
Leviton Manufacturing Co., Inc. 16
3.1.7 Installing the Sense Voltage and Control Voltage Cables in Wye and Delta
Services
The sense voltage (A, B, C, N) provides phase voltages for metering. The
configuration depends on the type of service being metered:
oSee “For a single-phase panel with the 120V variant of the meter:”
oSee “For a 120/208V three-phase wye panel with the 120V variant of the meter:”
oSee “For a 240/416V three-phase wye panel with the 230/240V variant of the
meter.”
oSee “For a 277/480V three-phase wye panel with the 120V variant of the meter.”
oSee “For a 347/600V or higher three-phase wye panel with potential transformers
with the 120V variant of the meter.”
oSee “For a three-phase Delta panel with the 120V variant of the meter.”
The Series 8000 meters are shipped from the factory with a control voltage jumper
that can be used to connect the control voltage input and the sense voltage inputs to
provide control voltage to the unit. The following procedures explain how to connect
the sense voltage inputs for each of the service types.
For a single-phase panel, use a 3-wire (red, black, white), 14 AWG (1.63 mm2),
90°C (194°F) cable. For a three-phase panel, use a 4-wire (red, black, blue, white),
14 AWG (1.63 mm2), 90°C (194°F) cable. For a Delta service, use a 3-wire (red,
black, blue), 14 AWG (1.63 mm2), 90°C (194°F) cable. Metallic, flexible armored
cable (BX cable) is recommended for commercial installations as shown in Figure 6
on page 14.
The Series 8000 meters must be connected to the sense voltage and control voltage
through a properly rated disconnect that disconnects all line and neutral wires, so it
can be powered down. The disconnect must be located within easy reach of the meter
operator, and must be labeled as such. Opening the disconnect or breaker is the
disconnect device. For multiple Series 8000 meter installations, the same disconnect
can be used to power all meters, and must be labeled for all meters it supplies power
to. The disconnect device must meet IEC 60947-1, IEC 60947-3 and/or comply with
the local electrical code.
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