Overcurrent protection devices (OCPDs) need protection, too. Not from overcurrent, but from physical damage [240.30(A)]. You can provide that protection in one of two ways: 1. Put them in something: an enclosure, cabinet, cutout box, or equipment assembly. 2. Mount them on something: open-type switchboards, panelboards, or control boards. The second option is available only if what you’re mounting the OCPD on is: 1. In a room or free from dampness and ignitable material, and 2. ...

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