| > Does this mean i can connect both the green insulated and white insulated
> on new cooktop to white wire of old?
For three-wire installation, yes.
> Is there a method of checking whether the exising cable and metal
> junction box is grounded?
With the power to the circuit off, use your multimeter or ohmmeter to check for continuity between the white neutral wire and the metal box. Your metal conduit may actually provide a suitable ground. Can you identify if the existing cable is individual conductors in conduit or BX cable?
> If so, could the green wire be attached to the flexible conduit or the
> junction box?
It would be connected to the metal junction box by way of a self-taping green ground screw (available in the electrical aisle). __________________ Good luck with your project!  -Ben |