Special K
Member
- Location
- Gibsonia,Pa
WAS the grey wire ever used as an ungrounded conductor in the old code books like the 1978 or older without being reidentified
grey as an ungrounded conductor
- Thread starter Special K
- Start date
- Status
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Yes.
It is only fairly recently that grey has become 'reserved' for grounded conductors
Back in my day 
there were certain insulations that could not be produced in white. The best the manufactures could do was an "off-white" or "natural grey" which was referenced in the Code for many years as a permissible grounded conductor.
Since Grey and "natural grey" were not the same, during that era grey could be used as a phase conductor.
There are not likely too many Forum members left that worked with "natural grey" and soldered joints
there were certain insulations that could not be produced in white. The best the manufactures could do was an "off-white" or "natural grey" which was referenced in the Code for many years as a permissible grounded conductor.Since Grey and "natural grey" were not the same, during that era grey could be used as a phase conductor.
There are not likely too many Forum members left that worked with "natural grey" and soldered joints
- Status