Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, concerning the fault ratings of tri-rated cable, is answered by Draka:
Question: I've been asked by a customer to supply him the fault ratings of tri-rated cable, but I cannot find them and my supplier does not have them. Can you help?
Answer: The maximum short rating current is based on a temperature rise from 90oC to 160oC.
The calculation for a one second short circuit is: conductor CSA x k
(where k = 100).
Ratings for other durations (t): conductor CSA x k / square root 't'
To see many more Q & A in Voltimum UK's Experts Area, please click on the link: www.voltimum.co.uk/consult.php?universe=consult.index.questions
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