Do I need a three-prong or four-prong range cord?

That depends on the outlet in your kitchen. Homes built before 1996 often have three-prong NEMA 10-50 outlets, while newer homes have four-prong NEMA 14-50 outlets with a separate ground. Match the cord to the existing outlet.

Can I convert a three-prong range outlet to four-prong?

Yes, if the circuit wiring includes a separate ground conductor. An electrician can replace the outlet and install a four-prong receptacle. If the existing cable has only three conductors, rewiring may be required.

Why do ranges not come with a cord included?

Manufacturers sell ranges without cords because outlet configurations differ between homes. The homeowner or installer selects the correct cord type to match the existing outlet.

How do I attach a range cord to the terminal block?

The cord terminals bolt to marked posts on the range terminal block. The center terminal connects to neutral, the outer terminals connect to the hot legs, and on a four-prong cord the green terminal connects to the appliance frame ground.

What gauge wire is inside a range cord?

Most 50-amp range cords use 6-gauge conductors. The cord must be rated for the circuit amperage, and the gauge is printed on the cord jacket along with the voltage and amperage rating.

Range Cord — Three-Prong and Four-Prong Stove Power Cords

A range cord is a heavy-duty power cord that connects a freestanding electric range or oven to a 240-volt wall receptacle.

Range Cord diagram — labeled parts and installation context

What It Is

A range cord carries 240-volt power from the wall outlet to the terminal block on the back of an electric range. It is a flexible, heavy-gauge cord set with a molded plug on one end and individual ring or spade terminals on the other end for connection to the appliance. Range cords are sold separately from the appliance because outlet configurations vary between homes built in different eras.

The cord contains three or four insulated conductors, each rated for the full amperage of the circuit, enclosed in a durable SRDT (service rated, dryer/range type) outer jacket. The jacket is typically black rubber or thermoplastic rated for 50 amps at 125/250 volts. Each conductor is color-coded: red and black for the two hot legs, white for neutral, and green for ground on four-prong versions.

Types

Three-prong range cords fit older NEMA 10-50 outlets, which combine neutral and ground on one pin. This configuration was standard in homes built before 1996 and is still legal as an existing installation but is no longer permitted for new work under NEC 250.140. Four-prong range cords fit modern NEMA 14-50 outlets, which have separate neutral and ground conductors, providing a dedicated equipment ground that improves safety.

Both types are available in four-foot and six-foot lengths. The six-foot length is more common because it allows the range to be pulled away from the wall for cleaning without unplugging. Cord amperage ratings are either 40-amp or 50-amp depending on the circuit and receptacle. Most modern ranges require a 50-amp circuit, but older or smaller units may operate on a 40-amp branch circuit.

Where It Is Used

Range cords are used behind freestanding electric ranges and ovens in kitchens. The cord connects at the appliance terminal block, located behind an access cover on the lower back panel of the range, and plugs into a dedicated 240-volt receptacle on the wall, typically located low on the wall behind the appliance or recessed into the cabinet space.

Slide-in and drop-in ranges that are hardwired to a junction box behind the unit do not use a range cord. Only freestanding models with a terminal block and a cord-and-plug connection require this component.

How to Identify One

A range cord is a thick, flexible black cable approximately 3/4 to 1 inch in diameter with a large three-prong or four-prong plug on one end. The appliance end has bare ring or spade terminals that bolt to the range terminal block using 1/4-inch or 5/16-inch screws. The cord is noticeably heavier and stiffer than a standard 15-amp appliance cord, reflecting its 6-gauge or 8-gauge internal conductors.

The plug face of a NEMA 14-50 four-prong cord has two angled flat blades for the hot legs, one straight flat blade for neutral, and one U-shaped ground pin. A NEMA 10-50 three-prong plug has two angled flat blades and one straight blade but no separate ground pin.

Replacement

Replace a range cord when the plug prongs are pitted or burned, when the cord jacket is cracked or damaged, or when changing between a three-prong and four-prong outlet configuration. The cord amperage rating must match or exceed the circuit breaker and receptacle rating. When switching from a three-prong cord to a four-prong cord, the bonding strap or wire between the neutral terminal and the range frame must be removed so the separate ground conductor carries fault current instead of the neutral.

Always de-energize the circuit at the breaker before attaching or removing a range cord. Torque the terminal screws firmly to prevent arcing at the connection, and ensure the strain-relief clamp at the cord entry point is tight enough to prevent the cord from being pulled out of the terminal block.