WARNING! To extend the CT leads, the electrician must use appropriately rated, 0.75
mm
2
to 2.5 mm
2
, twisted pair wire and install it
in accordance with all applicable electrical
codes.
The electrician may add as much as three ohms round trip resistance to the CT or up to 1.5 ohms per
wire. For reference, the following maximum lengths at 75° C by gauge are:
•
64 meters of 0.75 mm
2
7-strand Cu = 1.5 ohms
•
85 meters of 1 mm
2
7-strand Cu = 1.5 ohms
•
128 meters of 1.5 mm
2
7-strand Cu = 1.5 ohms
•
213 meters of 2.5 mm
2
7-strand Cu = 1.5 ohms
Resistance figures may not be appropriate for all geographies or installation conditions. A qualified
electrician must determine the wire gauge and type to obtain a maximum round trip resistance of
three ohms.
Select wire that is code type and rated for voltage and temperature for the specific application.
Mechanically protect the wires in a code type conduit or raceway. Use certified connectors for splices
and insulate splices from one another and from the raceway, conduit, or junction box, if metallic.
Buried wires must be certified for direct burial and follow the code for installation. Do not bury splices
unless in a certified junction box rated for the application and use a certified moisture resistant
connection method.
4. If Required, Install DRM Support and a Central
The multiphase IQ Gateway Metered supports DRM (Demand Response Management). If required
for
your region, an electrician can install DRM support and add a central disconnect. The IQ Gateway
(ENV-S- WM-230) has a pre-installed 15kΩ resistor that provides DRED bypass when DRED is not
required.
NOTE
: In systems where a central disconnect (contactor) is installed, you must use
Installer App to configure the meters as described in Step 8 before device discovery can
complete.
To configure DRM support use the terminals shown:
DRM
port
label
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