250.118 - using emt conduit as a ground

**kwired** · 01-30-19, 07:00 PM

Originally Posted by kec

Agree, if set screws are tight then your are good to go, but Ive come across installations [done by others] with duck tape used for couplings.

And also seen 1/2 FMC fittings used for 3/4 EMT. Works great when you ran 3/4 but didn't know how to enlarge a 1/2 KO, or if you needed a 90 degree connector

**LarryFine** · 01-30-19, 09:28 PM

Originally Posted by kec

. . . Ive come across installations [done by others] with duck tape used for couplings.

I'm sure the duct tape was put on to facilitate using vacuum to pull in string to pull in a pull rope.

**retirede** · 01-30-19, 09:38 PM

Originally Posted by LarryFine

I'm sure the duct tape was put on to facilitate using vacuum to pull in string to pull in a pull rope.

It could have been duck tape:

https://www.duckbrand.com

**LarryFine** · 01-30-19, 09:50 PM

Originally Posted by retirede

It could have been duck tape:

https://www.duckbrand.com

Oh, you're quackers!

(yes, I know about that brand)

**electrofelon** · 01-30-19, 10:04 PM

Originally Posted by LarryFine

I'm sure the duct tape was put on to facilitate using vacuum to pull in string to pull in a pull rope.

I have seen it used to (presumably) make fittings raintight

**480sparky** · 01-30-19, 11:16 PM

Originally Posted by Besoeker3

What did you say????

Speak up, sonny. I kint hear ya.

Now, get off my lawn!!!!

**DBoone** · 01-31-19, 09:38 AM

Originally Posted by kec

Agree, if set screws are tight then your are good to go, but Ive come across installations [done by others] with duck tape used for couplings.

Always use aluminum foil duct tape, maintains continuity....good to go

**MAC702** · 01-31-19, 10:03 AM

Originally Posted by DBoone

Always use aluminum foil duct tape, maintains continuity....good to go

Brilliant, literally!

**Adamjamma** · 02-01-19, 07:12 AM

It comes down to installation... in UK and USA I don’t run into much rusted out emt, so the use of it for ground is fine. In Caribbean I run into a lot of rusted out emt with no continuity of ground... so in Caribbean I always add a ground conductor...

**petersonra** · 02-01-19, 09:59 AM

Originally Posted by Adamjamma

It comes down to installation... in UK and USA I don’t run into much rusted out emt, so the use of it for ground is fine. In Caribbean I run into a lot of rusted out emt with no continuity of ground... so in Caribbean I always add a ground conductor...

It seems to me that if the EMT is rusting out it is not suitable to use it at all in that location.