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HV underground cable distances

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Brian2024

Electrical
Jun 6, 2024
1
Hi all,

Anyone know what standard distances required between 220/275/330kV underground cables.
Between phases and between circuits?

Thanks.
 
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See NESC Rule 353. Deliberate separations—Equal to or greater than 300 mm (12 in) from underground structures or other cables.
The distance between cables it is the distance between cables of different circuits.
The minimum distance between cables of the same circuit may be zero. What is important is the ampacity.
According to Rule 354 if the distance is less than 300mm the voltage shall be no more than 22 kV.
 
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