I suspect to have the right answer you will need to read the relevant standards/cert and understand how it interacts with your design. But the general theory a

I suspect to have the right answer you will need to read the relevant standards/cert and understand how it interacts with your design. But the general theory as I understand it generally is not that the plastic may not burn, only that they are self extinguishing. V-0 like that filament means it will extinguish itself within a maximum of 10 seconds after the ignition source is removed. Regular filament acts more like an accelerant, put a flame near it and it burns quite vigorously, and for a long time. Meaning anything near it that can burn will likely catch fire too.