Supplementary overcurrent devices shall not be required to be ___.

• A. readily accessible
• B. enclosed
• C. ventilated
• D. mounted

Answer: (A)

Supplementary overcurrent devices can be placed inside equipment or behind access-control panels, where access is not readily available to the general user. The safety goal is still met because the device is enclosed and protected from accidental contact, and it is installed in a way that maintains proper cooling and secure mounting. Because of this, the code does not require these devices to be readily accessible. They must still be enclosed to contain any fault current, ventilated to dissipate heat, and mounted securely so they stay in place and operate reliably.