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Mechanical rooms typically house the following equipment:
How many watts does it take to power basic
items in an average size house? |
In a typical home, essential items will average 5000 – 7500 watts of power to run.
What is the difference between running watts and starting watts?
Running, or rated watts are the continuous watts needed to keep items running. Starting watts are extra watts needed for two to three seconds to start motor-driven products like a refrigerator or circular saw, this is the maximum wattage the generator can produce.
Why is only one starting watt item used to calculate your total starting watt requirement?
Unlike running watts, starting watts are only needed during the ! rst few seconds of operation. In most cases, only one item will start or cycle at the same time, therefore this is the most accurate estimate.
What if I can’t determine the running or the starting watt requirement for a tool or appliance?
If the running watts are not on the tool or appliance, you may estimate using the following equation:
WATTS=VOLTS x AMPS
. Only motor- driven items will require starting watts. The starting watts required may be estimated at 1-2x the running/rated watts.
1 Major appliances|
2 Small appliances
The wattages given below are estimates. The actual wattage required for your appliances may differ from those listed. Check the nameplate on the appliance to determine the actual wattage required.|
* Appliances and tools with induction motors (marked * in tables) may require from 3 to 7 times the listed wattage when starting. The start-up load of the appliance or tool determines whether an inverter has the capability to power it. Be sure to check the specific wattage requirements and operating instructions for appliances / tools to be used.
|Appliance||Est. Watts||Appliance||Est. Watts|
|Coffee pot (10 cup)||1200||VCR||40-60|
|Coffee pot (4 cup)||650||CD or DVD Player||35|
|Cappuccino Maker||1250||Clock Radio||50|
|Coffee Grinder||100||AM/FM car cassette||8+|
|Microwave (600 to 1000 W cooking power)||1100-2000W (elec. consumption)||Vacuum cleaner||300-1100|
|Waffle iron||1200||Mini Christmas lights (50)||25|
|Hot plate||1200||Space Heater||1000-1500|
|Toaster Oven||1200||Washing machine||920|
|Blow dryer||900-1500||12" 3 speed table fan||230|
- pc & monitor
|TV - 25" color
- 19" color TV or monitor
- 12" b&w
13" color TV/VCR Combo
|*Refrigerator/Freezer||600||Game Console (X-Box)||100|
|*Freezer||500-800||*Furnace Fan (1/3hp)||1200|
|Tool||Est. Watts||Appliance||Est. Watts|
|Jig Saw||300||1/4" drill||250|
|Band Saw||1200||3/8" drill||500|
|Table Saw||1800||1/2" drill||750|
|6 1/2" circ. saw||1000||Shop Vac 5 hp||1000|
|7 1/4" circ. saw||1200+||*Sabre Saw||500|
|8 1/4" circ. saw||1800||*Portable Grinder||1380|
|Disc Sander||1200||*Electric Chain Saw 14"||1200|
|Makita Chop Saw||1550||*Airless Sprayer 1/2 hp||600|
|Makita Cut Off Saw||1000||*Air Compressor 1 hp||2000|
Pumps and Air Conditioners
|*Well Pump 1/3 hp||750||1400-3000||*7000 BTU to 10000 BTU
Running: 1000-1500. Starting: 2200-5000.
(A/C's are a very difficult load because of the high start-up surge. Use the Locked Rotor Amps to determine the start up surge requirement).
|*Well Pump 1/2 hp||1000||2100-4000|
|*Sump Pump 1/3 hp||800||1300-2900|
|*Sump Pump 1/2 hp||1050||2150-4100|
|Clothes dryer (electric)||3,400|
|Water heater (electric, 40-gallon)||5,000|
|Well pump (deep well)||700|