CSLB C-10 Electrical ContractorPlanning and EstimatingEasy
A client requests a material takeoff for a new residential kitchen. The plans specify a 20A, 120V small-appliance branch circuit. How many duplex receptacles are typically included in the material calculation for a single small-appliance branch circuit in a kitchen, according to general residential wiring practices and the NEC?
- A8
- B2
- C4
- D6
Show answer & explanationAnswer & explanation
Correct answer: C. 4
While the NEC doesn't specify an exact number of receptacles per small-appliance branch circuit, it requires at least two 20A circuits for kitchen countertop and dining areas. Common practice and load calculations often allocate roughly 4-6 receptacles per 20A circuit, making 4 a plausible minimum for material takeoffs.
Why the other options are wrong
- A. 8 receptacles on a single 20A circuit is generally excessive and risks frequent overloads.
- B. 2 receptacles might be insufficient for a typical kitchen layout.
- D. 6 receptacles, while possible, might push the load limits of a single 20A circuit depending on appliance usage.
Small-Appliance Branch Circuit
A 20A, 120V circuit dedicated to supplying receptacle outlets in kitchen, pantry, dining room, and similar areas for small appliances.
- NEC requires at least two 20A small-appliance branch circuits for dwelling unit kitchens.
- These circuits serve countertop receptacles, dining area receptacles, and typically exclude lighting or other fixed appliances.
- Each circuit is typically assumed to serve multiple receptacles, but the exact number isn't rigidly defined by NEC.
Memory trick: Kitchen outlets: 'Two' circuits, 'Many' spots for small appliances.