What is the rule of thumb for calculating total demand for small appliance loads in kitchens?

The guideline for calculating total demand for small appliance loads in kitchens emphasizes the use of two 20-amp circuits. This recommendation is based on the National Electrical Code (NEC) requirements, which suggest that kitchens should have a minimum of two separate circuits to power countertop receptacles, ensuring that there is adequate capacity for multiple appliances that may be used simultaneously.

Using two 20-amp circuits allows for a 16-amp load on each circuit, offering headroom to accommodate the diverse electrical needs of kitchen appliances like microwaves, toasters, and blenders. This approach not only ensures safety by minimizing the risk of circuit overloads but also enhances convenience, as it provides flexibility for appliance usage without tripping breakers.

The other options, while aimed at addressing kitchen loads, do not meet the NEC recommendations as effectively. A single 15-amp circuit would not provide sufficient capacity for the range of appliances likely to be used at the same time. A 30-amp circuit is more suited for major appliances but fails to accommodate smaller loads efficiently. Lastly, three 15-amp circuits may offer more outlets but still lack the capacity and design considerations that the two 20-amp circuits accomplish for small appliance demands.