Insulation selection for heaters

[11Haze29]

Wiring and industrial control cabinet for a plastic extruder. The extruder has electric heaters. The inside of the cabinet is room temp, but the termination at the heater element could be higher because of the radiated heat. I don't think THHN or 90C cable would be the right choice. Is there a 150 or 200C cable in 14-10 awg that is readily available?
thanks

 

[Volta]

Wiring and industrial control cabinet for a plastic extruder. The extruder has electric heaters. The inside of the cabinet is room temp, but the termination at the heater element could be higher because of the radiated heat. I don't think THHN or 90C cable would be the right choice. Is there a 150 or 200C cable in 14-10 awg that is readily available?
thanks

I've occasionally found high-temp wire at restaurant equipment supply shops that the electrical wholesalers didn't stock.

 

[jbelectric777]

Derate according to ampacity reductions found at the bottom of your ampacity table.

 

[dicklaxt]

I assume you are not speaking of process heaters, are you?

The low wattage strip heaters used in cabinets to keep humidity and condensation at bay are usually not over the standard 120 volt,90C wire requirements unless you have gotten something special.

dick

 

[11Haze29]

No, these are barrel heaters around the extruder to heat and melt the plastic as it enters.