... steel usePowder coating-for architectural purposed to BS6497Perforated cable tray Dimensions:Cable Tray dimensions are all internal.Depth of 35mm, 50mm, ... NEMA certification.Welcome to get our catalogue. The electric cable tray system are widely used for construction projects, such as ... to different structures: the great span type, ladder type,tray type, trough type, combined type and layout slot 2. ...