How to determine the power appliance improvised means 3 method

  • Dec 26, 2019
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When a new household appliance you need to know its power. This parameter is important as the wiring in the apartment can not "pull" too powerful consumers. But a special device to measure this value is only a few people, most often associated with the electrician on a professional level. But to determine the power of the appliance and can be improvised means.

1. Multimeter and a simple calculation

Entirely without instruments found power technology will not work. It needs the most simple, inexpensive multimeter, but only with the current measurement mode.

Figure 1: Standard and inexpensive multimeter
Figure 1: Standard and inexpensive multimeter

To determine the capacity of the appliance with a multimeter, do the following:

  1. Include on the multimeter mode "measurement of AC power."
  2. One probe is connected to the plug of the appliance, the second - to insert into a power outlet.
  3. Carry out a wire from the second contact plug to the socket.
  4. Including appliances and measure the current.

After the current strength is measured, it is necessary to substitute the value in the simple formula: P = U * I

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Where P - power, U - voltage network, and I - current, which was found by a multimeter. Obviously it is known that the mains voltage is 220 V, can only multiply the potential difference on current. This will be the power of the appliance, which is measured in watts.

It should also be clarified that the tolerance measuring amperage virtually all multimeters is not more than 10 A. For convenience and measure large quantities you should use clamp meter, the value of which does not exceed the cost of a conventional multimeter. Who sold the combined models, including the meter and clamp simultaneously.

Figure 2: Current clamp
Figure 2: Current clamp

2. How do I find the power using electricity meter?

Many owners of apartments and houses forgetting that electric meter - is not only accounting unit, but as accurate measuring device, which helps to quickly identify the power of any appliance.

Figure 3: Modern electric power meter
Figure 3: Modern electric power meter

power installation sequence using standard Electric:

  1. Disable all consumers in the apartment. Even the smallest light display on your TV will be the cause of high uncertainty, so it is best to turn off all appliances in the apartment.
  2. Include only the appliance with the power of which will be read to the network. The time required to measure - no more than 15 minutes.
  3. Detect how many times morgnot lamp on the electric counter. Usually near a lamp must be marked "A".
  4. The front panel of the meter to find the following option: imp / kW * h.
  5. The number of blinks bulbs should be divided by imp / kW * h. The resulting figure and will power the electric instrument.

All it would take 15 minutes of free time, and thus no measuring instruments, except household electricity meters are not required.

3. Simple advice: to look into the appliance passport

In order not to invent the wheel, you can always look into the passport on the appliance.

Any manufacturer of household appliances is obliged to provide the following information on the product in the technical documentation:

  • Nominal voltage rating and home network required for the proper and long-term functioning of the device.
  • mains frequency.
  • Power device.
  • Power consumption for various modes of operation.
  • Weight.
  • Warranty period.

Unfortunately, often manual, together with a passport to leave the product in the bin almost immediately after buying new items. And then, to see the power of the appliance, should be used 2 ways described above.