geouf.blogg.se - Commercial electrical panel load calculation spreadsheet

In addition to the sections found in NEC Art.220, there is additional information about load calculations in NEC “Annex D Examples”.įeel free to contact us with questions about residential load calculations. To calculate the required wattage rating needed to supply the subpanel, multiply the total wattage (from the square footage and appliance calculations) times 1.25 to get the adjusted load. The NEC provides many methods of computing loads for residential occupancies.

Calculate fixed electric space heating loads at 100 of the total connected load. You are welcome to use these worksheets with your square footage measurements, your additional loads, and your HVAC loads to quickly and accurately determine your service requirements. A commercial occupancy has 75 linear feet of fixed multioutlet assem.

Worksheet 5 uses the optional calculation found in NEC 220.84 and can be used for 3-family dwelling calculations (when the 3-family dwelling meets the qualifications of NEC 220.84).

Worksheet 4 uses the “standard” method of calculation (NEC 220.1 through 220.61) and can be used for two-family dwelling calculations.

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 added to an existing single-family dwelling.

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.

These worksheets are provided to help you comply with the requirements of the Residential Code of Ohio when preparing your load calculations.

The automated worksheets accompanying this page are based on only five of the permitted methods of calculation found in NEC 220.