Installation Instructions

MTU Instructions
General Installation and Wiring Guidelines
Recommended Tools
• Cordless drill (⅜”, variable speed,
1800-2000 rpm, adjustable torque
settings)
• Drill bit, ¼”, carbide tipped
• Drill bit, ¼” x 12”, carbide tipped
• #2 Phillips power screwdriver bits
• Stapler for ¼” wire and cable
(Arrow T-25M)
• Diagonal side cutters/wire cutters
• Needle nose pliers – small
• Wire stripper
• Connector crimping tool 3M 9EY
• Safety goggles
• Screwdriver, #1 Phillips
• Screwdriver, #2 Phillips
• Screwdriver, 5/16” slotted
• Screwdriver, ¼” slotted
• Screwdriver, small slotted, ⅛”
blade
• Hammer
• Clipboard
• Flashlight with batteries
• Extension cord with trouble light
• MTU Programmer with cable,
programming coil and STAR
Programming Software
MTU Wiring
General - Many MTUs connect to the
meter by means of a 3-conductor, 22-
gauge solid conductor wire. The wire is
housed in a PVC jacket with UV
inhibitors. A black-jacketed wire is
supplied on single-port MTUs and for port
1 of dual-port MTUs. A grey jacket is
used for the port two input to dual port
MTUs.
Wire Length – MTUs are provided with a
standard wire length of 12 feet. Additional
wire may be used if necessary. A
maximum run of up to 500 feet can be
used to position the MTU in a favorable
location. Use like-colors for cable jackets
and individual wires when extending MTU
wiring.
Some specific meters may impose other
wire length limitations. Consult the meter
manufacturer.
Wire Routing - Wires should be attached
to walls with 9/16” staples. If wire
clearance holes are needed to route wire
from the meter to the MTU, drill a ¼” hole
using an appropriate drill bit. The installer
is responsible for the selection of an
appropriate location for any hole to be
drilled.
Note: Wiring must be in accordance with
all national and local codes.
Wire Protection - A drip loop below the
MTU is not required.
Inspect wire to ensure that routing and
stapling have not caused wire damage.
Pull the wire lightly at each staple to
make sure that the staple is not set too
tightly.
Any splices made to wire must be
suitable for the environment and made in
accordance with national and local codes.
Page 5