Iam doing the electrical on a kitchen remodel we pulled a permit.theres an existing 10-2 romex for the old cooktop its a gas/elec combo.Had a 3 wire cord and recp.The new appliance is a 30 also and has a jumper from the neutral and ground installed from the factory.My question is by the NEC do I have to make this a 4 wire deal and run a 10-3 all the way across the house seeing its not new construction and just a kitchen renovation.I know on a new house it has to be 4 wire but what about this situation.I know the neutral is just for the display and LED,s.And i would have normally just left the 10-2 left the factory installed jumper on .But the contractors kinda goofy and the inspectors hard core.What is the nec say about remodels.Thanks evrybody.
Sparky
Sparky