I know what you're trying to do with the heat. I may be wrong but when you disconnect the line going to the heaters, such as the contactors, you must disconnect all ungrounded conductors that go to the heater. I think just by breaking one leg to the heater would be a violation. Someone later on would go to the heater, shut the thermostat off, and think the line is dead going to the heater. I was looking in the code
to back up what I had just said. I'll still search.
