Hello Friends,
50130-4 Section 13 prescribes testing cables with a length of < or = 2
meters. It further states that if a screened cable is used, then a 20 meter
length shall be tested. I assume the length is related to establishing
sufficient coupling of the surge signal on the screen to the inner
conductors.
My questions are:
1) If my system contains screened cables that are less than 20 meters in
length, does that mean that the screened cables are exempt from surge
testing?
2) If (1) is true, then where does one draw the line -- 10 meters? 19.9
meters?
What are your thoughts?
Best regards,
Don Umbdenstock
Sensormatic
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