Ground Question

Originally Posted By: jpope
This post was automatically imported from our archived forum.



In a residential application, is it acceptable to use FMC as the grounding conductor for the general household circuits?


![](upload://3hyikJrJbyIxVDTSD9jglJCov2F.jpeg)

![](upload://54K7CujcKrtzYjxv3dcPY2GX3vC.jpeg)

Are there additional requirements when it's done this way?


--
Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738

Originally Posted By: bbadger
This post was automatically imported from our archived forum.



Yes it is allowed.


Quote:
250.118 Types of Equipment Grounding Conductors.
The equipment grounding conductor run with or enclosing the circuit conductors shall be one or more or a combination of the following:

(5)Flexible metal conduit where both the conduit and fittings are listed for grounding.

(6)Listed flexible metal conduit that is not listed for grounding, meeting all the following conditions:

a.The conduit is terminated in fittings listed for grounding.

b.The circuit conductors contained in the conduit are protected by overcurrent devices rated at 20 amperes or less.

c.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).

d.The conduit is not installed for flexibility.


Hard to say if the FMC in your photo is listed.

But it is damaged and should be replaced.


--
Bob Badger
Electrical Construction & Maintenance
Moderator at ECN

Originally Posted By: jpope
This post was automatically imported from our archived forum.



Thanks Bob.


I called for the replacement of the damaged FMC but was drawing a blank with regards to its acceptability for grounding.


--
Jeff Pope
JPI Home Inspection Service
"At JPI, we'll help you look better"
(661) 212-0738