old romex rated at 60 degrees

[shputnik]

The romex installed before 1984, I believe, was rated at 60 degrees. Was there a typical color sheath that was used?
Besides obviously reading the sheath for the tell tail NM-B marking, what did it look like?

For instance I have come across an older romex with a blue sheath?

What hazards does it pose compared to the B rated at 90 degrees?
If the customer was paying and you came across it during construction, would you rip it out and install new stuff?

 

[kwired]

The romex installed before 1984, I believe, was rated at 60 degrees. Was there a typical color sheath that was used?
Besides obviously reading the sheath for the tell tail NM-B marking, what did it look like?

For instance I have come across an older romex with a blue sheath?

What hazards does it pose compared to the B rated at 90 degrees?
If the customer was paying and you came across it during construction, would you rip it out and install new stuff?

The biggest problem with it is you will not find many luminaires that don't require connection to 90 degree supply conductors any more. Most everything else is just fine if it is existing.

 

[Rewire]

you still use the 60c table so unless you have a device that is specific for 90c wire I would not remove it.

 

[Dennis Alwon]

There was no color scheme. I have seen the old nm cable in white, blue and black. It just depends on the manufacturer at that time.

As stated by kwire, the only problem with the old nm is when it is installed in luminaires. I would not rip it out unnecessarily except where it connects to the lighting.

 

[ActionDave]

I love to scrap the stuff because it strips so easy, but I agree with the others- in most cases leave it.

 

[Little Bill]

I read somewhere the other day (can't remember where) that the blue was made/used in the late 70s to early 80s.

 

[Dennis Alwon]

I seem to remember the wire in NM being rated 75C at one time. Or am I mistaken.