Which two parts of Article 310 contain tables used to calculate conductor ampacity?

The correct answer highlights that Article 310 of the National Electrical Code (NEC) is structured to provide guidance on various aspects of conductor ampacity, particularly for different types of installations and conditions. Part II contains specific tables that detail the allowable ampacities for conductors based on different factors, such as conductor size, insulation type, and installation environment.

These tables are critical for ensuring safety and compliance with electrical codes when determining the appropriate conductor size for electrical installations. They provide necessary information to help electricians and engineers prevent overheating and ensure that conductors operate within safe limits under specified conditions. Part I, III, and IV contain other relevant information but do not specifically provide the tables used for calculating the conductor's ampacity.