Class 2 or Class 3 audio circuit conductors are permitted to occupy the same cable or raceway with other similar circuits following the guidelines specified in Section 640.9 of the National Electrical Code (NEC).
The answer to the question concerning the National Electrical Code (NEC) and the occupancy of the same cable or raceway by Class 2 or Class 3 audio circuit conductors with other Class 2 or Class 3 remote control or signaling circuits can be found in Section 640.9. According to this section, it states that Class 2 and Class 3 circuits shall be permitted to occupy the same cable or raceway. It's crucial to abide by this code for the safe installation of audio and control systems.
It is important to note that the NEC provides guidelines and requirements which are essential in ensuring electrical safety and preventing potential hazards. When handling any sort of electrical installations, one must always refer to the NEC to comply with local codes and regulations.
Therefore, the correct option to complete the statement is "3) Shall be permitted to", meaning that these audio circuit conductors can share the same space with other similar circuits if done appropriately according to the NEC.