Plastic trunking sizes fluctuate, with widths ranging from 3mm to about 300mm, though depth can go from under 10mm to above 100mm. Plastic cable conduits are commonly found in workplaces, notably places of work. Conduit has rigorous tips on cable fill (usually forty% of its interior diameter) to avoid overheating. https://cabletrunking57789.theblogfairy.com/36142428/electrical-trunking-an-overview