This is a similar problem to #15. Though, this issue is more of just a visual glitch. The pictures says it all, looks like the Mekanism cables get "cutoff" when put through a hollow cover. Currently using SC version 0.4.1.14 with forge 12.18.3.2185.

I'm closing this issue as part of a spring cleaning of my issue trackers from old stuff.

If you believe it's a bug that is still relevant in Minecraft 1.12 - Feel free to reopen it.