A device or utilization equipment wider than a single 2 in. device box shall have what volume allowance provided for each gang required for mounting?

In the context of the National Electrical Code (NEC), the volume allowance for a device or utilization equipment that is wider than a single 2-inch device box is specifically defined. When a device exceeds the dimensions of a standard single gang box, it is essential to provide additional volume to accommodate the larger size and any associated wiring.

For devices that require a volume allowance, the NEC specifies that a double volume allowance must be provided for each gang that is required for mounting the wider device. This ensures that there is enough space within the box for not only the device itself but also for the conductors and any necessary connections. By providing a double volume allowance, the installation maintains safety and compliance with code requirements to avoid issues such as overheating due to overcrowding of electrical conductors.

Understanding this rule helps ensure that installations are performed safely and in accordance with NEC standards, promoting both reliability and code compliance in electrical work.