Identification should include the types of conductors (e.g., copper, aluminum, and copper-clad conductors), their sizes (determined by using wire strippers or the American wire gauge [AWG] system), and an application for each.
IRC: Chapters 34, 35, 36, and 37 (https://codes.iccsafe.org/content/IRC2018P4) cover types of conductors approved by code and installation.
Process/Skill Questions:
NCCER Standards:
Electrical