Wireways shall be smooth and free from sharp edges.Wires shall be protected so that they do not come into contact with burrs, cooling fins, etc., which may cause damage to the insulation of conductors.Holes in metal through which insulated wires pass shall be provided with bushings or, unless required otherwise in the relevant part of IEC 62841-2, IEC 62841-3 or IEC 62841-4, shall have smooth, well-rounded edges. A radius of 1,5 mm is considered to be well rounded.Wiring shall be effectively prevented from coming into contact with moving parts.Compliance is checked by inspection.