Overload Classification of Secondary Network Cables Modified Test Procedure

This paper describes a new test procedure for determining the damage threshold temperature for secondary network cables. Present network cables generally have a maximum damage threshold temperature of 260°C and are protected by class L260 network limiters. The new procedure is considered suitable for evaluating cable designs for damage threshold temperatures up to 340°C, and adaptable for higher temperatures by increasing the rate of cooling of the conduit.

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