'NMD' stands for 'non-metallic dry'. It means the jacket, or the sheathing, around the wire is not a metallic material and it's for dry locations. Other types of wiring may have a metal sheathing or be rated for exterior and/or wet conditions
'NMD' stands for 'non-metallic dry'. It means the jacket, or the sheathing, around the wire is not a metallic material and it's for dry locations. Other types of wiring may have a metal sheathing or be rated for exterior and/or wet conditions