Answer:
The landlord does not have to do any rewiring for you. The landlord has the obligation to make the place basically habitable. That's all. If the severe problems affect the usability of the house, like having no lights, getting shocks, or the heaters not working, you can force the landlord to deal with it. Much simpler, though, is to move. Having livability issues with the house may be grounds to break the lease in your state.