it, I'm sure.

Here's an example:

1/2''-1'' Bronze Armored Ground Clamp

Armored Ground Clamps are used to connect bare or armored copper wire to steel water pipe for grounding. They feature an integral clamp that securely holds armor conduit, and a set screw that tightly grips bare copper wire, decreasing the chances of the g

lhdottie.com

Note the extra little clamp with the two smaller screws. That clamps the cable armor. The ground wire itself is terminated on the big screw in the middle.

So you don’t need a bushing inside of armor as you would MC cable?

 

[letgomywago]

So you don’t need a bushing inside of armor as you would MC cable?

You don't need it with MC only AC cable

 

[LarryFine]

#4 AWG Grounding electrode conductor smaller than 6 AWG requiring protection to ground rod

Since #4 is larger than #6, the armor is not necessary.

 

[curt swartz]

That isn't armored ground.
Armored ground has bare conductor, not insulated. Someone use flex or scrap MC jacket over the GEC.

 

[hbiss]

That isn't armored ground.
Armored ground has bare conductor, not insulated. Someone use flex or scrap MC jacket over the GEC.

Which is a violation as done because the flex needs to be bonded to the conductor at each end, same as when sleeving the GEC with EMT or galvanized.

-Hal

 

[letgomywago]

Which is a violation as done because the flex needs to be bonded to the conductor at each end, same as when sleeving the GEC with EMT or galvanized.

-Hal

Unless aluminum flex was used

 

[LarryFine]

That isn't armored ground.
Armored ground has bare conductor, not insulated. Someone use flex or scrap MC jacket over the GEC.

It looks like standard 1/2" FMC to me.,

 

[roger]

To go with Hal's post the code section is 250.64(E)

 

[winnie]

Which is a violation as done because the flex needs to be bonded to the conductor at each end, same as when sleeving the GEC with EMT or galvanized.

-Hal

GECs are expected to carry unbalanced current, specifically electrical discharges to ground. GECs surrounded by ferrous sleeves are subject to 'choke' effects, and must be bonded to that sleeve at _both_ ends. The install in the photo is IMHO a violation.

-Jon

 

[wwhitney]

GECs surrounded by ferrous sleeves are subject to 'choke' effects, and must be bonded to that sleeve at _both_ ends. The install in the photo is IMHO a violation.

If the "armor" is ferrous. But if it's aluminum (some FMC, for example), no problem with 250.64(E).

Cheers, Wayne

 

[Krusscher]

https://www.gordonelectricsupply.co...MJTEoaEWYcSkDcY9WUA3R6v22YJpey8hoCMX0QAvD_BwE I've used these before

 

[infinity]

I agree that it's most likely 1/2" FMC which is a not permitted method for the protection of a GEC subject to physical damage.