I have a new range cooker (newworld spirit 110DF) coming and need to run a new cable from the CU to the outlet box approx 20-30ft away, the power ratings for the twin ovens and the grill comes to a total of 6.5kW (2.7 for Dual circuit grill, 2.1 for one oven and 1.7 for the fan oven). I need to...