电缆颜色问题(火烧到眉毛了)? an outer sheathing of polyvinylchloride of relative density 1.31 kg/dm3 at 20° c, with a nominal thickness of approximately 1.0 mm. the preferred colour is light grey, however, with the exception of the colour blue, the manufacturers standard is acceptable . note: the colour blue is reserved for cables carrying intrinsically safe signals only. 看来制造厂的标准是可以接受的,你可以要求厂家提供制造标准,只要业主不反对就可以了查看更多