NF Panelboard interiors can be used for applications such as commercial buildings, industrial buildings, stadiums, and offices. These interiors provide protection for commercial and industrial applications. NF Panelboards are versatile panelboards that feature a wide selection of circuit breakers, accessories, and ready to install kits. NF Panelboards have modular construction to accept field installable accessories and conversion kits. This NF panelboard neutral assembly is panelboards with sub-feed or thru-feed lugs and the neutrals are 200% rated. This deadfront panel kit is for a 400A 3 phase 4 wire panelboard with 66 spaces.