Conductor coating

[czars]

Are the typical copper conductors of NM-B or #3 THWN coated or uncoated? If coated, what are they coated with?

 

[augie47]

Are you asking about a coating on the conductor itself or the insulation ??

 

[czars]

Coating on the conductors.

 

[hbiss]

Shouldn't be anything on the copper.

-Hal

 

[Dennis Alwon]

There is a product that is copper coated aluminum wire. But I don't know of anything that coats the copper.

 

[czars]

Chapter 9 Table 8 lists resistance values for coated and uncoated conductors but I wasn't aware of any coating other than enameled wire for magnets and motors or tinned copper for easier soldering.

 

[xformer]

It goes back to the old days when conductors used rubber insulation. Copper and rubber are natural enemies to the manufacturers coated the copper with a light coating of tin to keep the peace between the two.

 

[infinity]

Are the typical copper conductors of NM-B or #3 THWN coated or uncoated? If coated, what are they coated with?

They're insulated not coated.