Intemp® 250

Intemp ® 250 with its flexible Nickel plated copper conductor, PFA Insulation, Glassfibre braid and heat resistant varnish is for use in more arduous high temperature industrial conditions.  With good moisture resistance, toughness and flexibility and of course, a continuous operating temperature of 250°C and a voltage rating 600/1000v;  as well as being easy to handle and easy to install it can still be terminated using nickel plated lugs and conventional crimping techniques. 

A high performance version of Intemp ® 250 is available with additional Glass Mica Tapes over the PFA.

For higher temperatures see PEAK Temp 260, 400 & 700

Construction: 

  • Flexible Nickel plated copper conductors
  • PFA (Perfluoroalkoxy) insulation
  • Glass fibre braided and heat resistant varnished overall

Intemp® 250 High Performance contains additional Glass Mica tapes over the PFA

Voltage: 600/1000v
Working Temperature: 250°C on the conductor
Minimum bending radius: 10 x Overall cable diameter

Application: For use in more arduous high temperature industrial conditions with good moisture resistance, toughness and flexibility and of course, a continuous operating temperature of 250°C.  As well as being easy to handle and easy to install it can still be terminated using nickel plated lugs and conventional crimping techniques. 

  Standard High Performance    
Nominal Size
mm²
Nominal Overall diameter
(mm)
Cable Weight
(Kg/Km)
Nominal Overall diameter
(mm)
Cable Weight
(Kg/Km)
Max. current rating for one cable in free air (ambient temp up to 80°C) AMP Max. conductor resistance

At 20°C   Ohms/Km    
1.0 2.89 21 3.89 24 25 20.0
1.5 3.14 25 4.14 29 40 13.7
2.5 3.57 35 4.57 39 54 8.21
4.0 4.08 49 5.08 54 74 5.09
6.0 5.98 88 6.98 97 98 3.39
10.0 7.15 131 8.15 141 135 1.95
16.0 7.88 180 9.38 197 180 1.24
25.0 9.17 259 10.67 280 240 0.795
35.0 10.88 380 12.88 412 290 0.565

Intemp® 250 will operate at a maximum continuous conductor temperature of 250°C.  In circumstances where the cable is not exposed to touch and does not run in contact with, or in the close vicinity of heat-sensitive materials, this enables it to be run at high ratings. Under these conditions it may be necessary to consider special fusing arrangements and since volt drop/power loss will be high this should be allowed for in the installations. 

Rating Factors

For Higher ambient temperatures the following factors must be applied:

Ambient temperature °C 100 120 140 160 180 200 220 240
Factor 0.94 0.87 0.80 0.73 0.64 0.54 0.42 0.24

When cables are enclosed a further de-rating of 0.8 must be applied.  When cables are grouped together and touching, the following factors apply:

No. of cables in group 2 3 4 5 10 15 20 25
Factor 0.8 0.7 0.65 0.6 0.45 0.4 0.36 0.33