Well, I don't think you really can 100% reliably protect electric circuits against environment effects. In real life I lose power occasionally, and I certainly don't live in a seat-of-the-pants space colony.
However, I have a suggestion that might make things more interesting:
- power-lines have durability that degrades over time (faster or slower depending on exposure of lines)
- as durability decreases, chance of Zzzzt increases; when durability is at 100% chance of Zzzzt is very small if not zero.
- durability can be repaired (and perhaps require additional resources if it decreases below some threshhold)
So, as long as colonists keep circuits in good repair, chance of Zzzzt becomes very small.
However, I have a suggestion that might make things more interesting:
- power-lines have durability that degrades over time (faster or slower depending on exposure of lines)
- as durability decreases, chance of Zzzzt increases; when durability is at 100% chance of Zzzzt is very small if not zero.
- durability can be repaired (and perhaps require additional resources if it decreases below some threshhold)
So, as long as colonists keep circuits in good repair, chance of Zzzzt becomes very small.