We recently purchased a house built in 1927. The main panel was updated to 200 amp. 75 % of the basement was finished and the master bedroom, main bath were re-done - each of them getting new wiring with Romex.
However as I am working on the rest of the house I am finding that the rest of the house has the original BX metal sheathing with cloth wrapped wires inside the BX. The condition of the wires seems to be ok but I am wondering if I should bite the bullet and update the rest of the house?
I know with BX it is important to make sure the metal sheath is grounded properly since that is the ground circuit, but I am uneasy about having an overloaded circuit heat up the cable and cause a fire.
If I upgrade.... it is possible for most of the new lines to be fished through the paster walls or do they all have to be opened up?
It is a 3 bedroom house about 1700 square feet, what would be a realistic budget to have this professionally done. (keep in mind that the basement, master bedroom and main bath are already done, so I have about 5 or 6 rooms left.
Thanks in advanced!