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How To Wire a Single Phase kWh Meter? Installation of 1-Phase Energy Meter.

How To Wire a Single Phase kWh Energy Meter? (3-phase, 4 Wire Energy Meter)

(From the Supply to The Main Distribution Board (MDB)

Below are the the connections diagrams for installation of a Single-Phase (3-phase, 4 Wire)) kWh meter (Digital or Analog Energy Meter) from the supply to the main distribution board in home.

The Red Wire shows the Live or Line or Phase  and the Blake shows the Neutral wire.

These graphics below shows the above idea in a very simple way.

Installation of single phase kWh Meter (3-phase, 4 Wire energy meter)

Click image to enlarge

How To Wire Single Phase kWh meter (3-phase,4 Wire Energy Meter) ?
How To Wire a Single Phase kWh meter? – (3-phase, 4 Wire Energy Meter installation)

Here is another live example of an energy meter which has been installed on the main pole of source supply.

Click image to enlarge


In the above graphics and diagrams,

PIN =  Incoming Phase or Live from the source supply voltage

POUT = Out going Phase or live to the home main distribution board.

NIN =  incoming Neutral from the source supply voltage.

NUOT = Out going Neutral to the home main distribution board.

Warning: This example shows the most common used arrangement in the world, but there are variations as well in some area. The setting may be different in other type of kWh or energy meter in different locations around the world. For safety. Please contact to the supply and service provider to confirm the connection type before installation.

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  1. Anonymous says:

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  2. Thilak raj says:

    thanks for the great info.<br />i need another info like this.<br />i.e i have a single 3 pin plugin socket connector and i have energy meter like as you shown above so how to connect the 3 pin spike buster plug to energy meter to find out energy consumed?

  3. Nabeel Taj says:

    please tel me that the neutral of input and output are common or not in digital energy meter

  4. I read this paragraph fully about the difference of
    most recent and preceding technologies, it’s remarkable article.

  5. Muhammad Hayat says:

    GoodGood knowledge

  6. abdullateef moshood says:

    Good good one

  7. Doulathrao Kadam says:

    what happen when two meters r connected in parallel. Whether the consumption of units of both meters r same or differ.

    1. Dear Sir,
      We have already done the experiment by connecting two parallel wires to two different energy meters, connected (common single load of) halogen lamps of 2 X 1 Kw, capacity each, both the lamps connected parallel, and each input and output connected to 2 X 42.5 Mtr. wire length to each lamp.

      Wire resistance was 1.032 and other 4 wires of 1.63, 1.9, 2.03, 2.33 and 2.37 connected simultaneously against common wire having 1.03 Ohm. each length was 42.5 X 2 mtr length.

      Live source to both the meter, and neutral to 2 nd meter, Neutral made common at mtr end to run both the energy meter.

      Current observed 8.69 Amps = I1 + I2 , 230 V for both lamps at source. It was observed that 2 nd mter reading was moving fast, and the ratio of power consumption observed in the ratio of 1.6/1.032 ohms. Calculated Amps for each lamps 4.35 amp.

      Power consumption in second meter observed fast compared to 1st, even after alter terminations from 2 nd to 1 st meter.

      Result are attached. This is because of high resistance in wire. as per calculation losses is comes approxy.

      KWH ( Power in Hour) = KW ( Speed) X Hours, Hence in less ampacity wire takes more time to consume same enegy, and it is proportional to its resistance ratio.

      We can say if the ampacity of wire does not meet the requirement in high res. wires takes more time and leading to heat the wire also.

      If same wire connected to AC , high res wire takes more time to cool the room compared to low res wire.

      waiting response from expert, energy saving point of view.

      M. No 7718885109.

  8. Venkatesh R Kamat says:

    How to find out meter is running or electricity is consuming in digital meter. Earlier we had mechanical ring rotating that was evident. Now not able to find out.

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