Ranges with rating of 8.75 kVA or more require a minimum branch circuit of what ampere rating?

Ranges with rating of 8.75 kVA or more require a minimum branch circuit of what ampere rating?

• A. 30 A
• B. 50 A
• C. 60 A
• D. 40 A

Answer: (D)

For sizing a range circuit, convert the range’s kVA rating to current and match it to a standard breaker size. An 8.75 kVA range equals 8750 VA. At the common residential supply of 240 V, the current is 8750 / 240 ≈ 36.5 A. Since breakers come in standard sizes, the circuit must be able to carry at least that much, so you pick the next standard size up, which is 40 A. Therefore, the minimum branch circuit rating is 40 A. (Note: if the supply were 208 V, the current would be about 42 A, which could push you toward a 50 A circuit, but the typical residential assumption is 240 V.)

For sizing a range circuit, convert the range’s kVA rating to current and match it to a standard breaker size. An 8.75 kVA range equals 8750 VA. At the common residential supply of 240 V, the current is 8750 / 240 ≈ 36.5 A. Since breakers come in standard sizes, the circuit must be able to carry at least that much, so you pick the next standard size up, which is 40 A. Therefore, the minimum branch circuit rating is 40 A. (Note: if the supply were 208 V, the current would be about 42 A, which could push you toward a 50 A circuit, but the typical residential assumption is 240 V.)