question about insulating around light fixture boxes

[plinker]

Construction information
We have trusses and the celing is 3/4" thick pine boards, the fixture boxes are pvc w/ metal brackets to go between the trusses. We used blow-in cellulose insulation.

My question is, When they were installed I stapled plastic (6 mil. thick ) over the area where the box goes to keep the dust out and put a piece of fiberglass batt over that.

Is the plastic going to cause a fire hazzard or other problems?
I know dustin wiring is a problem, hence the plastic. We have about 6" of blow-in insulation currently blown in and the rest will be done fri-sat this week.

I need to know if I should remove the plastic and just leave the batting over the fixture boxes.

 

[tfi racing]

The plastic is fine,in fact it is a code rule to maintain the integrity of the vapour barrier around the boxes.They make poly "hats" specifically for this,they are then taped to the poly vapour barrier.I think some of the plastic electrical boxes maybe "airtight" and don't require additional poly.

 

[Steve in Mi]

Is the plastic going to cause a fire hazzard or other problems?

I think the plastic box and the plastic film will be of equal threat to burning/melting should they come in contact with flame, however, the PVC box will give off a highly toxic smoke. Poly film (polyethylene) is not a bad actor smoke-wise but it is good fuel for a fire.