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The high rated temperature of the cable conductor is 90 ° C. In the event of a short circuit (with a long duration of no more than 5 seconds), the high temperature of the cable conductor does not exceed 250 ° C.
The high rated temperature of the cable conductor is 90 ° C. When a short circuit occurs (with a long duration of no more than 5 seconds), the high temperature of the cable conductor does not exceed 250 ° C.
The description of fire-resistant wires and cables refers to cables that can maintain normal operation under specified test conditions and burn in flames for a certain period of time.
In addition to the above standards, flame retardant cables are classified into three different flame retardant categories: A, B, and C according to the GB/T18380.3-2001 standard. The flame retardant performance of Class A is excellent, and users can choose according to their needs.
1. The long-term allowable working temperature of cable conductors shall not exceed 70 ℃; 2. During a short circuit (* * * lasting for no more than 5 seconds), the high temperature of the cable conductor shall not exceed 160 ℃; 3. The ambient temperature during cable laying should not be lower than 0 ℃.
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