Given: Ten baseboards heaters 240V: 2-1500W 2-2000W 2-2500W 2-1500W 2-2000W . What size type TW AWG wire is needed?

Given: Ten baseboards heaters 240V: 2-1500W 2-2000W 2-2500W 2-1500W 2-2000W . What size type TW AWG wire is needed?