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930-110-01 PowerLogic
TM
E4800 Series
02/2009 Installation
© 2009 Schneider Electric All Rights Reserved
11
Installing the Reference Voltage and Power Cable in a 120V Application
The reference voltage (A, B, C, N) provides phase voltages for metering. The
configuration depends on the type of service being metered:
• single-phase with 1 CT
• single-phase with 2 CTs
• three-phase 3 CTs
The PowerLogic E4833, E4880 and E4805 meters are shipped from the
factory with an AC power block between the control power input and the
reference voltage inputs to provide control power to the unit. The following
procedures explain how to connect the reference 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
) cable. Metallic, flexible armored
cable (BX cable) is recommended for commercial installations as shown in
Figure 6 on page 12.
The PowerLogic E4833, E4880 and E4805 meters must be connected to the
reference voltage and control power through a properly rated voltage
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.
To install the reference voltage wiring in a 208Y/120V or 120/240V
application:
NOTE: If the electrical distribution panel does not designate phase A,
phase B and phase C feeds, make your own designation and use it for
the rest of the installation.
1. Before connecting the reference voltages, ensure the power is OFF to
the circuit being connected.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow
safe electrical work practices. See NFPA 70E.
• This equipment must only be installed and serviced by qualified
electrical personnel.
• Turn off all power supplying this equipment before working on or
inside equipment.
• Always use a properly rated voltage sensing device to confirm
power is off.
• Replace all devices, doors and covers before turning on power to
this equipment.
• The meters must be connected to the reference voltage and control
power through a properly rated disconnect.
Failure to follow these instructions will result in death or serious
injury.