Older Type-NM grounding

[tonype]

Never saw this - older Type-NM with what appears to be a separate insulated grounding conductor (hope I am using the correct terminology) run parallel to the main cable. Home is ca. 1950. In several areas, these grounding conductors have been disconnected (I am concluded that this is why many of the 3-prong receptalces are ungrounded). Has anyone had experience in this?

 

[dhalleron]

I have never seen a separate ground installed at the same time as the 2 wire romex. Plenty of times I've seen a ground wire fished in later.

I can't see the reason for running the separate ground. Houses I have seen from this time frame used grounded romex in the kitchens. If they had grounded romex available, why not use it in the other rooms?

 

[mbednarik]

It wasn't required in the whole house until 1962, only kitchens basements and porches had to have grounded wiring. plus there was a shortage of grounded romex so they probably only did what they had to, kindof like arc fault breakers. I have never seen a new panel with 20 afci's in it.

 

[maghazadeh]

I have seen this kind of installations many times in the older homes.
when 2 wire romax cable was used with metal J box, device boxes, usually I would see separate bare grounding conductors run and attached to outside of the metal boxes. In some cases insulated separate wire was used but mostly bare and smaller than phase and neutral wire.