Help me decide what I need

An overloaded circuit can heat up to extreme temperatures creating a serious fire hazard and a threat to life and property. To protect against an overload, make sure that the power your equipment needs does not surpass the amp rating of the breaker(s) feeding your area. To calculate your overall needs, multiply the amp requirements of your equipment by the voltage of the circuit or:
 
Products Amps X Product Voltage = Product Wattage

For a typical 120 volt circuit, with a 20 amp breaker, you will be provided 2400 watts capacity.  The total load from your equipment should not exceed 80% of this total, or 1920 watts, per 20 amp breaker.

To determine how much power you need, calculate the load of all the devices you will be plugging into your circuits. Add the watts drawn by each device, for example, a circuit with 2 x blenders (600 Watts), 4 x 45" LED TV (180 Watts) and six lamps with 60 watt bulbs (360 Watts) adds up to 1140 watts if all these devices are running at the highest speed, all at the same time. This is only 60% of the available capacity for a 20 amp/120 volt circuit, so you are safe with those requirements.  However, if you wanted to add a microwave (1500 watts) to this same system, then you would surpass the 1920 watt threshold and require an additional 20 amp, 120 volt electrical outlet.

Finding the Amperage/Wattage for Products

The amperage/wattage rating information for a particular device may be on a label or imprinted on the back/bottom of the product.

If no amperage/wattage rating is displayed, the chart below lists common household appliances and the average watts drawn for each to aid in calculating the load of a circuit.

 
Electronics Watts Amps
Boombox 10 0.1
Cable TV Box 20 0.2
CD Player 10 0.1
Clock 5 0.0
Desktop Computer 150 1.3
DVD Player / DVR 30 0.3
Laptop 60 0.5
LCD TV - 19" 22 0.2
LCD TV - 32" 70 0.6
LCD TV - 45" 135 1.1
LED TV - 19" 20 0.2
LED TV - 32" 55 0.5
LED TV - 45" 90 0.8
Modem 7 0.1
PA System 2000 16.7
Phone Charger 5 0.0
Plasma TV - 19" 80 0.7
Plasma TV - 32" 160 1.3
Plasma TV - 45" 300 2.5
Play Station 150 1.3
Printer 50 0.4
Radio  10 0.1
Router 10 0.1
Satellite Dish 30 0.3
Stereo System 60 0.5
Wii 45 0.4
Xbox 360 160 1.3
Appliances Watts Amps
Blender 300 2.5
Blow Dryer 1500 12.5
Box Fan 200 1.7
Broiler 2000 16.7
Can Opener 100 0.8
Circular Saw 1400 11.7
Clothes Iron 1100 9.2
Coffee Maker 1500 12.5
Crock Pot 200 1.7
Curling Iron 90 0.8
Deep Fryer 1500 12.5
Drill 1000 8.3
Electric Kettle 2000 16.7
Hot Plate 1200 10.0
Microwave 1500 12.5
Mixer 100 0.8
Portable Heater 1500 12.5
Table Fan 25 0.2
Toaster 1200 10.0
Toaster Over 1200 10.0
Typical New Refrigerator 400 3.3
Vacuum Cleaner 1400 11.7
Waffle Iron 1200 10.0
Warehouse Fan 1000 8.3
Lighting Watts Amps
1000 Watt Light Bulb 1000 8.3
500 Watt Light Bulb 500 4.2
100 Watt Light Bulb 100 0.8
75 Watt Light Bulb 75 0.6
60 Watt Light Bulb 60 0.5
60 Watt Equiv. CFL Bulb 15 0.1
60 Watt Equiv. LED Bulb 10 0.1
4' Flouresent Bulbs (ea) 40 0.3
30' Christmas Lights 41 0.3
Typical Neon Light 600 5