new insulation effect on heat gain

[hankstir]

With the increase in the use of foam insulations,blown or 2 part exspantable, have any studies been done on the effect they may have on romex insulation breakdown or heat retention in the wire itself.

Many of these instalations are being done and to this point I have no more to go on than assurances that it will be ok by the installers of the foam.
Are we going to see new de rating tables for romex, mc ,uf or other systems encased in foam?

 

[electricmanscott]

With the increase in the use of foam insulations,blown or 2 part exspantable, have any studies been done on the effect they may have on romex insulation breakdown or heat retention in the wire itself.

Many of these instalations are being done and to this point I have no more to go on than assurances that it will be ok by the installers of the foam.
Are we going to see new de rating tables for romex, mc ,uf or other systems encased in foam?

Doesn't 334.80 address this?

 

[cadpoint]

Doesn't 334.80 address this?

Welcome to the Forum

The OP would be better off to search here on MH site, the UL, or on the internet as to a correct answer.

This question has been asked before! It's frankly a mess, IMO

I don't believe the NFPA-70 correctly address foam as a thermal insulation
as opposed to foam as a "sealing foam" as mentioned in Article 334.80.

If you want to run with any code reference 334.10 (B) would be the closer to a answer than a 334.80. IMO

But also one look at all of 334.10, also cross links to (read all of) 334.12.

I'd read all the links to the Article's, good luck.

BTW, some of the above article seem to contradict themselves, if you read them in the order
I gave them, again IMO...