View Full Version : Electrical Load Calculations
John Popoola
Jun 27, 2008, 07:41 AM
Electrical Load Calculations with all necessary factors
Washington1
Jun 27, 2008, 07:54 AM
Did you want us to make-up one?
NEC Article 220 presents the information needed for residential feeders, branch circuits, and service calculations.
For more info see these articles:
1. 430
2. 424
3. 440
4. 300
5. 210
6. 300
7. 230
8. 240
And a few others ;)
Washington1
Jun 27, 2008, 09:24 AM
To figure out the service or feeder size for dwellings (standard Method)***See NEC 220:
1. General lighting load 3VA per sq feet, one laundry circuit, and 2 small appliance circuits
2. Heat vs A/C **See NEC 220.60 and 220.51
3. Dryer **See Nec 220.54
4. Appliances **See NEC 220.53
5. Cooking Appliances **See NEC 220.55
6. Now size your service and feeder conductor: If the amps are 400 or less, and there is a 3 wire single phase 120/240v system, then size using Table 310.15(B)(6) If over 400 amps, then size per Table 310.16.
There is a lot more that goes into a demand Load calculation, and maybe someone will post a site that will help you along the way.
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stanfortyman
Jun 27, 2008, 01:01 PM
Electrical Load Calculations with all necessary factors
Considering you gave us NO information regarding this question Washington gave you all the answer possible.
WHAT is your actual question??
shader
Jun 27, 2008, 01:42 PM
Hmmmm, sounds like a homework question...