Sometimes, when you order electrical cable on spool packaging, you may find white powder on the surface of the cable. Below, you can see this powder on an image of Alpha Wire’s 391040 series as an example. Is this powder harmful to the cable?
The powder is talc which is an intended ingredient. The talc is applied after silicone curing and just prior to final packaging to prevent the insulation from sticking to itself while on spool. This powder does not affect the cable’s function.