930-110-01-B.00 PowerLogic
TM
EM4800 Series
04/2011 Installation
© 201
Schneider Electric All Rights Reserved
13
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:
• see “For a single-phase panel with the 120V variant of the meter:” on
page 15
• see “For a 208Y/120V three-phase wye panel with the 120V variant of
the meter:” on page 16
• see “For a 416Y/240V (or 380Y/220V) three-phase wye panel with the
230/240V variant of the meter:” on page 17
• see “For a 480Y/277V three-phase wye panel with the 120V variant of
the meter:” on page 18
• see “For a 600Y/347V or higher three-phase wye panel with potential
transformers with the 120V variant of the meter:” on page 19
• see “For a three-phase Delta panel with the 120V variant of the meter:”
on page 20
The PowerLogic EM4833, EM4880 and EM4805 meters are shipped from
the factory with a control voltage jumper that can be used to 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 mm
2
), 90°C (194°F) cable. For a three-phase panel, use a 4-wire (red,
black, blue, white), 14 AWG (1.63 mm
2
), 90°C (194°F) cable. For a Delta
service, use a 3-wire (red, black, blue), 14 AWG (1.63 mm
2
), 90°C (194°F)
cable. Metallic, flexible armored cable (BX cable) is recommended for
commercial installations as shown in Figure 6 on page 15.
The PowerLogic 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
PowerLogic 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.
