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Different Voltage Cable Clearances

Different Voltage Cable Clearances

Different Voltage Cable Clearances

(OP)
We have 480V, 4.16kV and 34.5kV cable trays. 480V and 4.16kV cable trays are layered wherein the 4.16kV cable tray is on top of 480V cable tray spaced at 300mm vertically between top of 480V cable tray to bottom of 4.16kV cable tray.

However, when the 4.16kV and 480V cable trays enter the substation, they are near the 34.5kV cable tray horizontally. What is the recommended horizontal clearance between the 4.16kV/480V 2-layered cable trays and the 34.5kV cable tray?

Thanks for any recommendations and reference.

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