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Messerke

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I would like to know if there are some type of conductor insulation better for extreme cold temperatures. I work on blast freezer projects and the THHN insulation seems to split a crack in this application.
Thanks,
 
If it is just the outer clear plastic, having it freeze and break off is OK. According to UL, the outer covering is simply to aid in the pulling of conductors. I too have had my share of it breaking off.
 
I agree with Ryan in about the plastic jacket being nothing to worry about unless you need the gasoline resistance it provides.

But cold THHN is tough to work with, I suggest trying out some TFFN.
 
iwire said:
I agree with Ryan in about the plastic jacket being nothing to worry about unless you need the gasoline resistance it provides.

But cold THHN is tough to work with, I suggest trying out some TFFN.
Click to expand...

Where do you use TFFN? It is only permitted as fixture wire.

Edit: Fixture wire and control work.
 
ryan_618 said:
control work.
Click to expand...

I am figuring an industrial 'blast freezer' will have control work. :)

I had to do some wiring in an ice cream hardening room and it had conveyors and refrigeration controls.

LFMC had to be kept in the warmer 0 F area, cut and bend it there then run it into the hardening room which was very cold, I can not remember how cold. If you tried to bend the LFMC in the hardening room it would turn into beautiful FMC.
 
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