Single Family Dwelling Electrical Load Calculation Worksheet

If you have gas appliances which require a 120v branch circuit include them here.

Single family dwelling electrical load calculation worksheet. Ac load at 100. The feeder for a two family dwelling unit is calculated using the standard method in part iii of art. Single family dwelling load calculation step by step example optional method cec 220 82. Nec standard method single family residential electric service entrance load calculator home site map safety contact me.

Compare the heating load to the ac load and take the larger of the two loads. Worksheet 1 heating load larger than a c load and worksheet 2 a c load larger than heating load use the optional calculation found in nec 220 82 for a new single family dwelling. The load calculator is divided into three main sections which enable you to enter the necessary information about the home project and the proposed electrical equipment that will be installed. Worksheet 3 uses the optional calculation found in nec 220 83 to compute the adequacy of the existing service when a room addition is built or other loads are.

Total square feet of dwelling. Of living space 1 15 kw electric range 3 small appliance branch circuits 1 5 kw wall mounted oven. Nec standard electrical load calculation for single family dwellings only for service ratings of 120 240v 225 amps max owner. A word about two family dwellings.

The residential load calculation worksheet calculates the electrical demand load in accordance with article 220 of the 2017 national electrical code. The calculations conform to the national electrical codes which focus on required loads and factoring in the appliance and motor equipment. Total floor area of dwelling nec 220 12 sqft. 29 amps x 240 volts 6 960 va.

Here is a sample problem. 14 kw range. Total square feet of dwelling total of small appliance branch circuits must be at least 2. Standard method for dwelling service calculations worksheet for the evitp using the standard method complete this worksheet to perform a service load calculation.

An example of standard loads is shown below. Refer to section 220 82 a b in the 2014 national electrical code nec. Total of small appliance branch circuits must be at least 2. When that calculated load exceeds the calculation for three identical units using the optional method of 220 84 the lesser of the two calculations is permitted to be used 220 85.

Enter plain numbers in cells without text or labels. To illustrate the method for sizing an electrical service. Free nec standard method single family residential electric service entrance load calculator. If you are preparing to take an electrical licensing exam you will need to know how to calculate the feeder or service load for a single family dwelling.