Fire barriers when cable sizing

[Lc1]

Hi
I am hearing different things, some people have said no and some yes. Do rubber and foam fire stops through walls count as thermal insulation when cable sizing?

Thanks

 

[buzzlightyear]

Try cement .

 

[buzzlightyear]

The idea is to stop fire from speading to another part of a building .has long has it is flame proof .

 

[Lc1]

Thanks for this. If these were to be treated as thermal insulation the cable would need to be substantially larger, so as they are to stop the spread of a fire they do not require to be treated as thermal insulation when sizing a cable?

Thanks

 

[telectrix]

i would not think so, unless the cable is on it's limit, load wise.then the fire protection effect on thermal effects might be a consideration.

 

[Lc1]

Thanks I am hearing different things. But the majority of people I have spoken to say that tubber and foam fire stops are NOT treated as thermal insulation when cable sizing

Thanks

 

[Midwest]

Isn't a figure of 500mm mentioned in the regs, before insulation effects ccc?

 

[Toneyz]

Isn't a figure of 500mm mentioned in the regs, before insulation effects ccc?

Reg.523.9(page132)BYB table52.2.