Where Can You Use 90°C Insulated Cable?

In this video, we discuss XLPE insulation, and how it provides a higher operating temperature of 90°C compared to PVC, which has an operating temperature of 70°C.

Electricity running through a conductor causes heat, and the more current flowing through it, the hotter it gets. Because electricity is dangerous, we cover our conductors with insulation - made from various materials such as PVC, XLPE, silicon, and even minerals like magnesium oxide.

However, these insulators have their limits and start to degrade or melt when subjected to temperatures beyond a certain point. For instance, PVC starts melting at temperatures higher than 70°C, while XLPE can withstand up to 90°C.

In this video, you will learn the uses for XLPE cable, the importance of ensuring that your electrical equipment is rated to operate at the same temperature as your installed cable and a method to make use of the extra current carrying capacity of 90°C cable to save you money.


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Time Stamps ⏱
00:00 Where can you use 90°C insulated cable
00:47 Lets refresh ourselves on the basics
01:51 Where do you come across XLPE?
02:00 information on how much current 90°C insulated cables can handle.
03:42 Max operating temperatures also apply to conductors in switchgear and wiring accessories
04:46 You have to check if the electrical equipment you're connecting to is rated at the same temperature
05:28 The 70°C Limit is met if the live conductor size is chosen based on the current rating for 70°C cables of similar construction
06:15 We can make use of the extra current carrying capacity of 90°C cable
07:10 This can be a cheaper installation option
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#cables #electricians #electricalinstallation