EKM-25EDS-N v.2 meters have CT connections as pictured in the photo above--connections 1 and 3 are White Wires and connections 2 and 4 are Black Wires.
Connections L1 and L2 require 240 volts. #14 wire fused with a 15A breaker is recommended. It is recommended that you label the two hot lines Line1 and Line2, and also label the breakers you will be using for powering the meter. Be sure that Breaker1 is on the same leg as Line 1, and Breaker2 is on the same leg as Line 2.
It is important that CT1 be on Line1, and CT2 be on Line2, and that Line1/Breaker1 be connected to L1, (connection 7), and Line2/Breaker2 be connected to L2, (connection 8).
Once powered up and operating, if Register 02 (Reverse kWh) shows increasing kWh, one or both CTs are connected incorrectly.
Notes on installation for all External CT “Smart” meters
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1. CAUTION!! Be sure all power is off when installing the CTs, even the split-core (snap-on) CTs. Electricity flowing in the wires passing through the CTs creates an electrical current in the CT wires that can be dangerous!
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2. Install CTs with the flow of electricity--supply to load--in the direction of the arrow on the CT.
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3. More than one wire can pass through a CT, but only wires from the same “leg” of the 2-leg 240V supply.
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4. Be very careful to snap the split-core CTs fully closed. This takes a hard squeeze on the CT. The 2 halves should come close together, and the 2 small buttons should pop out. A nylon zip-tie for added security is a good precaution against the CT opening inadvertently and effecting the accuracy of the meter.
EKM-23EDS-N v.2 meters have CT connections as pictured in the photo above--connection 1 is the White Wire and connection 2 is the Black Wire. Once powered up and operating, if Register 02 (Reverse kWh) shows increasing kWh, the CT is connected incorrectly.
Connections L and N require 230 volts. #14 wire fused with a 15A breaker is recommended.
