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New cooktop is rated at 40 Amp, and new oven is 30 Amps. Existing range, which of course has both an oven and cooktop in a single unit draws 40 Amps. Existing line to the range is #8 wire connected to a 40 Amp breaker.
I'm doing the wiring myself, and my question is do I need to run a second 30 Amp line back to the entrance panel, or can both units be connected to the same 40 Amp junction box currently used by the range?