Wiring a Kitchen Oven - Electrical Wiring Circuit Black wire to Black wire of the Oven. Circuit Black with Red to Red wire of the Oven. Circuit Ground, Green or Bare wire with Oven Green or Bare. * It does not matter if the Black and Red wires are reversed with 240 volt oven wiring. * Some 4-wire ovens do permit bonding the White Neutral wire to the Ground wire. FISHER & PAYKEL OB30DDEPX1 SERVICE MANUAL Pdf Download. The product serial plate is located on the left-hand side behind the grill, between the control panel and the oven door (top oven door on dual oven models). 2.5 Model Number Descriptions, Product Code, Service Version The model number contains the following information: eg: OB30DDEPX1 Type OB = Oven - Built in Width..