... and Usage: An overview of the - CM, CMW, the CME, the CMD busbar type wall bushingHigh-voltage wall bushings: hereinafter ... partitions, walls, or electrical equipment enclosure to support the conductive part to make it right or housing insulation.Ceramic wall bushings ... 1 voltage ceramic wall casing technical conditions. CM, CMW, the CME, the CMD busbar type wall bushing (high-voltage wall bushing) ...