When comparing a 10 AWG uncoated copper conductor to a 10 AWG coated copper conductor, which statement is false?

When evaluating the properties of a 10 AWG uncoated copper conductor versus a 10 AWG coated copper conductor, it is important to understand the relationship between coating, resistance, and other physical properties.

The statement regarding the uncoated conductor having a greater resistance value is false because both conductors, being the same gauge and made of copper, will have the same resistance under ideal conditions. The resistance of a conductor primarily depends on its material, length, and cross-sectional area, all of which are unchanged between the coated and uncoated varieties as long as we are comparing conductors of the same gauge.

The other statements hold true: the coated conductor indeed provides better corrosion resistance, which is a significant advantage in harsher environments. Additionally, the uncoated conductor is typically less expensive due to the absence of an insulating layer, which contributes to the overall cost. Finally, under identical conditions, both conductors maintain the same ampacity because ampacity is determined by the conductor's gauge and material rather than its coating. Thus, the comparison clarifies that the attainment of electrical performance characteristics primarily hinges on the conductor's physical properties rather than the presence or absence of a coating.