Quadlogic MiniCloset-5c User manual

Table of Contents
Manual
Dimensional Drawing
Residential Installation Diagrams (US)
Residential Installation Diagrams (Canada)

© COPYRIGHT 2009 Quadlogic Controls Corporation
MiniCloset-5c
Installation Manual

© COPYRIGHT 2009 Quadlogic Controls Corporation
Table of Contents
Contact Information................................................................................1
Warning ................................................................................................1
Disclaimer .............................................................................................1
Symbols................................................................................................1
Chapter 1
Introduction
Overview...............................................................................................3
Power Line Communications (PLC) ............................................................3
Scan Transponder-5 (PLC Data Collector and Communicator)........................3
Quadlogic Metering System......................................................................4
Chapter 2
About the MiniCloset-5c
The MiniCloset-5c ...................................................................................6
Specifications.........................................................................................7
Chapter 3
Parts and Options
Parts.....................................................................................................9
Options .................................................................................................9
Chapter 4
Installation
Overview............................................................................................. 13
Installation Cautions and Warning...........................................................13
Protective Conductor Terminal................................................................13
Installation Instructions for Meter, MCI, and CTs .......................................14
Wiring Overview ...................................................................................18
3-Phase, 4-Wire Wye Wiring................................................................... 18
1-Phase, 3-Wire 120/208V Wiring (Network) ............................................25
3-Phase, 3-Wire Delta Wiring ................................................................. 31
3-Phase, 4-Wire 1EL Wiring.................................................................... 37
1-Phase, 3-Wire 240V 1EL Wiring............................................................43
1-Phase, 3-Wire 240V 2EL Wiring............................................................49
Chapter 5
Using the Meter
Display Navigation ................................................................................ 55
Verifying Meter Functionality ..................................................................58
Resetting Demand Values (For Commercial Applications only) .....................60
Chapter 6
Applying Multipliers
Reading the Display .............................................................................. 61
How CT multipliers are calculated............................................................ 62

© COPYRIGHT 2009 Quadlogic Controls Corporation
Chapter 7
Communications
Overview............................................................................................. 63
HyperTerminal Private Edition Setup........................................................63
Security Hierarch.................................................................................. 65
Logging In To the Meter ........................................................................65
Basic Meter Data .................................................................................. 66
Advanced Meter Programming................................................................69
Chapter 8
Troubleshooting
Resolving Meter Issues..........................................................................71
Chapter 9
Repair and Spare Parts
Repair or Replacement .......................................................................... 73
Spare Parts.......................................................................................... 73
Chapter 10
Miscellaneous
Preventive Maintenance.........................................................................75
Warranty Information............................................................................75
Release Dates ......................................................................................75
Revision History ...................................................................................75
Appendix
The Communications Module ..................................................................76
RS-485 Overview.................................................................................. 79
Guidelines for Proper Wiring of a RS-485 Network .....................................79
The Pulse Datalogger Module..................................................................85

© COPYRIGHT 2009 Quadlogic Controls Corporation
1
Thank you for purchasing a MiniCloset-5c multi-channel electric power meter manufactured by
Quadlogic Controls Corporation. Quadlogic has been designing, manufacturing, and selling digital
electric metering systems for over 25 years. We appreciate your business.
CONTACT INFORMATION
For sales and technical support, please contact Quadlogic Controls Corporation as indicated
below.
Quadlogic Controls Corporation
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Homepage: www.quadlogic.com
WARNING
This manual is for persons who have received training and are qualified to work with
electricity and electrical metering equipment. All applicable national and local electrical
codes and standards must be followed. Failure to follow proper procedures may result in
damage to the equipment and/or serious bodily harm including death.
DISCLAIMER
The information in this manual has been compiled with care, however, Quadlogic Controls
Corporation makes no warranty as to the accuracy or completeness of this material.
Furthermore, the product(s) described herein may be changed or enhanced from time to
time. This information does not constitute commitments or representations by Quadlogic
Controls Corporation, and is subject to change without notice.
SYMBOLS
WARNING
NOTE
CAUTION

© COPYRIGHT 2009 Quadlogic Controls Corporation
2

© COPYRIGHT 2009 Quadlogic Controls Corporation
3
CHAPTER 1
INTRODUCTION
OVERVIEW
Quadlogic Controls Corporation manufactures a line of revenue-grade electricity meters and
metering systems that utilize our patented, two-way Power Line Communications
technology. For over 25 years, Quadlogic systems have used this patented technology to
transmit advanced meter data over the existing power lines in a building or service territory.
No additional communication wiring is required to transmit metered data to the Scan
Transponder (Quadlogic’s data collector). Because the system is read remotely via various
public or private communication means, meter readers are also not required. Building and
facility owners, property managers, and utility companies depend on Quadlogic meters to
provide all the data needed to bill customers, allocate energy costs, manage loads, and
make smart energy decisions.
POWER LINE COMMUNICATIONS (PLC)
Power Line Communications, or PLC, is a method of transferring meter data via the existing
electric power wires that serve each tenant in a building or customer on a utility grid.
Quadlogic employs a patented method of PLC to move large amounts of metered data for
residential and commercial and industrial (C&I) customers to a central collection point. This
robust technology dynamically responds to the varying electrical noise conditions normally
found on power lines or electrical distribution grids by changing frequency, phase etc. and is
therefore able to maintain highly reliable data communication, including passing through
distribution transformers. (Consult Quadlogic or local representative for project layout
assistance.) The MiniCloset-5c includes PLC communications as a standard feature. In most
installations, the meter data from the MiniCloset-5c is read remotely via PLC.
SCAN TRANSPONDER-5 (PLC DATA COLLECTOR AND COMMUNICATOR)
When the MiniCloset-5c is read via PLC, one or more Scan Transponder-5’s are required. The
Scan Transponder-5 is the central data collector for Quadlogic metering systems. It
communicates with Quadlogic meters over the existing electric wires that serve each tenant
in a building or customer on a utility grid.
The Scan Transponder-5 collects a data block from each meter in the system. The block
contains all previously uncollected meter readings, interval readings and event logs. This
data is stored in a non-volatile memory buffer. At regular intervals, the billing system
communicates with the Scan Transponder-5 and uploads all of the information for billing or
analysis purposes.
The Scan Transponder-5 is a separate product and requires its own installation.

Chapter 1 Introduction
© COPYRIGHT 2009 Quadlogic Controls Corporation
4
Figure 1-1. Quadlogic Scan Transponder-5.
QUADLOGIC METERING SYSTEM
The MiniCloset-5c is typically part of a comprehensive metering system within residential,
commercial, industrial or mixed-use sites. (See Figure 1-2 for a typical Quadlogic PLC
metering system.) This metering system measures electrical usage for each tenant
(customer), cost center, or common area space, and communicates this metering data over
the power distribution wires. A metering system is comprised of two or more Quadlogic
electricity meters and at least one Quadlogic Scan Transponder-5 (ST-5), which is
Quadlogic’s data collector and concentrator. The ST-5 collects metering data for up to 240
metering points via the power lines. Large sites may require additional ST-5s. Multiple ST-
5’s are typically interconnected via a data link network using RS-485 or via a wireless
network.

Chapter 1 Introduction
© COPYRIGHT 2009 Quadlogic Controls Corporation
5
Figure 1-2. Typical Quadlogic metering system.

© COPYRIGHT 2009 Quadlogic Controls Corporation
6
CHAPTER 2
ABOUT THE MINICLOSET-5C
THE MINICLOSET-5C
The MiniCloset-5c, or MC-5c, is a multi-tenant digital electric meter used for commercial,
residential or industrial applications. It meters up to 24 circuits or channels, which can be
configured as 24 single-phase/circuit loads, 12 two-phase/circuit loads, 8 three-phase/circuit
loads, or any equivalent combination. It records interval data, including hourly and 15
minute intervals, down to 5 minutes which allows flexible load profiling and Time-of-Use
(TOU) billing options. It also measures four-quadrant energy, power-down events,
frequency, etc. enabling the user to analyze power quality.
Figure 2-1. The MiniCloset-5c.
The MC-5c utilizes flash memory which enables reliable data storage and integrity without
battery reliance. In addition to metering data, it stores power quality data and a
comprehensive list of relevant events. The recorded events include: power consumption,
demand resets, power ups and power downs, time changes, and tampers. In addition to
remote reading, the consumption readings, power quality and event data are also accessible
by reading the built-in Liquid Crystal Display (LCD) or using a computer and optical probe.
(See chapter 5 for more information on the meter display.)
Using a Pulse Datalogger Module (PDM), the MC-5c is capable of collecting pulse data from
any device capable of a dry contact outputs, such as water, gas, or BTU meters. Each PDM
can count pulses for up to 12 discrete meters, and four PDMs can be daisy-chained together.
Therefore up to 48 different meters, (4x12) can be assigned to one MC-5c. Note; This data
can be recorded at different intervals than those set for the electricity readings.

Chapter 2 About the MiniCloset-5c
© COPYRIGHT 2009 Quadlogic Controls Corporation
7
SPECIFICATIONS
Metering Specifications
Metered Voltage:
Secondary Current Input:
Programmable:
Four Quadrant Consumption &
Delivered and received
Demand for each of the 24 channels:
Programmable Interval Data &
Data and Peak Demand:
Demand Reset:
Real-time data per Phase:
Time-of-Use:
Data Collection Options:
Pulse Datalogger Module (PDM-12):
Distance:
Interrogating Signal Specifications:
120, 208, 220, 230, 240, 277, 347, 380, 400, 416, 480,
600 VAC
Delta or Wye, 50/60 Hz
0.1 Amp or 5 Amp CT inputs available
(8) 3-phase meters, (12) network meters, or (24)
single-phase meters (number of meter points available will
vary by model)
Delivered and received: kW, kVARLeading,
kVARLagging, kVA, Volts-squared hours, and amp-squared
hours
5 minutes to hourly time window (longer time intervals also
available)
Meter total and/or by phase
Programmable to user-determined specific time blocks or
rolling time block demand
Allows local reset of peak demand (kW) register
Voltage, current, phase angle, power factor, THD, watts,
VARs, VA, and frequency
Up to 16 blocks per day available for all metering
parameters (Exception: Pulse input data)
IQ Software
MV-90 TIM Module
ASCII-based, open-data protocol
Open-source data conversion program
Collects data from up to 12 water, gas, or BTU meters
Form A Dry Contact Inputs
PDM connects to MiniCloset-5c via CAT5
Maximum 4 PDM units to a MC-5c (daisy chain)
Total of 48 discrete inputs total
Pulses will count during a power outage
Pulses can be logged in programmable intervals
Power supplied by MiniCloset-5c
Pulse meter to PDM - 300’ max.(18 gauge min.)
All 4 PDM’s to MC-5c - 300’ CAT5 cable
Min. Pulse Width:
Power on - 50 msec.
Power off - 500 msec.*
Max. Pulse Rate:
Power on - 10 pulses/sec max
Power off - 1 pulse/sec max
Peak voltage: 5.5V
Peak current: not applicable
Isolation: The interrogating signal is completely isolated
from the AC line, with isolation barriers rated for
at least 2.5 kV.
Max. signal debounce tolerance: 20 msec.

Chapter 2 About the MiniCloset-5c
© COPYRIGHT 2009 Quadlogic Controls Corporation
8
The pulses that are counted by the PDM consist of a 'closed' state on the external contact,
followed by an 'open' state. In order to be reliably registered, the time that the contact is
'open' must be at least the Min Pulse Width, and the time that the contact is 'closed' must
also be at least the Min Pulse Width.
* When the MC-5c loses power or is disconnected from the PDM, the PDM has the capability
to record pulses using its onboard battery for power. In this situation, the sample rate of the
PDM is reduced to decrease current drain and extend battery life.
Communications Options
Although a MiniCloset-5c is typically part of an AMR (Automatic Meter Reading) System
whereby metering data is collected by a Scan Transponder using PLC, in some cases a user
may need to communicate with the meter directly. In addition to the Power Line
Communications capability that is a standard feature of the MiniCloset-5c, the following
communications options are available:
•Local LCD (register values and certain diagnostic data are available via local LCD)
•IEC Optical Communications Interface (optical port is standard feature; optical probe
is sold separately)
•19.2k Internal Modem/RS232/RS485 (Option)
•Network Data Link (4-wire RS-485) (Option)
Accuracy:
Liquid Crystal Display:
Operating Range:
Memory:
Shipping Weight and Dimensions:
Environment:
Type Tests:
Metering Industry Standards:
±0.5% at unity power factor at any measured load between 1%
and 100% of full-scale (excluding external CT error)
±0.75% at 0.5 power factor (lead or lag)
Push button scroll
32-digit liquid crystal display (16 digits x 2 rows)
6 whole digit consumption register
Data digit height: 0.31”
Programmable display scroll & decimal place display
Rated Voltage: 90% to 110%
Temperature: -20˚C to +60˚C
512 Kbytes non-volatile flash memory
During power outage:
Flash memory retains daily and interval data
Long-life lithium battery maintains time, logs incoming
pulses and retains data acquired within the uncompleted
interval at the time of the outage
Enclosure: 18.2" H X 10.70" W X 6.1” D
Shipping weight: 1 meter assembly: 34 lbs
Enclosure: NEMA 1 rated for indoor use only.
Temperature: -20˚C to +60˚C
Humidity: 0-95% relative humidity (non-condensing)
Pollution Degree: 2
Maximum Altitude: 2000 meters
Transient/surge suppression: ANSI C37.90.1-1989
Installation Category: III. This product falls under Installation
Category III because of its distribution level, fixed installation,
and because it has a smaller transient over-voltage rating than
an Installation Category IV.
Meets ANSI: C12.1
UL and CUL: Recognized under E204142
Industry Canada: MC# AE-1148

© COPYRIGHT 2009 Quadlogic Controls Corporation
9
CHAPTER 3
PARTS AND OPTIONS
PARTS
Figure 3-1. MiniCloset-5c, Parts and Assembly
A. Meter Head – Main component of the MiniCloset-5c. The Meter Head contains the Meter
Module, through which all signals transmit, events are recorded and meter data is stored.
B. Voltage Connector – A 14-pin connector that connects the Fuse Block (C) and the Meter
Head (A).
C. Fuse Block – Provides termination for the voltage taps. It supplies power and fuse
protection to the Meter Head.
D. MC-5c Back Box – Metal box housing the metering device and the MCI board.
E. MCI – MiniCloset Interface, provides termination for the current transformers (CT).
F. Shorting Links – Provide termination for CTs when the Current Connectors are
disconnected from the meter head.
G. Communications Module (option).
H. Front Door of MC-5c.
I. Current Connectors – A 15-pin connector that connects the MCI and the Meter Head
together. Each MC-5c has 4 Current Connectors.
OPTIONS
The following options are available with the MC-5c. A suffix on the meterhead catalog number will
indicate which option or options are included with that model as indicated below.
Options
Description
Suffix for Meterhead
Need to order separate part?
Modem
Modem, RS-485, RS-232
M
No. Modem/RS-232/RS-485 is included in "M" model
meterhead.
RS-485
RS-485 only
RS
No. RS-485 is included in "RS" model meterhead.
PDM
Pulse Data Module for Form A
dry contact inputs
P
Yes. "P" model meterheads do not include the PDM
devices. PDMs need to be ordered separately. (Up to 4
PDMs can be used on one MC-5c. 12 inputs x 4 PDMs
collects 48 discrete inputs.)
Probe
Abacus Electrics Optical Probe
to download meter data locally
Not applicable
Yes.

Chapter 3 Parts and Options
© COPYRIGHT 2009 Quadlogic Controls Corporation
10
I. Modem (Modem, RS-485, RS-232)
The Modem module is an optional accessory that can be ordered with the MC-5c. It includes
a modem, RS-485 connection and RS-232 connection. The modem module connects to a
dedicated telephone line allowing remote data access directly to the device. Users can
download data or troubleshoot the system from any remote computer system.
II. RS-485
The Data Link External Communications or RS-485 module allows multiple Quadlogic meters
to be connected together in cases where PLC is not being utilized. RS-485 utilizes two (2)
shielded, twisted pairs of #16 AWG stranded wires.
Figure 3-2. MiniCloset-5c with Modem and Data Link External Communications Module.
III. Pulse Datalogger Module
(See Appendix)
IV. Abacus Electrics Optical Probe
The Abacus Electrics optical probes (Model F6Z) are bi-directional interface devices utilizing
infra-red light. By connecting to the serial port of a computer or hand-held terminal, they
permit galvanically isolated communication with the MC-5c.
Figure 3-3. The Abacus Optical Probe.
Probes are available for use with laptop or desktop computers, as well as with many of the
hand-held computers commonly used for field data collection. The probes are fitted with a
standard 9-pin 'D' connector. The optical probe is convenient to use, as no battery or power
supply connection is needed.
External
Communications Module

Chapter 3 Parts and Options
© COPYRIGHT 2009 Quadlogic Controls Corporation
11
V. Interface with Quadlogic Software (IQ)
The Interface with Quadlogic (IQ) Program allows for easy access to all metering information
necessary for basic bill generation, daily load profiling and certain customer service functions
such as acquiring as needed reads for customers moving into or out of a designated location.
Various metering parameters (Voltage, Amps, Watts, kWh, k VARh, kVAh, Power Factor and
Phase Angle for one, two or three phases) can be viewed individually or in combination.
Meters can be logically clustered, and the group totals for most metering parameters can be
viewed as well.
Color graphs can be produced for Consumption and Daily Peak Demand, as well as Demand
Logs. The program is both easy to use and provides professional presentation material.
IQ is available for purchase from Quadlogic Controls Corporation.
IQ requires the following minimum hardware and software:
Hardware:
486 or Pentium based PC
32 MB RAM minimum (64 MB RAM recommended)
CD-ROM Drive
5 MB free space on the hard drive (for the program only)
SVGA 800x600 Resolution
Config.sys: files 50/buffers 15 minimum
Color monitor
Mouse
Keyboard
At least 2400 baud or compatible modem (for remote connections only)
Telephone line (for remote connections only)
Printer (recommended)
Operating System Software:
• Windows 98, Windows NT, Windows XP
(Note: IQ is not compatible with Windows Vista)

Chapter 3 Parts and Options
© COPYRIGHT 2009 Quadlogic Controls Corporation
12

© COPYRIGHT 2009 Quadlogic Controls Corporation
13
CHAPTER 4
INSTALLATION
OVERVIEW
This chapter contains installation instructions and wiring diagrams for all MiniCloset-5c meter
models. The installation instructions start with a general procedure which applies to all meter
models, then continues with specific wiring and CT installation information for each particular
MC-5c configuration. When installing the meter, it is critical that you use the correct wiring
instructions. See pages 18 to identify the correct instructions for your meter model.
INSTALLATION CAUTIONS AND WARNING
•This manual is for persons who have received training and are qualified to work with
electricity and electrical metering equipment. All applicable national and local electrical
codes and standards must be followed. Failure to follow proper procedures may result in
damage to the equipment and/or serious bodily harm including death.
•Do not install if the device is damaged. Inspect the meter box for obvious defects such as
dents or cracks in the housing.
•If the device is installed or used in a manner not specified by the accompanying
documents, the safety of the device may be impaired.
•If the device functions abnormally, proceed with caution. The safety of the device may be
impaired.
•Do not install the meter in the presence of explosive or combustible gas or gas vapor.
•Do not install the meter on an electrical service with current or voltage outside of the
specified limits of the device.
•Do not operate the meter with the cover removed.
•To avoid electric shock, disconnect mains before replacing fuses.
•Beware of working around this meter when the voltage is live. There is a risk of electric
shock.
•To avoid electrical shock always install CT shorting links before removing meter head if
system is live.
•For protection against fire, replace only with fuses of the specified voltage and current
rating.
•See instructions for connection diagrams.
PROTECTIVE CONDUCTOR TERMINAL
Securely fasten one end of the grounding wire so that the
grounding screw cuts the paint on the back box. Securely
fasten other end of the wire to true ground connection.
When grounding to the electrical conduit, use continuous
metallic pipes, bending when necessary instead of using
couplers.
Figure 4-1. Grounding Screw.

Chapter 4 Installation
© COPYRIGHT 2009 Quadlogic Controls Corporation
14
INSTALLATION INSTRUCTIONS FOR METER, MCI, AND CTS
The use of the following procedure is mandatory both for safety and meter certification
purposes. Certification requires a visual inspection of the current transformers and the
voltage taps on the incoming feeder phase wires.
The MiniCloset-5c installation procedure consists of the following steps:
1. Install metal box
2. Optional communication module is installed, run communications wiring
3. Connect the meter’s voltage inputs to supply voltage
4. Install Current Transformers (CT) in distribution panel and connect to the meter’s
current inputs
5. Install meter head and optional communications unit, plug in to wiring harness
The installer needs to understand the following:
In order for the meter to be certified after installation, it must be possible to identify the
phase to which each voltage tap and CT is connected. Therefore, it is a requirement that all
wires be properly color-coded. Failure to color-code the wires will make it impossible to
certify the meter, and may require the entire installation to be re-done. In this document,
we use the following color code:
Black – Phase A, or Line 1 for 240V installations
Red – Phase B, or Line 2 for 240V installations
Blue – Phase C
White – Neutral (In wye installations only)
Local codes may require a different color code. If so, the installer must use the required
color code consistently for each wire connecting the meter to the distribution panel.
Step 1: Install the back box and conduit
The MC-5c back box is the enclosure for the MCI and fuse block. The MC-5c back box is
supplied with the fuse block pre-installed. If the optional communication module is ordered,
it is pre-mounted to the MC-5c front cover. The MCI board contains the 48 screw terminal
connections for the current transformers. It is supplied with the MCI and current connector
wiring harness installed, with the CT shorting links in place.
1. Locate a section of wall to mount the meter. This should be as close as possible to the
distribution panel (preferably within 24”).
2. Mount the MC-5c back box to the wall. Connect the distribution panel box to the MC-5c
back box with a metal conduit. This conduit will be used for the voltage taps. (Note: The
installer should use caution in creating punch outs other than those provided as this may
prevent the proper installation of the meter head). There will be between 2 and 4
#12AWG wires in this conduit, connected to the hot line(s) and neutral (if present). The
conduit should be sized to accommodate this. Also, a fused disconnect for the hot wires
may be required. If so, the conduit should run through the fused disconnect.

Chapter 4 Installation
© COPYRIGHT 2009 Quadlogic Controls Corporation
15
3. Run a second metal conduit from the distribution panel box to the MC-5c back box. This
conduit will be used for the CT secondary wires. In a 24-channel installation, there will
be 48 #16AWG wires. The conduit should be sized to accommodate this.
4. The metal box must be grounded. Either a ground wire may be run and attached to one
of the box mounting screws, or the box may be grounded by the conduit. Securely
fasten one end of the grounding wire so that the screw cuts the paint on the back box.
Securely fasten the other end of the wire to true earth ground connection. When
grounding to the electrical conduit, use continuous pipes, bending when necessary
instead of using couplers.
Step 2: Connect optional communications wiring
1. If using the optional communications module, you must arrange for the proper type of
communication line to be brought to the communications module box. This could be a
telephone line, an RS-232 connection, or an RS-485 connection. This communication
line will connect to other equipment on-site. The details of this connection depend on
the particular installation.
2. Refer to detailed information for optional communication in the Appendix, page 76).
Step 3: Connect voltage taps
WARNING:
Power must be off when connecting these wires!
1. Locate the incoming feeder phase (hot) wires in the distribution panel. If color coded
wiring is not being used, tape the incoming feeder wires with colored electrical tape
according to phase, for identification purposes.
2. Tap the feeder connections with #12 AWG stranded wires. These voltage connections
can be made in any way that meets local codes and requirements. It is recommended
that some means be provided to disconnect these voltage lines to facilitate servicing of
the meter (fused disconnect, breaker, etc). Note: If fused, then no less than a 15A ‘Fast
Acting’ fuses must be used. The color of the insulation on these wires must match the
color of the feeder connections to which they are attached. If neutral is required, tap the
neutral connection with a #12 AWG stranded wire with white insulation.
3. Run the #12 AWG feeder phase tap wires through the conduit to the MC-5c back box.
Connect the wires to the MiniCloset-5c Fuse Block.
Step 4: Install and connect Current Transformers (CTs)
WARNING:
Power must be off when connecting these wires!

Chapter 4 Installation
© COPYRIGHT 2009 Quadlogic Controls Corporation
16
DANGER:
Un-terminated CT secondary wires will produce hazardous electrical potentials if any current
is flowing through the CT. While connecting the CTs, POWER MUST BE OFF until the CTs
have all been connected to the MCI. Before power can be turned on, either the shorting
links must be in place, or the 4 CT connectors must be plugged in to the meter head.
Turning the power on with the meter unplugged and the shorting links removed will result in
a condition that is hazardous to equipment and personnel.
This is the general procedure for connecting the current transformers. For specific wiring
instructions, refer to page 18 to identify the current instructions for your meter model.
1. Make sure shorting links are installed on the MCI.
2. Each CT is supplied with two secondary wires. One of these wires is colored either black,
red, or blue, and the other wire is white. These 2 wires must pass through the conduit
to the MC-5c back box, and connect to screw terminals on the MCI.
3. If the wires that are supplied with the CTs are too short to reach the MCI screw
terminals, they may be extended to different length depending upon the gauge of the
wire as shown in the table 4-2. (For the file runs over 50’ use a shielded twisted pair.)
The wire extensions should be black, red, or blue wire to match the existing CT wire.
Extend the white wire of each CT with a white wire. It is very important to maintain the
association of particular CT’s secondary wires. You must keep track of which white wire
goes with each individual colored wire. It may be helpful to tape them together before
being pulling them through the conduit.
Length (feet)
Wire Size (AWG)
0.1A CT
5A CT
#16
223
21
#14
355
34
#12
562
53
#10
893
85
Table 4-2: CT wire extension length
Wire color coding may vary depending on local codes and regulatory standards within certain
jurisdictions.
Refer to the Phase Association tables later in this chapter when wiring the MCI. Failure to
observe proper phase association will result in incorrect metering data.
4. Locate the branch load hot wires that supply current from the distribution panel to the
metered loads. Disconnect these wires one (or two) at a time and properly run each wire
(or pair of wires) through a CT. The colors of the CT leads must correspond to the color
of the tape on the phase feeder wires that supply this load. The correct way to run the
load wires through the CT is different for different installations.
5. Run the CT secondary wires through the conduit to the MC-5c back box. Connect each
CT to its proper pair of screw terminals. It is very important the 2 wires from a
particular CT go to the corresponding pair of screw terminals on the MCI. For example, if
the black wire from a CT goes to terminal “I1”, then the white wire from that same CT