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Load Calculator
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Find this template at: www.naperville.il.us/loadcalculator.aspx Naperville Application # Address: Dwelling Unit Electric Service Load Calculation V1.8 220.12 General Lighting 3va/ft^2 of floor area, including unused space adaptable for future use. Floor Area= 0 ft^2 Basement Floor Area= 0 ft^2 220.52(A)Small Appliance Load 1500va for each 20 amp branch circuit required per 210.1(C)(1) in EACH ki room, dining room, or similar areas. # of Small Appliance Branch Circuits = 2 X 1500va= 220.52(B)Laundry Load # of Laundry Branch Circuits = 1 X 1500va= Total General Lighting & Appliance Load= 220.42 Lighting Load Feeder Demand Factors First 3000 or less at 100% From 3001 to 120,000 at 35% Remainder over 120,000 at 25% Total Lighting Demand Load= 220.54 Electric Clothes Dryers Dryer #1, Greater of Nameplate KW rating or 5 - kw Dryer #2, Greater of Nameplate KW rating or 5 - kw 220.55 Electric Ranges--Dwelling Units Electric Range Nameplate KW= - kw Wall Mounted Oven Nameplate KW= - kw Electric Cooktop Nameplate KW= - kw Electric Cooking Demand Load= 220.51 Largest of Fixed electric space heating loads or A/C load: 220.21 Non-coincident Loads Fixed Electric Space Heat # - w A/C#1 - Fixed Electric Space Heat # - w A/C#2 - Fixed Electric Space Heat # - w A/C#3 - Total Non-coincident Load= 220.53 Appliance load--Dwelling Units Qty Description va(watts) Qty Description va(watts) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Connected Appliance Load= 220.53 Appliance load--Dwelling Units Total Appliance Demand Load= 220.50 Motor Loads @ 120 Volts Qty Description Amps Qty Description Amps 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Total Motor Load= 430.24 25% of Largest Motor Load Total Motor Demand Load TOTAL CALCULATED DEMAND LOAD in Volt-amperes = MCA@208-2 MCA@208-2 MCA@208-2
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Transcript of Load Calculator
Find this template at: www.naperville.il.us/loadcalculator.aspx
Naperville Application #
Address:
Dwelling Unit Electric Service Load Calculation V1.8220.12 General Lighting Need Help?
3va/ft^2 of floor area, including unused space adaptable for future use.Floor Area= 0 ft^2 0 va
Basement Floor Area= 0 ft^2 0 va220.52(A) Small Appliance Load
1500va for each 20 amp branch circuit required per 210.1(C)(1) in EACH kitchen, pantry, breakfastroom, dining room, or similar areas.
# of Small Appliance Branch Circuits = 2 X 1500va= 3,000 va
220.52(B) Laundry Load # of Laundry Branch Circuits = 1 X 1500va= 1,500 va
Total General Lighting & Appliance Load= 4,500 va220.42 Lighting Load Feeder Demand Factors
First 3000 or less at 100% 3,000 vaFrom 3001 to 120,000 at 35% 525 vaRemainder over 120,000 at 25% 0 va
Total Lighting Demand Load= 3,525 va
220.54 Electric Clothes Dryers
Dryer #1, Greater of Nameplate KW rating or 5kw= - kw - w
Dryer #2, Greater of Nameplate KW rating or 5kw= - kw - w220.55 Electric Ranges--Dwelling Units
Electric Range Nameplate KW= - kwWall Mounted Oven Nameplate KW= - kwElectric Cooktop Nameplate KW= - kw
Electric Cooking Demand Load= #MACRO? w220.51 Largest of Fixed electric space heating loads or A/C load:220.21 Non-coincident Loads
Fixed Electric Space Heat #1 - w A/C#1 - Fixed Electric Space Heat #2 - w A/C#2 - Fixed Electric Space Heat #3 - w A/C#3 -
Total Non-coincident Load= - va220.53 Appliance load--Dwelling Units
Qty Description va(watts) Qty Description va(watts)0 0 0 00 0 0 00 0 0 00 0 0 00 0 0 00 0 0 00 0 0 00 0 0 00 0 0 0
Total Connected Appliance Load= - va220.53 Appliance load--Dwelling Units Total Appliance Demand Load= - va220.50 Motor Loads @ 120 Volts
Qty Description Amps Qty Description Amps0 0 0 00 0 0 00 0 0 00 0 0 0
Total Motor Load= - va430.24 25% of Largest Motor Load - va
Total Motor Demand Load - va
TOTAL CALCULATED DEMAND LOAD in Volt-amperes = #MACRO? va
MCA@208-240VMCA@208-240VMCA@208-240V
A1
Enter values into the shaded areas of the form, let the computer do the math.
A4
Lighting load for Specified Occupancies. A unit load of not less than that specified in Table 220.12 shall constitute the minimum lighting load. The floor area shall be calculated from the outside dimensions of the building or dwelling units. For dwelling units, the calculated floor area shall not include open porches, garages, or unused or unfinished spaces not adaptable for furture use.
J4
Instructions: 1. OPEN file in EXCEL. 2. ENABLE MACROS if prompted. 3. FILL in fields with applicable data. 4. SAVE file. 5. PRINT the worksheet. 6. SUBMIT worksheet with permit application. Questions? Contact James Tente by email at: [email protected] Please include this file as an attachment so I can help you.
H6
Enter the total square footage of all conditioned floor space.
H7
Enter the total square footage of all unfinished basement spaces suitable for finishing.
A8
In each dwelling unit, the load shall be calculated at 1500 volt-amperes for each 2wire small appliance branch circuit required by 210.11(C)(1). These loads shall be permitted to be included with the general lighting load and subjected to the demand factors.
H11
Enter the quantity of 20 amp small appliance branch circuits installed. Note: Only 2 are required but if more than 2 are installed then ALL must be included in calculation.
A12
A load of not less than 1500va shall be included for each 2wire laundry branch circuit installed as required by 210.11(C)(2). This load shall be permitted to be included with the general lighting load and subject to the demand factors provided in Table 220.24.
H13
Enter the number of 20 amp laundry branch circuits. Note: Only 1 circuit is required.
A15
The demand factors specified in Table 220.42 shall apply to that portion of the total branch circuit load calculated for general illumination.
A20
The load for household electric dryers in a dwelling unit shall be either 5000watts or the nameplate rating, whichever is larger, for each dryer served.
H21
Enter the nameplate kilowattage.
A23
The load for household electric ranges, wall mounted ovens, counter mounted cooking units shall be calculated in accordance with table 220.55
H24
Enter the nameplate kilowattage of electric cooking appliance.
A28
Fixed electric space heating loads shall be calculated at 100% of the total connected load.
A29
Where it is unlikely that two or more noncoincident loads will be in use simultaneously, it shall be permissible to use only the largest loads that will be used at one time.
E30
Enter the nameplate wattage of electric heat. i.e., baseboard heat, electric wall heaters, floor heating cables, etc.
H30
Enter the Minimum Circuit Amps (MCA) on manufacturer's specs or unit nameplate based on the nominal line-line system voltage.
A34
Nameplate ratings of all appliances permanently connected, fastened in place or intended to be on specific branch circuits.
A36
Enter the quantity of each appliance or select from the drop down list.
B36
Enter a description of the appliance or select from the drop down menu.
D36
Enter the volt-amps, or watts of the appliance as given on appliance nameplate. FYI: volt-amps or watts equals the nameplate amps multiplied by the nameplate voltage. i.e., 6.9amps * 120Volts = 828volt-amps.
F36
Enter the quantity of each appliance or select from the drop down list.
G36
Enter a description of the appliance or select from the drop down menu.
I36
Enter the volt-amps, or watts of the appliance as given on appliance nameplate. FYI: volt-amps or watts equals the nameplate amps multiplied by the nameplate voltage. i.e., 6.9amps * 120Volts = 828volt-amps.
A46
A 75% demand value is allowed where 4 or more of the above appliances are fastened in place, other than electric ranges, clothes dryers, air conditioning or space heating equipment. If applicable, the demand reduction will be calculated automatically.
A47
Motor loads shall be calculated in accordance with 430.24, 430.25, 430.26 and 440.6 for hermetic refrigerant compressors.
A49
Enter the quantity of each motor or motorized appliance.
B49
Enter a description of the motor or motorized appliance.
D49
Enter the nameplate amps for the motorized appliance.
F49
Enter the quantity of each motor or motorized appliance.
G49
Enter a description of the motor or motorized appliance.
I49
Enter the nameplate amps for the motorized appliance.
A54
Motors require an additional 25% to provide for inrush currents.
Find this template at: www.naperville.il.us/loadcalculator.aspx
TOTAL CALCULATED DEMAND LOAD in AMPS @ 1 Phase 3 Wire, 120/ 240 Volts = #MACRO? AmpsMINIMUM SERVICE REQUIRED #VALUE! AMPS SERVICE SIZE REQUESTED = 100 Amps
H58
The default system voltage is 240V unless this is for a dwelling unit located in a large multi-tenant building fed with 3 phase power.
Find this template at: www.naperville.il.us/loadcalculator.aspx
AmpsAmps
