Minimum spacing requirments in U shaped Bus

[mull982]

Are there any spacing requirements for a 13.8kV insulated busbar that is ran in a "U" shape in order to accommodate a connection between two points?

The particular application I am referring to is a busduct application where some custom "U" shape buswork had to be made in the tapbox in order to connect transformer bushing to incoming busduct.

The buswork is 13.8kV 3000A bus that will be insulated with 130C tape.

Is there a spacing requirement between both sides if the "U" even if they are on the same phase? Will there be any corona or arcing? I don't believe there would be due to the fact both points will be at the same potential?

 

[Jraef]

Both sides of the "U" on the same phase? No, in fact they can be touching.

But ALL of your phase-to-phase and phase-to-ground clearances must remain intact regardless of shape.

 

[mull982]

Both sides of the "U" on the same phase? No, in fact they can be touching.

But ALL of your phase-to-phase and phase-to-ground clearances must remain intact regardless of shape.

Yes both sides of “U” are same phase/same bus.

The concern by others was corona, arcing, spitting, across the U due to small gap.

I agree that if same phase and same potential, current will take path of least resistance around the U. The concerns listed above would only be between different phases or phase to ground.