In order to complete the trial successfully, you must crawl through the 'pipe' slowly, if the edges turn red, slow down or you'll fail. Once you get out and need to gross the electric fence, it's best to use the camera to find which of the sides does not have electricity going through it (indicated by arcs going from generator to generator, this path will be much easier), although you can go straight to the goal if you want.
If you're playing on easy, you can mess up 3 times (assuming you took no damage in the 'pipe'), not sure about the higher difficulties though.
Video credit to the author.