120/240 Volt Pass-Through kWh Meter, 3-wire (2 hots, 1 neutral), 100A, 60Hz, EKM-25IDS

EKM-25IDS - 120/240V 3-Wire Single Phase kWh Meter

120/240 Volt Pass-Through kWh Meter, 3-wire (2 hots, 1 neutral), 100A, 60Hz, EKM-25IDS


Qty Price
1 - 9 $90.00
10 - 19 $84.15
20 - 49 $75.15
50 - 99 $66.15
100 - + $57.15
Basic 120/240 volt, 3-wire, 100A, 60Hz, kWh meter. Read locally on the LCD display or via pulse output.

Voltage: 120/240 volts 3-Wire

Amperage: up to 100 amps

Type: Pass-Through, Single-Phase, 60Hz

Data: Pulse Output - 800 pulses per kWh

Model: EKM-25IDS

This is a very popular product if you are metering your North American household power and you want a simple read off the face kWh meter.

State-of-the-art, fully solid-state kWh meter with 800 pulse per kWh pulse output

1% accuracy, LCD readout in hundredths of a kWh, to 99999.99 kWh. No conversion factor or multiplier. Basic Meter 120/240V 3-wire, 100A version, Neutral bypasses the meter

Compact, very easy to install design. Simple DIN-rail mounting. Wires pass through 3/8+" diameter tubes in the meter body --Will accept most #3 AWG wire and smaller wire. The only electrical connection is made by 2 small screws which penetrate the wire insulation. The voltage taps pick up power for the meter itself and the voltage reference for accurate metering. This meter draws less than 1 watt while in operation.

Non-resettable LCD display. Usage data is maintained through power outages for up to 10 years.

Single-phase energy meter, 100A 120/240-volt, 3-wire, 60Hz

Standard North American household current. Most commonly a white neutral, a black hot and a red hot wire, 200V to 252V between the hots, 110V to 126V either hot to neutral. This meter will not work on a 120 volt 2 wire system, for this you will need our EKM-15IDS or EKM-15E meter.

For more information about our products and services, we encourage you to visit our online Knowledge Base, which provides spec sheets, videos, tutorials, FAQs, diagrams, and more.

EKM-25IDS Spec Sheet: EKM-25IDS Spec Sheet


Ask a Question
  • Is there a way to take the data and send it to an excel file?

    There is no way to read an EKM 25IDS directly with a computer.  To do this I would recommend any of our models of EKM Omnimeter coupled to either the EKM Push system (this is the best in many ways) or a computer with a USB Converter reading the Omnimeter using the EKM Dash software.  Once the Omnimeter data is on your computer you can make csv files of your meter data and you can view these files in Excel.  Or with the EKM Push system it is easy to produce either a real-time csv file or a historical summary data csv file from the Open API directly that can also be viewed in Excel.

  • Can this meter tell me how many AMPS are being drawn at any particular time?

    The EKM-25IDS will only show the Total kWh measured since the meter was installed.  It will not tell you the real-time amps.  If you would like to get an amp reading on each line I would recommend any of our models of EKM Omnimeters:  https://www.ekmmetering.com/ekm-metering-products/electric-meters-kwh-meters/smart-meters-read-meter-remotely-automatically.html

  • Jameson, Thanks for your response on outdoor install and UV. Your shrink tube is a good suggestion. Will the indoor enclosure kit physically fit inside the outdoor kit? If so it looks like all wire could be concealed in conduit.

    Though I have never installed an indoor enclosure in an outdoor Large UL enclosure, it will physically fit.  How you route the conduit out of the UL enclosure will be a bit tricky.

  • If I used this meter in one of your enclosures to mount outdoors, how do I protect the wires that pass through the meter from UV? It appears that all enclosures have a see through door.

    I would not mount the clear enclosures so that they are in the direct sun.  This will help the components inside the enclosure to last longer by keeping them cooler and away from UV light.  You could put the wires inside the enclosure in shrink tubing if you are still worried about UV damage to the wires.

  • what size wire will the unit hold, largest wire size?

    The tubes in this meter that the wire you are metering must pass through are 3/8" in diameter.   6AWG wire and smaller is safe (though some 4AWG wire will fit if it has thin insulation)  Best is to measure your wire diameter.  If the wire is too tight or will not fit, you will have to go to an EKM Omnimeter with external CTs.  We have CTs that will fit all larger wires sizes (up to 7.0" in diameter).  Here is a wire size chart:  http://documents.ekmmetering.com/34LABEL_WIRE_INFO.pdf

  • If the load has an unbalanced current draw between phases will this meter still total the kWhs to match the utility meter?

    Yes, the EKM 25IDS will accurately meter unbalanced loads.  This meter has 2 internal CTs which measure each hot wire independently.  This meter would work on an unbalanced load such as a 120 volt toaster on phase A and a 120 volt printer on phase B. Or a balanced electric oven that is 240 volts on both phase A and phase B.

  • Are your meters UL listed?

    We have 2 UL Listed Electric Meter models: the Omnimeter II v.3 UL and the Omnimeter Pulse v.4 UL.  The EKM 25IDS is not UL Listed.  Here is a link to the Omnimeter II v.3 UL:  https://www.ekmmetering.com/ekm-omnimeter-ii-ul-v-3-universal-smart-meter-single-phase-or-3-phase-120-to-240v-50-60hz-up-to-5000-amps.html  Here is a link to the Omnimeter Pulse v.4 UL:  https://www.ekmmetering.com/ekm-omnimeter-pulse-ul-v4-pulse-counting-relay-controlling-universal-smart-kwh-meter.html

  • Is there an up and down to the meter? In other words, will the meter read properly if the current is running from top to bottom or from bottom to top?

    The EKM 25IDS is marked with arrows indicating the direction of current.  But it really does not matter which direction you put power through the EKM 25IDS.  As long as you pass the current from both hot wires through the meter in the same direction, the EKM 25IDS will be accurate.

  • can the meter be re-set after each use?

    Our meters are not resettable by design even through a power cycle (to prevent tampering).  Only our Omnimeter Pulse v.4 and Omnimeter Pulse v.4 UL have a separate Resettable kWh register.  If you want to use this meter to know how many kWh were measured from one time to another time, you would have to take the first kWh reading and subtract it from the second kWh reading.  For example if your meter reads 1000 kWh at the beginning of the month, and 1200 kWh at the end of the month, you have metered 200 kWh in that month.

  • Will this work to monitor 2 120v circuits connected to two different phases(breakers) of a 120/208v 3 phase service.

    Yes, the EKM 25IDS will work on a 120/208 system (208 volts between the hot wires with a neutral available).  Please make sure that the wires you want to meter are less than 3/8" in diameter.   If the wires are bigger than this, or if the wires are difficult to access, I would recommend one of our EKM Omnimeters instead.

  • I want to meter a single breaker in my panel that powers our water pump. We have a shared well with a neighbor so I want to figure out the energy used so I can calculate the cost. Is this possible with this meter?

    Yes, absolutely.  Provided your electrical system is a 120/240 volt 3-wire system (2 hots with 240 volts between them and a neutral wire) then this meter would work for you.  Also make sure you have good access to the wires you will be metering and that the wires are under 3/8" in diameter.  If either of these factors is not true, I would look at our EKM Omnimeter for your needs.

  • Dose the meter have build in CT or I have to purchase my CT

    The EKM 25IDS and EKM 15IDS both come with internal Current Transformers (CTs) built in.  When you pass the wires to be metered through the tubes in the body of the meter, this also passes the wires through the internal CTs.  Only our EKM Omnimeters and EKM 15E have external CTs.

  • can this meter be installed without passing the tail end of the wires through it. In other words will I have to disconnect my existing sub panel wires to install or can it simply clip around the wires? Thank you

    In order to install the EKM 25IDS, you have to pass the wires you want to meter through the body of the meter.  Yes, you would have to disconnect your wires, then pass them through the 3/8" diameter tubes in the body of the meter, then connect them back up. 

    If you cannot disconnect your wires, you can use our EKM Omnimeter with split core current transformers instead, which will simply clip over the wires when they are still in place:  https://www.ekmmetering.com/ekm-metering-products/current-transformers-cts/split-core-current-transformers-cts.html

  • Will this meter work on a 50Hz system?

    The EKM 25IDS is not designed for 50 Hz electrical systems, it is only designed for North American 60 Hz systems.  For a 50 Hz meter I would recommend one of our Omnimeter models as they can handle both 50 Hz and 60 Hz.  You can find the Omnimeters here:  https://www.ekmmetering.com/ekm-metering-products/electric-meters-kwh-meters/smart-meters-read-meter-remotely-automatically.html

  • I wanted to confirm the unit handles 100A per leg and not 100A total.

    The EKM 25IDS can handle 50 amps per phase or 100 amps total.  It has 2 internal 50amp Current Transformers which are used to measure the current on each leg of a 120/240 volt 3-wire (2 hots and 1 neutral) system.  If you want to meter higher amperages, I would use one of our EKM Omnimter models.

  • can I read multiple breakers with the same meter, looking to monitor a sub panel and a heating system in the same house (also a water meter).

    I would not use our EKM 25IDs or EKM 15IDS for metering multiple circuits.  I would use one of our Omnimeter models for this, because they use external CTs.  If you use an EKM Omnimeter you can pass multiple wires through a single Current Transformer.  As long as you only pass wires from the same phase through each CT, this will work. If you put 2 wires through the same CT that are on different phases, they will cancel each other out.

  • What calculation do I use to determine number of kilowatts used?

    You can use this meter to determine how many kilowatt hours (kWh) have been consumed by reading this value directly on the face of the meter.  You do not have to do any math to the value you read on the face of the meter.   Kilowatt hours (volume of energy) are different than kilowatts (real time power).  Utility customers are billed in terms of kilowatt hours.

  • Regarding the 100 amp max spec, I believe my house has 125 amp service, however, I wish to monitor the KWH use in my hobby shop which is on a 50 amp subpanel. So if I install your meter after the 50 amp breaker is this ok?

    In the case you've described the meter just needs to meet or exceed the 50A rating. The breaker will flip well before the amperage could exceed 100A. So this meter should work well for metering your hobby shop subpanel.

  • What happens when the meter reaches 99999.99 kWh? Does it just stop working, or does it reset to zero and keep going again?

    If the meter records more than 99999.99 kWh, which is the maximum that will display on the LCD screen, it will roll back to 0 and continue metering like a new meter. So yes, the meter will continue to work without any problem.

  • Do you have a meter that can easily monitor my whole house usage so I can compare that to the utility co. readings?

    Yes, it is possible that this meter model could be used for this purpose. Your wires will need to be 3/8" in diameter or less in order to pass through the body of this meter. You could also use our Omnimeter I v.3 model and 2x external current transformers to meter your whole house. You would be able to use the kWh reading to compare with your utility meter's readings.

  • Hi, could this be attached to a master meter for two houses to measure separate houses electric usage?

    Yes, this meter can be installed to submeter the kWh usage of a house. This meter is often installed "behind" the utility meter in order to divide the usage by rental property. It is most commonly used for the use case that you have described. It provides a kWh readout so that the load the meter is installed on is easily readable.

  • Where does the ground wire go? I understand the 2 hot, 1 neutral.

    There is no need for a ground or neutral connection to this meter. You only need to pass the two hot wires through the body of the meter and tighten down the two piercing screws.

  • I have 4 wires going into my panel. 2 hot, 1 neutral, 1 ground. Do you have a device that works for 4 wires?

    The meter (the 25IDS) will work with your electrical system. You do not need to connect the ground or neutral wires. You only need to pass the two hot wires through the body of the meter and tighten down the piercing screws.

  • Can I use this meter to measure a total power consumption of 2 circuit breakers each 20A/110V - Total power of (Circuit-1 + Circuit-2) instead of individual? Purpose: I wanted to measure a total power usage of my tenant who has two (2) 110V circuit breakers wired to that unit.

    This meter is designed to meter both phases of a 120/240V electric system. So you could potentially use it to monitor both circuit breakers but the circuit breakers must be on different phases. 

    If the circuit breakers are on the same phase then you could use an EKM-15E meter and pass both wires through the CT. With the correct voltage reference this setup would give you an aggregated kWh reading for both of the circuit breakers.

  • Can this unit be hooked up to the web based push unit? If not what is the most basic unit that is compatible?

    No, this meter model is not supported by the EKM Push system. Only our Omnimeter Models will work with the Push system, and our Omnimeter I v.3 is the most basic Omnimeter version that we offer. It will definitely work on any 120/240v electrical system.

  • Can I use this meter to measure power usage from 2 circuit breakers each 20A/110V?

    This is not the right meter for what you've described. If you want to separately meter two individual 110v circuits then I would use two of our EKM-15E meters, or two of our EKM-15IDS meters.

  • The outside diameter of my wire is 7/16, 1phase, 240volt. Which meter would work for this application?

    Because your wires are larger the 3/8" in diameter, which is the largest diameter that the EKM-25IDS can handle, I recommend using our Omnimeter I v.3 and two of our smallest 200A Current Transformers (CTs). The combination of the Omnimeter and CTs should work well for your application.

  • Connected meter but does not come on! Passed thru two number 8 copper wires, one on L1 the other L2. L1 is hot, L2 is not powered on. L2 was ran for future in case I wanted to add an additional circuit. Both Tap screws show 120v power. L2 has no power connected to it. EKM Meter has no reading. Blank. Neutral and ground connected directly to box as before. Problem? Very simple install. re:251ds Thanks

    For this meter to function L2 needs to have voltage. There doesn't need to be any current on that line but it needs voltage for that phase. In other words, there needs to be 240v line-to-line for the meter to function. If you're only using 120v 2-wire (1 hot, 1 neutral) then our EKM-15IDS or EKM-15E might be better suited for your needs.

  • For the 800 pulse-per-kWh: What type of pulse (amplitude, offset, and duty cycle) is generated by this meter?

    The Pulse Output of all of our meters (including the 25IDS) is an un-powered "dry contact" closure (though solid state).  Electrically the Pulse Output is very similar to the closing of a dry contact switch.  The only difference is that in this case the output is polarized (only passes current in one direction).

    Pulse Output Specs:  
    Impulse width: 90ms
    Compatible voltage: up to 27V
    Current: ≤ 27mA
    Max. lead length: 200ft  

  • Does this meter have a horsepower rating? Is it OK for use on a UG well pump motor?

    This meter does not have a horsepower rating but it might be ok to use on a well pump, provided that the motor is powered by 120/240VAC (not DC) single phase, 3-wire (2 hots, 1 neutral), up to 100A.

  • Can I hook this up with No. 4 wire?

    This meter will accept wires up to 3/8" in diameter (0.375). 4 AWG wire is typically (0.37), so in theory you should be ok with this gauge but wires of a given gauge can differ in diameter, as the insulation thickness can vary. So the best practice is to measure the wire if you can, to determine the true diameter.

  • We are putting in a basement apartment. Is this something we could have installed on the line going to their Circuit Board. If not is there something like this that can?

    This meter is designed for use on most single phase 120/240V 3-wire (2 hot, 1 neutral) electrical systems, which is the most common residential system in the U.S. So if this is the type of electrical system in the basement, and your hot wires are 3/8" in diameter or less, then this meter may work well for your needs. If the system is only 120v 2-wire (1 hot, 1 neutral) then you will want to use the EKM-15IDS instead.

  • I'm looking for a 200-240V alternative to a Kill-A-Watt monitor for computer servers. Will this meter instant read or is it cumulative?

    This meter only provides a cumulative kWh value. If you want a meter that provides instantaneous watts and other values you would need to use one of our Omnimeter models. I recommend that you take a look at our Omnimeter I v.3. This meter requires one or more external Current Transformers in order to operate (it sounds like two in your case).

  • Can this device track monthly usage with an internal clock?

    This meter does not have an internal clock to calculate monthly kWh. It simply keeps a running total of all kWh ever metered, so you would need to track monthly usage manually. Our Omnimeter line of kWh meters do have an internal clock that can be set, used to set Time Of Use periods, and allow for the meter data to be logged with a computer. The easiest way to do that, provided that you have an internet connection available, is with our EKM Push system.

  • Does this work with 240V systems with no neutral (L1, L2, Ground)?

    Yes, this meter does not need a connection to neutral or ground.

  • After a power outage in the city, my tenant noticed the red light blinks now. I honestly don't know if it blinked before the outage? Is this common or does it mean something else?

    The blinking red light is an indicator that the meter is registering kWh usage. It blinks 800 times per kWh. If the light is blinking then your meter is in good shape. All of our meters should have no problem with power outages; kWh data is retained in the meter for up to 10 years if unpowered.

  • I want to monitor a 30 amp 240v AND a 20 amp 120v circuit at the same time. If I pass line wires from same phase thru line 1 and other line wire thru line 2 and commons thru the 3rd, will this cumulatively total usage?

    It is possible to pass multiple wires through the same tube on the meter, provided that they are on the same phase, that collectively their diameter is 3/8" or less, and that voltage tap screw can successfully pierce the insulation of one of the wires and get the voltage reference for the phase. There are only two tubes on this meter, one for each hot leg of the 120/240v system, there is no connection for neutral.

  • Can this meter be supplied from a 30A/240v (2-pole) breaker wired to a 120v RV Outlet (TT-30) where L2 is capped w/wire nut? I wish to wire now in order to allow for future 240v EV (14-30) outlet.

    I'm not entirely sure I understand your question. This meter is designed for 120/240v systems, with both hot legs passing through the body of the meter. The meter needs to be able to sample the voltage from both legs, even if you're only using one. As long as the meter is installed in this configuration it is ok if the load is 120v and only uses one of the legs. If installed correctly it will also allow you to use the second leg in the future for your 240v EV outlet.

  • How much should installation cost? Parts and labor?

    All we can comment on with complete certainty is the cost of the products we offer. Our metering systems vary in cost depending on the scope of the requirements and the capabilities needed. All of our pricing is available in our online store. The cost of installation will vary widely depending on if you do the install yourself, find a local handyman, or hire a licensed contractor. These options are your decision so we won't be able to comment with any authority.

  • I want a meter that can accurately measure usage by a device with a poor power factor of 0.64. A kill-a-watt does not work well. Could this give me kVA hours, or otherwise compensate for non-unity PF?

    All of our electric meters take power factor into account for accurate metering. Our Omnimeter Pulse v.4 provides VARs on each line and total, and Total kVARh.

  • Will this meter work for 1 phase 277v 1 hot & 1 neutral?

    This meter will not work for the system that you mention. For this type of system you would need to use one of our Omnimeter models (any would work) paired with one appropriately sized Current Transformer for the one hot wire.

  • Will this work on 100amp 220volt mobile home wire 2/2/2/4 that is aluminum?

    Because the thickness of insulation can vary from one wire manufacturer to another, we tend to refer to wire diameter instead of wire gauge, as this is really what matters. The wire diameters must be less than 3/8" in order to pass through the holes in the meter. So if your system is single phase 120/240 (two hot wires, one neutral), and your two hot wires will fit through the meter, then this meter will work well for your needs.

  • What is the use of the pulse connection, + – ?

    The meter generates pulses that indicate kWh usage. It pulses 800 times per kWh. The pulses can be counted by another device by connecting the + and – terminals on the 25IDS meter to the appropriate terminals on the pulse counting device. This is a 2 wire connection and is commonly done using a twisted pair of wires found inside of CAT5 cable. 

    We have a couple of pulse counting options: 1.) Our 8 Digit Pulse Counter allows you to mount a digital display where you want it.  This is a nice option if your meter is not easily accessible.

    2.) Our EKM Omnimeter Pulse v.4 will count pulses on up to three separate inputs. It also has the ability to be read remotely with a computer, either locally or over the internet with our EKM Push system.

  • I'm looking for a monitoring meter to use on our RV as we travel about to confirm our billing usage, is the Basic kWh Meter 100A 120/240-volt, 3-wire, 60Hz EKM-25IDS appropriate, any recommendations?

    It's hard for me to make an informed recommendation because I don't know enough about the electrical system in your RV. I do know that many RVs do have 240V circuits but I don't think that they all do. If you feel like the electrical system in you RV is 120/240V (2 hot wires, 1 neutral) then this meter could work well. The 2 hot wires that pass through the meter need to be 3/8" diameter or less in order to fit. If you decide to try it, I would definitely install the meter in an Enclosure to protect it while you are under way.


    Yes, it will definitely work if your electrical system is: 120/208V, single phase, 3-wire (2 hot, 1 neutral), up to 100A.

  • I have a large building and part of it is a welding shop. I need to monitor the power use of 3 welders plus a large metal brake. Will this meter be sufficient?

    This meter is designed to work with single-phase, 3-wire (2 hots, 1 neutral) 120/240V electrical systems up to 100A. The two hot wires pass through the body of the meter itself. So if this sounds like it will work with your equipment then you should be good. If you have doubts that it will work, or if you want a remote readable solution, I suggest that you take a look at our Omnimeter I v.3 instead. This meter is design to work on a wide range of electrical systems when paired with the appropriate number of Current Transformers.

  • Even if this guy is connected to monitor 240V, if I have a load from 1 line to neutral, will this meter still count the power draw?

    If I understand your question then yes, this meter will work fine. So if you have line 1 and line 2 passed through the meter, then it infers a line 1 to neutral voltage by halving the line to line voltage. This make for a ~1% accurate metering system. If higher accuracy is important then I recommend using an Omnimeter I v.3 and 2x Current Transformers, which makes for a ~0.5% accurate metering system.

  • Would this meter detect the reverse flow of power, which may occur when my grid tie solar system is generating more electricity than I am consuming?

    This is not the meter that you will want to use to monitor a solar system. I suggest that you take a look at our Omnimeter line of kWh meters. These meters provide you with Total kWh (forward + reverse) as well as Reverse kWh. In other words, you can tell how much power is going in either direction (to or from the grid). 

    Additionally, the Omnimeter Pulse v.4 also provide a real time direction of current. So you can know in real time if you are generating more that you are consuming, when installed as a net meter.

    There is more information regarding solar metering here: Solar Metering.

  • Will this read the actual watts being used, at the time, not just kwh's?

    This meter only displays kWh, so there is no way to determine from the LCD screen what the watts are in real time. However, internally it is essentially calculating watts in order to calculate kWh. For example, if the meter is reading a constant load of 1000 watts for an hour, that equates to 1.0 kWh.

    If you would like to know the watts in real time then I suggest you take a look at our Omnimeter line of kWh meters. These meter provides a number of additional data points, including watts. They can also be read remotely with a computer or mobile device if you wish.

  • The 240v feed that I want to monitor using this device is 10ft from where I want to mount the meter. Is there a way of installing this device with exterior CTs and jumper wires like on your smart devices?

    For this meter the feed itself would need to be re-routed to where you want to mount the meter. This is because both hot lines of your 120/240V system would need to pass through the body of the meter itself. The current transformers are inside the meter so there is no way of using this meter with external CTs.

    It sounds like one of our Omnimeter models with two Current Transformers might work better for your needs. However, keep in mind the the CT leads are six feet in length so they would need to be extended in your case. Extending CT leads decreases accuracy by 1% for every 50 feet, so that should be taken into consideration before you decide.

  • Will it work with 220V circuit? I'm living in Vietnam and have only 1 hot and 1 neutral. If it possible how I could connect to this meter?

    Yes, the EKM-25IDS will work fine on a single phase, 2 wire (1 hot and 1 neutral), 220V system. In this case you would pass both wires through the body of the meter and tighten down both piercing screws. Thats all that is required for you to meter your 220V circuit.

  • Does this model have a users manual?

    All of our meters have Spec Sheets that explain installation and usage.

    Use this link to download the EKM-25IDS Spec Sheet.

  • How would this meter be mounted on an indoor wall other than by purchasing the Indoor Enclosure Kit?

    This meter mounts on DIN rail. This is either done in an enclosure, which we recommend, or it could be on a wall, embedded in another device, etc.

    We offer small pieces of DIN Rail for mounting, separate from the enclosures that we offer. As I mentioned before, we strongly recommend that our meters be installed in some type of electrical enclosure; either an existing electrical panel, an enclosure that we offer, or one sourced from another supplier.

  • Will this work in a 208V circuit from a 3 phase source. Assuming I attach the 2 hots being used for the 208V circuit and 1 neutral? Also, if it works how many amps can it run on a 208V circuit.

    Yes, this should work fine, provided that the diameter of the hot wires is 3/8" diameter or less. The two hot wires of the 208v circuit will pass through the body of the meter. Your neutral will not be needed.

  • Can this be reset to Zero?

    No, none of our kWh meters are resettable (with one caveat). This is to prevent tampering when the meters are being used as revenue grade submeters for billing allocation. The kWh values will always increment upwards and the meters will even retain the kWh reading if the meter looses power, for up to ten years. The caveat mention before is the the v.4 Omnimeters have secondary Total kWh and Reverse kWh values that are resettable, in addition to Total kWh and Reverse kWh values that are not.

  • Is there an enclosure for this meter with a with a window or hinged cover?

    Any of the EKM Enclosures will work well with this meter. Two of the enclosures  are watertight and have transparent covers. One enclosure also has a hinged and latching cover.

  • Are there any CTs involved with this meter?

    Yes. The Current Transformers (CTs) are inside the meter itself. The two hot wires of a 120/240 volt electrical system pass through the body of the meter and through the two CTs within the meter. Once the wires are through the meter there are two piercing screws that are tightened, which penetrate the wires' insulation. This gives the meter power and provides a voltage reference. The voltage reference, along with the current reference from the CTs, allows for very accurate metering.

  • How do you read it as it has many different readouts? for example L1,L1, then 1 2 etc. Not sure which one is actually kwh

    This particular meter only has one readout, which is kWh for a 120/240v electrical system (two hot lines and one neutral).

    The Omnimeter v.3 models displays 15 different values on the the LCD screen and the Omnimeter v.4 displays 42 different values. You can see those values here.

  • Will this work on 120 volt circuits?

    If the 120 volt circuit in question has two wires (one hot and one neutral) then this is not the meter to use; it is intended for 120/240v systems (two hots and one neutral). 

    The pass-through meter you would use for a 120v system is here.

    This is another option for a basic 120v meter

    If you're interested in a meter that you can read remotely on your computer then check out this 120v Package.

  • I want to monitor usage of power to houseboat in marina. I have two 30 amp power cords that run from marina plug in to houseboat plug in. What would be involved to install ?

    If both your 30A plugs consist of 120V each, AND if both are from opposite phases (that means you have 240V between the two) then the EKM-25IDS may work for your needs. You would need to run just the two individual hot wires through the meter (both in through one side and both out the other side - in through the bottom and out through the top, for instance) and they would then continue on to feed your houseboat. For more details contact us here: https://www.ekmmetering.com/pages/contact-us

  • Can I use this as a meter read in my barn that has its own electric panel

    Yes, this meter can be used on any panel or load provided that the panel or load is 120/240V single-phase 3-wire (2 hot, 1 neutral), and 100A or less. We do recommend that the meter be installed in an enclosure of some kind. Any of These Enclosures will work with this meter model.

  • Can other wires pass next to or behind this unit without affecting its metering quality? How much space do I need away from the unit two other wires not being metered?

    Thanks for your inquiry. Other wires can pass by this meter and should not affect its metering quality or readings. This is actually a common installation situation for this meter and should not cause any problems. 

  • I am looking for an outdoor sub meter that will allow me to monitor the electric usage for a 220 RV plug in line. Being that I have a relative plugging into this circuit off of my meter, I want to be able to monitor their electric usage so they can pay that amount of kilowatts towards the electric bill. To complicate things further, I have an energy savings plan from 12 noon until 7 PM Monday through Friday with peak rates so is this the best electric sub meter that you would have that would be able to be used outdoors for a 220 RV plug-in, monitor two different rate periods of kilowatts?

    The 25IDS meter will not do what you want, as it does not allow you to set a Time Of Use(TOU) for multiple rates. 

    I recommend that you take a look at our Omnimeter I v.3. This meter allows you to set up to four TOU periods, so you can determine how many kWh you are using during the peak rate period vs. off peak period.

    To set the TOU periods in this meter you will need to read the meter with a computer using our USB Converter and EKM Dash software. The Dash software will let you change settings in your meter.

    Once you have made the correct setting in the meter, then you can use the EKM Push system to read your meter remotely if you wish.

    If your electrical system is single phase 120/240V system (2 hots, 1 neutral) then you will need to use two Current Transformers with this meter.