How You Can Select The Correct High-Temperature Insulated Wire
High-temperature insulated wire isn't a one-size-fits-all product. Based on the application, various factors will go into choosing the right type of wire to get the job finished right. On this page, we'll take a closer look at what these factors are and just how they can aid in selecting the best high-temperature insulated wire for ones specific situation.
Factor #1: Concise explaination Electrical Requirements - Operating voltage, conductor temperature rating and current-carrying capacity (aka ampacity) must be met when selecting high-temperature insulated wire. Such wiring is labeled using a temperature rating, that is dependant on a variety of ambient heat and current-generated heat. Ambient heat comes from the application form being performed whereas current-generated heat is calculated by matching conductor material and diameter to service amperage. You will need to note that due to difficulty in pinning down exact current-carrying capacity, product designers often specify higher capacity conductors than theoretical calculations would indicate.
Factor #2: Environmental Conditions - What is happening in the wire is not only consideration in relation to selecting the most appropriate high-temperature insulated wire. External environmental factors may also be important. That's because they are able to use a damaging effect on the two wire's insulation and its interior circuitry. Ambient heat, moisture, abrasion, thermal stability, chemical attach, mechanical abuse, cold, flame resistance, ease of stripping terminating and routing are all environmental conditions that has to be paid for when choosing high-temperature insulated wire. Many of these factors are discussed in depth further on in this post.
Factor #3: Conductor Material Type - The wire's conductor material determine the absolute maximum temperature it could withstand. Situations that need the wire to endure the best of temperatures, like high-rise alarms in case of a hearth, will be more reliably served with nickel-coated copper and nickel conductors, each of which can endure temperatures as much as 550 degrees Celsius. Copper, nickel-plated and iron conductors conversely can take up under only a maximum array of 200 to 250 degrees Celsius.
Factor #4: Current-Carrying Capacity or Ampacity - Some of the environmental conditions stated above also have an impact on high-temperature insulated wire's capability to carry current. Because of this, they should be weighed to the equation. Ampacity is measured since the current a conductor can hold ahead of the combined temperature of both conductor and insulation rises over a permitted limit.
Conductor size and material, amperage, ambient temperature and insulation type will all play a role is the wire's ampacity. The conductor's diameter and mass are the most influential size considerations. Small they may be, the lower the high-temperature insulated wire's ampacity. As previously stated in the Factor #3 section, a conductor's material carries a strong bearing on how much temperature the wire can withstand and that temperature range varies widely. Likewise, various materials produce wide fluctuations in the current-carrying capacity of the wire also.
Finally, the insulation utilized in the wire will determine simply how much heat it dissipates and, in turn, the ampacity. The dissipation problem becomes difficult when wire is enclosed inside a tightly confined space, so fire alarms in high-rise ductwork, as an example, pose additional challenges when looking for high-temperature insulated wire options.
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