cable rating
cable rating
(OP)
This is a stupid question, but how are cable ratings established? Is it based on the thickness of insulation or cable gauge size?
Does a 4kV rated cable mean 4kV peak voltage? So can it actually take on 8kV of peak to peak voltage?
thanks
Does a 4kV rated cable mean 4kV peak voltage? So can it actually take on 8kV of peak to peak voltage?
thanks






RE: cable rating
Cable voltage ratings are typically ac rms values.
RE: cable rating
QUESTION 2:...So can it actually take on 8kV of peak to peak voltage?
There are cable with dual rating such as 5 kV with 133% insulation for ungrounded system and 8 kV with 100% insulation for grounded system as shown in the enclose link.
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RE: cable rating
Voltages are typically given as phase-to-phase, assuming the system is solidly grounded. For system that are impedance grounded (where ground offsets occur only during faults), 133% rated insulation is usually specified. Many engineers also specify 133% for solidly grounded systems for a little safety factor. For ungrounded system, use 173%.