Which of the following does not specifically change the DC resistance of a particular conductor?

The change in DC resistance of a conductor is primarily influenced by its material, dimensions, and configuration. Insulation, which serves to protect the conductor and prevent electrical leakage, does not directly affect the DC resistance of the conductor itself. The DC resistance is determined by the properties of the conductor's material, such as its resistivity, as well as its length and cross-sectional area.

Contrastingly, coating, material, and stranding all influence resistance in different ways. A coating can affect surface conductivity, material choice directly impacts resistivity, and stranding alters the effective cross-sectional area that contributes to resistance. Therefore, insulation is the correct answer as it does not inherently change the electrical characteristics of the conductor itself.