Silicone Insulated wire.

[Inteificio]

Hi,

A question that should be simple, is killing me.

I have literally been researching this for months for no result; so if anyone even knows someone who knows the answer; or somewhere I could get the info please help.

We are currently using silicone insulated wire at work, a lot of it.
This is the stuff regs say we should be wiring domestic boilers with.

The issue is I am not running it in free air with an ambient of 30!
I am running it in trunking with multiple circuits and an ambient up to 85 degs.

I have no clue how to rate it, which worries me.

The stuff we use is specifically SIAF, which is glass fibre coated silicone, it can take 140 deg conductor temp. The glass fibre is usefull because even if the silicone incinerates, the glass will hold it in place maintaining insulation (just don't expect to be able to bend it much afterwards)

If there is a way to rate SIAF that would be great, but that is quite specialist stuff, even the way of rating normal silicone wire would be great.

No one seems to know how to answer this, so even if you have a slight idea it would be a great help.

 

[malcolmsanford]

http://www.eland.co.uk/documents/High_Temperature_%20Silicone_Cables.pdf

Is any of this information any good as it gives you seems if gives you the temperature, resistivity and current carrying capacity, but not the VD. Hope it helps

 

[Inteificio]

I have been asking this question for months and that is the first response I have got, you are a star.

That is a lot of the info I need, and I have a company to ask now!

I just need to know what they mean with their amp rating.
Is that at st&p, I need to know what it does at 85 degs, not 20.
What is the max acceptable conductor temp? is that the 140, or is that the max ambient to pull their listed amperage?




p.s. It gives you resistance, so you can calc volt drop for that

 

[malcolmsanford]

Hi Peter I have tried to dig out an old contact I had a eland but I think it must be in the UK. I have had several dealings with them mate and they have always been top notch so I'll guess their Tech Dept will be more than able to help you.

Yes mate if you have the load then you can work out the VD, Lol if I was honest P I didn't want to take it for granted you knew ohms law lol....sorry mate

 

[Inteificio]

"if I was honest P I didn't want to take it for granted you knew ohms law" - Quite a wise assumption, I am amazed the amount of sparkys I meet who do not know it.

I am a lot better at maths than electrics, so worry not if it gets complicated.