1.1 These requirements cover polymeric temporary panelboard ingress barriers intended to be field
installed over the electrical access opening of indoor enclosed panelboards. These barriers are intended for temporary use only, for the period of a work shift (or consecutive work shifts), during which wiring of the internal components of the aforementioned devices is being performed by qualified users.
1.2 The barriers covered by these requirements are intended for use in indoor locations where
temperatures are not expected to exceed 50°C (122°F) and not expected to be below 0°C (32°F). These
barriers are not intended to be subjected to direct sunlight, rain, snow, or the like. Barriers may additionally be evaluated and marked for use in locations where temperatures exceed 50°C (122°F).