Which statement about partitions in a multi-gang switch box is true?

Which statement about partitions in a multi-gang switch box is true?

• A. Partitions must be installed between all adjacent switches.
• B. Partitions are never required.
• C. Partitions are required only between certain adjacent pairs.
• D. Partitions must be installed behind all faces.

Answer: (C)

Partitions in a multi-gang box are about providing isolation where it’s needed, not about placing a barrier everywhere. They’re used to separate conductors or devices that could be on different circuits or present different potential, so you don’t risk contact or arcing inside the same box. Because not every situation inside a multi-gang box requires that level of separation, partitions are installed only between those adjacent devices that actually need it. That’s why the best choice is that partitions are required only between certain adjacent pairs. If all devices in the box are on the same circuit and designed to share the space safely, a partition may not be needed. But if two adjacent devices involve separate circuits or require physical or electrical separation, a partition is used there. The other options overstate or understate the requirement, so they aren’t correct in general.

Partitions in a multi-gang box are about providing isolation where it’s needed, not about placing a barrier everywhere. They’re used to separate conductors or devices that could be on different circuits or present different potential, so you don’t risk contact or arcing inside the same box. Because not every situation inside a multi-gang box requires that level of separation, partitions are installed only between those adjacent devices that actually need it.

That’s why the best choice is that partitions are required only between certain adjacent pairs. If all devices in the box are on the same circuit and designed to share the space safely, a partition may not be needed. But if two adjacent devices involve separate circuits or require physical or electrical separation, a partition is used there. The other options overstate or understate the requirement, so they aren’t correct in general.