RCO Automated Rev1
RCO Automated Rev1
RCO Automated Rev1
Worksheet # 1
(Revised 01/09/08)
Conditions: Single family dwelling, heating load is larger than air-conditioning load.
(Heat Pump and/or Electric Space Heating)
(Based on NEC 220.82)
Service Demand
General Load:
First 10kw of Total Calculated Load (less HVAC) @ 100% 0 watts
Remainder of Total Calculated Load (less HVAC) @ 40% 0 watts
HVAC Load:
Nameplate Heat Pump Compressor load @ 100%
0 watts
(Volts X Amps = Watts)
Nameplate Electric Space Heating Load @ 65%
0 watts
(Nameplate Rating in watts X .65) ((NEC 220.82 (C)(4)(5))
0 watts
Service Demand
General Load:
First 10kw of Total Calculated Load (less HVAC) @ 100% 0 watts
Remainder of Total Calculated Load (less HVAC) @ 40% 0 watts
Total General Load 0 watts
HVAC Load:
Air Conditioning Load @ 100% (Volts X Amps = Watts) 0 watts
Furnace/Air Handler Load (Volts X Amps = Watts) 0 watts
Total HVAC Load 0 watts
HVAC Load
Compute the HVAC load and enter the LARGER of these air-conditioning or space heating loads.
Air Conditioning Load (Volts X Amps = Watts)
watts
Furnace/Air Handler (Volts X Amps = Watts)
OR
Electric Space Heating Load (Volts X Amps = Watts)
watts
(Central electric furnace, electric baseboard heaters, ceiling radiant heat, etc.)
OR
Heat Pump with Central Electric Furnace (Volts X Amps = Watts)
watts
(Nameplate rating of heat pump compressor plus electric furnace)
HVAC Load 0 watts
Service Demand
Total Computed Load (NEC 220.83)
First 8kw of Total Calculated Load (less HVAC) @ 100% 0 watts
Remainder of Total Calculated Load (less HVAC) @ 40% 0 watts
HVAC Load @ 100% 0 watts
Calculated Service Load 0 watts
* Where it is unlikely that two or more noncoincident loads will be used simultaneously, it shall be
permissible to use only the LARGEST load(s) that will be used at one time for calculating the total
load of the service.
IBI Residential Load Calculation Worksheet Elect. Permit No.
Worksheet # 4 continued
(Revised 01/09/08)
Other loads @ 100%
Examples are sump pumps, sewage pumps, whirlpool motors, attic fans, swimming pool equipment,
garage door openers, etc.
TOTAL List each appliance load separately. (For two and three-family dwellings, list the quantity of each and
QTY the sum of the nameplate ratings (in watts) separately):
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
15 TOTAL OTHER LOADS 0 watts
16 HVAC and OTHER TOTAL LOADS 0 watts
This optional calculation may be used for a three family dwelling if all of the following conditions are met:
(1.) No dwelling unit is supplied by more than one feeder.
(2.) Each dwelling unit is equipped with electric cooking equipment.
(See NEC 220.84 (A)(2) Exception if you want to use this optional calculation with gas cooking equipment)
(3.) Each dwelling unit is equipped with either electric space heating or air conditioning, or both.
STEP 1
(Required loads for dwelling units)
sq. ft. @ 3 watts sq. ft (Total all units) 0 watts
Small Appliance Circuits @ 1500 watts ea.
0 watts
(Minimum is 2 per unit)
Laundry Circuit(s) @ 1500 watts ea. (Minimum is 1 per unit) 0 watts
0 watts
TOTAL STEP 2
QTY List All Appliance Loads (Nameplate Ratings in watts) (Volts X Amps = Watts):
Ranges, Cooktops, Ovens TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Electric Water Heaters TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Electric Clothes Dryers - See * TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Gas Clothes Dryer Motors TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Dishwashers TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Disposals TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Appliances TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
0 watts
(* Electric dryers use 5000 watts each or nameplate ratings, total of all units )
IBI Residential Load Calculation Worksheet Elect. Permit No.
Worksheet # 5 continued
(Revised 01/09/08)
STEP 3
List All Other Loads (Nameplate Ratings - in watts) (Volts X Amps = Watts):
TOTAL (Examples: Whirlpool motors, attic fans, garage door openers, swimming pool equipment, sump
QTY pumps, etc.)
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
Other Load TOTAL of ALL units 0 watts
Unit #1 Unit #2 Unit #3
0 watts
STEP 4
Compute the HVAC load and enter the LARGER of these air-conditioning or space heating loads.
ENTER TOTAL OF ALL UNITS:
Air Conditioning Load (Volts X Amps = Watts)
watts
(Combined nameplate ratings of ALL A/C compressors plus ALL blower motors)
OR
Electric Space Heating Load (Volts X Amps = Watts)
watts
(ALL central electric furnaces, electric baseboard heaters, ceiling radiant heat, etc.)
OR
Heat Pump with Central Electric Furnace (Volts X Amps = Watts)
watts
(Combined nameplate ratings of ALL heat pump compressors plus ALL electric furnaces)
Total HVAC Load (all units) 0 watts
IBI Residential Load Calculation Worksheet Elect. Permit No.
Worksheet # 5 continued
(Revised 01/09/08)
STEP 5
Enter total of all loads as determined by Steps 1 through 4 0 watts
STEP 6
Compute the minimum size service required:
Total Watts (from step 5) Service Voltage = Total Amps
0 watts 240 volts = 0.00 amps
Multiply Total Amps by 0.45 (45%) =
Total Amps * 0.45 percent (45%) = Dwelling Units Demand Amps
0.00 amps * 0.45 = 0.00 amps
STEP 7
Enter House Loads in amperes: amps
(House Loads, if any, shall be calculated in accordance with Part III of NEC 220)
Describe house loads in the space provided below.