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  • Rossen Buckner posted an update 1 month ago

    High-temperature insulated wire isn’t a one-size-fits-all product. Based on the application, different facets should go into choosing the proper form of wire to obtain the job finished right. On this page, we’ll take a closer look at what these 4 elements are and how they could help with choosing the ultimate high-temperature insulated wire for ones specific situation.

    Factor #1: Definition of Electrical Requirements – Operating voltage, conductor temperature rating and current-carrying capacity (aka ampacity) must all be met when choosing high-temperature insulated wire. Such wiring is labeled with a temperature rating, which is dependant on a mix of ambient heat and current-generated heat. Ambient heat is a result of the approval being performed whereas current-generated heat is calculated by matching conductor material and diameter to service amperage. It is important to note that because of the difficulty in pinning down exact current-carrying capacity, designers often specify higher capacity conductors than theoretical calculations would indicate.

    Factor #2: Environmental Conditions – What are you doing in the wire isn’t the only consideration when it comes to choosing the proper high-temperature insulated wire. External environmental factors will also be important. That is because they could have a very damaging effect on both the wire’s insulation and its interior circuitry. Ambient heat, moisture, abrasion, thermal stability, chemical attach, mechanical abuse, low temperature, flame resistance, ease of stripping terminating and routing are common environmental problems that must be paid for in choosing high-temperature insulated wire. Many of these factors are discussed in greater detail further on on this page.

    Factor #3: Conductor Material Type – The wire’s conductor material will determine the most temperature it may withstand. Situations that want the wire to disclose the greatest of temperatures, like high-rise alarms in case of a hearth, could be more reliably served with nickel-coated copper and nickel conductors, as both versions can endure temperatures up to 550 degrees Celsius. Copper, nickel-plated and iron conductors however holds up under only a maximum variety of 200 to 250 degrees Celsius.

    Factor #4: Current-Carrying Capacity or Ampacity – Several of the environmental conditions pointed out above have a direct impact on high-temperature insulated wire’s capability to carry current. Therefore, they have to be weighed into the equation. Ampacity is measured because current a conductor can transport prior to the combined temperature of both conductor and insulation rises above a permitted limit.

    Conductor size and material, amperage, ambient temperature and insulation type will all may play a role will be the wire’s ampacity. The conductor’s diameter and mass include the most influential size considerations. The smaller they are, the lower the high-temperature insulated wire’s ampacity. As previously stated in the Factor #3 section, a conductor’s material has a strong bearing on just how much temperature the wire can withstand which temperature range varies widely. Likewise, various materials produce wide fluctuations inside the current-carrying capacity with the wire as well.

    Finally, the sort of insulation employed in the wire determine the amount heat it dissipates and, consequently, the ampacity. The dissipation problem becomes difficult when wire is enclosed within a tightly confined space, so fire alarms in high-rise ductwork, by way of example, pose additional challenges when looking for high-temperature insulated wire options.

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