Question

Class 2 or class 3 conductors may be run in the same raceway with class 1 circuits provided

A. They are functionally associated
B. They are separated by a solid and firmly fixed barrier.
C. That there is a 2 inch separation between the conductors.
D. They are carrying less than 150 V.C.

Answer 1

Class 2 or Class 3 conductors may only be run in the same raceway with Class 1 circuits if they are functionally associated, not merely because they are separated by barriers or by a certain distance, or carrying less than 150 V.

Step-by-step explanation:

The student's question pertains to the conditions under which Class 2 or Class 3 conductors may be run in the same raceway with Class 1 circuits. According to the National Electrical Code (NEC), one specific condition where this is acceptable is when they are functionally associated.

However, the conditions listed in the question, such as being separated by a solid barrier, maintaining a 2-inch separation, or carrying less than 150 V, do not generally apply to the NEC code for Class 1, 2, and 3 circuits. The correct conditions for running these classes of circuits together in the same raceway will be clearly defined by code requirements which can vary depending on the situation and must always be adhered to in order to ensure safe and reliable electrical installations.

One key consideration in the electrical code is to prevent electrical interference and maintain safety. For example, low-voltage and power circuits may induce unwanted currents or pose a risk if not properly separated, whereas functionally associated systems might be designed to work together safely.