Originally posted by Retro:

Originally posted by crispb:

how i did mine. iron and dvergr walls also stop the sparks. can't have building pieces like stone clipping thru the refinery or it acts as part of it and just phases through.

https://steamcommunity.com/sharedfiles/filedetails/?id=2898839138

.... it's a gosh dang Faraday Cage. Brilliant.