Find the fusebox and open the door | Chapter 7: Torchlight Metro: LL Guide
Last update: 11 May 2016
Turn right, going to the unexplored part of catacombs. Ignore closed door along your way, entering the room located right to them. During exploration of this area look around for the hidden Artyom's diary page left by the corpse.
Stay alerted, because after few moments a group of radspiders will attack you. You can try to defeat these monsters or try to get to the fenced area shown on the above screen as fast as possible and light on the oil lamp then, thus ensuring a safe stop here. It is worth exploring this place, because you can find here some valuable supplies (ammo, medkits, etc.).
Keep going and prepare to deal with at least one radspider (you can also try to flee, using sprint). Your current target is a better lit area with a fuse box. Interact with it in order to restore power in the area.
Fortunately you do not have to return with the same way because the game will allow you to use the hole between grates shown on the screen. Jump down and return to Pavel. Once you enter the new room, the game will start loading the next chapter.