Electrical question

[Hassin Bin Sober]

12. Are your wires in conduit, flexible metallic cable or non-metallic cable (romex)?

I didn't see the question answered up-thread.

If your wires are in conduit or metallic cable, you can ground the conduit/flexible cable - that, in turn would ground the junction boxes (they would have to be metallic as well) and any new receptacle plugs installed in metal boxes.

If you are all romex then you are out of luck (unless you have conduit and can pull new wire).

I know a lot of the older homes were done in either conduit or flexible metallic cable.

Here in Chicago and Cook County, even residential electrical is required to be piped in conduit. We don't have to run a third wire because the conduit is grounded at the service entrance (to a rod in the ground and the plumbing).

When the receptacle/plug is fastened to the junction box we are automatically grounded upon contact with the box. Therefore the green ground screw and/or any ground wire on a switch or dimmer is not required