Determines Suitability for Indoor, Outdoor or Corrosive Areas
Select a NEMA Rating to meet your particular installation site conditions, based on the following attributes:
Good: NEMA 12 PIADs are suitable for indoor use and will resist exposure to dust.
Better: NEMA 4 PIADs are suitable for outdoor use and will resist direct washdown and deluge rain conditions.
The Best: NEMA 4X PIADs also resist direct washdown and deluge rain, while also providing high corrosion resistance.