# How many watts can be plugged on 12-2 cable on 240V with a double breaker?

A #12 cable is rated at 20 amps however only 16 amps can be connected to this cable.

wattage = amperage x voltage

1920 watts = 16 x 120 (each leg)

### What happens to the resistance of a circuit when too many outlets are plugged into a 120 V outlet?

As more items are plugged into a circuit the resistance of the circuit rises. This is the same formula that you use for resistances in parallel. As each item is plugged into the circuit its resistance rises causing the current of the circuit to become higher. The breaker is in the circuit to protect the wire from overloading with the higher current . When an over limit of items are plugged in, the breaker trips…

### How many appliances can you run from an extension cable at once?

The total load applied to an extension cord is governed by the wire size of the cord. As the extension cord is usually plugged into a wall receptacle. The breaker protecting the receptacle is rated at 15 amps. The total wattage is limited to 15 x 120 volts = 1800 watts. Check the nameplate on the appliances to see what the wattage draw totals. This will give you the answer, any amount that adds up…

### How many watts can a 30 amp 120 volt breaker handle?

The connected load in watts to a single pole 30 amp breaker is calculated by the following equation. W = I x E. Watts = Amps x Volts. A higher wattage than what you calculate will trip the breaker. Also another equation you should be familiar with, for breaker sizing if only the wattage is given on the nameplate, is that for amperage from watts. I = W/E. Amps = Watts/ Volts.

### How much wattage is available in a 15amp breaker?

Wattage (power) is not stored in a breaker; in its tripped position, electrical power form the power line is disconnected. When the breaker is activated, electricity (power) flows through the breaker to the circuit in the home. Using the formula below, you can find the wattage the breaker can handle, not how much it has. Watts = Volts x Amps = 120 volts x 15 amps = 1800 watts A toaster requires 1500 watts of…

### How many watts can be on a 15amp breaker?

At 120 volts a 15 amp breaker can be loaded to 1800 watts before it will trip. If it is a continuous load then the electrical code states that it is only allowed to be loaded to 80%. This will be 1800 x .8 = 1440 watts. If the voltage is not 120 volts use the following equation Watts = Amps x Volts. Amps being the breaker size that is to be used.

### Should a hot water heater be put on a 30 single or 30 double amp breaker?

What governs the type of breaker is the voltage and wattage of the heater elements. If the tank is 120V then you would only use one breaker. The size of the breaker you use will depend on the watts of the element. Watts = amps x volts, Amps = Watts/ volts. Once you establish the amperage then size the wire and the breaker to fit. If the tank is 240V the same rules apply only…

### How do you calculate appropriate circuit breaker in the circuit for ac voltages?

It is depending on : whether the ac power is 110 or 220 v , length of wire/cable from mains to CB(circuit breaker),diameter of wire/cable consumption of circuit ( How much watts the circuit consume) i.e load .. don't forget this relation I=V/R . where I= current (amps) , V=voltage & R= resistance also I=P/V where P is power in watts . note that less voltage or thinner wire may affect the real rating of…

### How much can a 15W circuit breaker handle?

Answer for the US: Breakers are rated in amps, not watts. However, a 15A breaker can handle 15 amps, or about 1800 watts (using 120V), or 3600 watts (using 240V). However, this is only rated for noncontinuous loads (those not lasting for more than three hours). For continuous loads (loads lasting three hours or more), one must derate the circuit breaker by 80%. So for continuous loads, that same breaker should only have 1440 watts…

### What is the total watts that can be obtained from 240 volts and 30 amps?

7200 Watts, but that is only the trip value of the breaker. The circuit should only sustain 80% of the rated load, so a 240 volt 30 amp circuit can carry 5760 watts. answer 2 Both a circuit breaker and a fusible link are current operated, not wattage operated. So 7200 watts is the answer to the stated question. But the correct answer is 30A. HOWEVER if it is not a CB or fuse, but…

### What size breaker you would use for a 110 volt window air conditioning unit?

Breaker sizing is dependant on what the load amperage is that the breaker is connected to. If the amperage is not given but just the wattage, use this equation I = W/E. Amps = Watts/Volts. This air conditioner unit should be on a dedicated circuit receptacle. On these types of loads the conductor can only be loaded to 80% of the conductors rating. So a 15 amp breaker times 80% = 12 amps or Watts…

### How many watts will a 20 amp two pole breaker handle?

Answer for USA, Canada and countries running a 60 Hertz supply service. A two pole 20 amp breaker will handle 20 amps x 240 volts = 4800 watts. A single pole, two pole or a three pole breaker all have the same interruption capacity. The number of poles does not change the trip setting of a breaker. <<>> For an American residential application, 20 amps x 120 volts = 2400 watts. A good electrical design…

### How many watts will a 12 gauge cord handle?

Assuming that the extension cord is plugged into a normal household receptacle rated at 15 amps the cord will handle 15A x 120V = 1800 watts. If the cord is of any length, at that wattage, you will feel the cord start to get warm like a heating cable. Read more: http://wiki.answers.com/Q/How_many_watts_will_a_14_gauge_extension_cord_handle#ixzz1sD23Tunw

### Should you use a 20 or 15 amp breaker?

Breaker size is dependent on the wire size used for the electrical circuit, for example a 15 amp breaker would protect a 14awg circuit and trip when a load of approximately 1800 watts is exceeded. A 20 amp breaker would protect a 12awg circuit and trip when the load exceeds approximately 2400 watts. These examples assume a voltage of 120vac.

### How many watts does it take to run a heat mat?

I don't know what exactly you mean by a "heat mat", but your question is kind of backwards. You don't run an electrical device *with* watts. You run them to *produce* watts (watts of light, watts of heat, watts of sound, etc). I believe the thing you are really asking is how many amps are required to run your device. As an example, consider a "1500 Watt heater" that is made to be plugged into…

### Can you run a 1000 watts light bulb with a 20 amp breaker 120v?

Yes, considering you can do that on 15 amp breaker easy. Experience in construction field. The worst that will happen is that the breaker will trip off after a few minutes. <<>> In the formula W = A x V. W = 20 x 120 = 2400 watts. If you want you can operate two 1000 watt lamps from a 20 amp breaker operating on 120 volts.

### Do you split wattage on 2 pole breaker?

If the load is rated 220 or 230 or 240 volts (all the same thing), and specifies a wattage rating, that wattage rating is at the double pole voltage. You wouldn't make any adjustments to it. The load should also indicate the input current in Amps, which is used for sizing your breaker. If not, watts=amps x volts, so amps=watts/volts. For example, a 3800 Watt heater at 240v would require 15.83 amps. The breaker for…

### Why will too many electric devices operating at one time often blow a fuse or trip a circuit breaker?

In a house, usually all the outlets in a room are on one breaker or fuse. Each thing plugged into those outlets consumes some electrical power. This is a number rated in Watts. In this case, the more Watts something consumes, the higher the current is (measured in Amps) in the wires that connect the outlets to the main power in the breaker box. The current in power circuit must be limited for safety reasons…

### How many baseboard heaters can you put on a 2 pole 15 amp breaker?

Usually only one heater can be operated on a 15 amp branch circuit. <<>> In North America the total wattage from a two pole 15 amp breaker is Watts = Amps x Volts = 15 x 240 = 3600 watts. Baseboard heaters are considered a continuous load so the circuit can only be loaded to 80% capacity. 3600 x 80% = 2880 watts. So to answer the question, up to 2880 watts can be loaded…