Question

Class A or Class X conductors may be run together to a single appliance in a room not exceeding __________

a) 10 feet
b) 15 feet
c) 20 feet
d) 25 feet

Answer 1

Class A or Class X conductors may be run together to a single appliance in a room not exceeding 20 feet.

Step-by-step explanation:

According to National Electrical Code (NEC), Class A or Class X conductors can be run together to a single appliance in a room not exceeding 20 feet. It concerns the magnetic force per unit length between two parallel conductors, which can be attractive or repulsive, depending on the direction of the currents in the conductors. Questions in this area often revolve around using Ampère's Law and the Biot-Savart Law to calculate such forces, and assessing the practical implications these forces might have on the system. This is foundational for understanding electricity and magnetism in Physics.