What is an important consideration when installing multi-gang boxes?

When installing multi-gang boxes, the total volume of devices is a crucial consideration for proper box fill calculation. According to the National Electrical Code (NEC), maintaining the appropriate volume in electrical boxes is essential to prevent overheating and to ensure that all conductors and devices in the box have enough space.

Each device and conductor has a specific volume requirement, and when multiple devices are housed within a single box, the total volume must accommodate the sum of these requirements to comply with safety standards. Failing to calculate this correctly can lead to issues such as equipment malfunction or fire hazards due to overcrowding. Thus, ensuring that the box has sufficient volume relative to the number of devices ensures safety and compliance with the NEC guidelines, making this aspect of installation particularly important.