Is BX cable sufficient ground in itself?
We have moved into a new house that is a bit of a fixer-upper. We're remodelling the kitchen and need to add a few ceiling lights in bedrooms and the living area.
Most of the existing outlets are 2 prong and looking at the wiring we have BX / armoured cabling with no separate ground wire.
I would like to change out a number of the outlets to 3 prong. Is the ground from electrical box -> metal cable -> house ground, considered 'good enough'?
I'm half thinking I may as well get the electrician to replace everything while he's doing the kitchen electrics and the celiling lights, before we decoreate the house.