Range Cord Wiring, How to Install and Wire a 3Prong 240Volt Range Cord and a 4Prong 120/240Volt Range Cord, and How to Wire the 240Volt Range Outlets for a New Home or an Older Home. DIY Electrical Wiring from an Electrician. Complete with easy to understand wiring examples, and an easy to follow process which is explained by a licensed electrical contractor.