Convert one 240v to two 120v circuits?
I have a 240 volt circuit (12-3 with ground) that currently serves wall heaters (1800 watt) in two bathrooms. The wiring is generally inaccessible except where it comes into the bathrooms. I'm planning to remodel one bath and will no longer need an electric heater. Can I convert the heater in the other bath to 120 volt use (say using the red wire as load) and use the black wire for a separate circuit in the other bath (using the black wire as load)? If I can do this, could I use a GFI receptacle on the black wire circuit?
Correction and better information of my answer to a post
It was brought to my attention that a statement I made regarding the grounding of a neutral may be confusing.
I said:
"A true neutral, wired correctly, is intentionally grounded at several locations, to insure the neutral conductor of a system is at zero potential."
What I should have stated is is that the neutral is intentionally grounded at several locations BEFORE coming into a building, along with one ground point in the building.
Once in a building panel, that is the last ground point allowed, and is referred to as " Single Point Grounding". All wiring in a building is to be connected so that all neutrals and equipment grounds are brought back to the main neutral, and that no other "grounds" beyond the main panel are allowed.
Explaining why may be even more confusing so I will leave it at that. If a more detailed answer is need for a specific reason, ask and we can go from there.