non-shielded MV cable vs Bare Cable

[jstpie5]

We have an underground 35kV MV-105 ckt coming up a pole being terminated in a stress cone on top of a power pole to feed fused cutout.

The end user wants to add 2 sets of cutouts on adjacent poles.

The plan was to bring the MV-105 cables up near the switch and install stress cones then add a bare jumper from one stress cone to another then over to the fused cutout.

The client wants jumpers to be insulated non-shielded cable because they are worried about corrosion / contamination.

We are looking at using an EPR insulated 35kV jumper cable, but I wanted to ask the group if there was a better choice. Any opinions out there?

 

[electrofelon]

It seems strange to worry about corrosion considering the hundreds of thousands of miles of bare AAC/ACSR that's been up on poles for half a century..... But if the client can't be dissuaded, what about just using a covered conductor, such as "tree wire"? Doesn't seem like you need anything 35 KV rated. Can you even get a 35 KV non-shielded conductor?

 

[jstpie5]

Thanks for the reply. I cant help but agree with your sentiments about corrosion. I made the same argument. They only thing I could find that was 35kV rated was and EPR cable but I've never seen anything like that done before. I will look into the "tree wire" further. thanks!