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.
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