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METER INSTALLATION
Mounting
1. Using the appropriate sized mounting hardware, fasten
the Class 200 meter enclosure to the selected mount-
ing surface. The four mounting holes are centered
6.75" H x 4" W. The mounting hole spacing is identical
for either the NEMA 12 or NEMA 4X enclosure.
NOTE: Only the NEMA 4X enclosed unit is suitable for
outdoor environmental conditions. Units housed in
NEMA 12 enclosures must only be installed in indoor
environments where it will not be affected by the ele-
ments, such as moisture and extreme temperatures.
Main Power Board Connections
1. Install a temporary ground for ESD (Electrostatic Dis-
charge) protection. With all circuits de-energized, con-
nect a temporary protective earth ground connection for
ESD protection. Prior to performing any unit wiring, be
sure to discharge any static on your person.
2. Install the Class 200 Protective Earth Ground. Connect
an earth ground wire to the Class 200 protective earth
ground terminal screw located on the bottom right side
of the main power board. After installing the protective
earth ground wire, securely fasten the protective earth
ground screw.
WARNING: Failure to attach the protective earth ground
wire securely to the enclosure creates a potential shock
hazard. Do not operate the Class 200 meter without a
protective earth ground connection securely installed.
3. Wire Entry
Two openings exist on the unit enclosure, one for 1/2
in. conduit and one for 3/4 in. conduit. The 3/4 in. con-
duit opening located on the bottom of the enclosure is
used to bring in MAINS Power (voltage lines to power
meter) and current sensor wiring. The 1/2" conduit
opening located on the top of the enclosure is used to
interface low voltage signals, such as the IDR inter-
face and isolated pulse output. (Outdoor enclosures
equipped with one 3/4" conduit opening on bottom of
enclosure only.)
Route the appropriate cabling to and through the
respective enclosure opening. The conduit and fittings
interfacing the enclosure entrances must be UL listed
and properly sized to the enclosure port diameter. The
interfacing fitting must use a gasketed seal ring to inter-
face between the conduit fitting and the enclosure entry
point. After installing the conduit fitting and conduit,
verify that the conduit fittings are aligned properly to
their respective enclosure entrance ports and tightened
securely to prevent moisture entry. VERIFY that each
conduit slip nut is securely tightened to its respective
conduit fitting.
Outdoor applications require the use of the optional
NEMA 4X enclosure. The same principles outlined
for indoor meter installations as defined in the afore-
mentioned paragraph carry over and apply to outdoor
installations with one exception. This exception is that
the conduit and fittings for outdoor installations require
an outdoor material rating.
4. Unit MAINS Wiring (Voltage Wiring Connections)
Remove the clear shield located over terminal block
TB1 on the main power board. This shield can be re-
moved by pressing in on each locking tab located at the
top of each standoff. While pressing the tabs inward,
lift the shield from the standoffs. Wire each connection
to Terminal Block TB1 with stranded wire 14-12 AWG,
rated at 600 VAC.
Strip back all wire insulation to expose between 1/4 in.
and 3/8 in. of the copper conductors. Gently twist each
wire to prevent fraying. Insert the conductors into their
respective terminal block position and tighten down
the terminal block screw to securely fasten the conduc-
tor. Terminal block TB1 is clearly labeled PHASE A,
PHASE B, PHASE C and NEUTRAL.
Connect the NEUTRAL wire to the appropriate terminal
block position.
NOTE: For Delta MAINS input wiring, DO NOT connect the
NEUTRAL wire. Remove the terminal block screw
for this position.
Connect the AC mains power wires (Phase A, Phase B
and Phase C) to their respective positions as labeled
on terminal block TB1.
After all conductors are connected to their respective
terminal block positions and tightened down, verify
that each terminal block screw is securely fastened by
gently tugging on each conductor. Verify no conductor
wires are frayed or are shorting to adjacent terminal
block positions.
5. External Switch Mechanism/In-Line Fuse Installa-
tion. To ensure a safe installation, the Class 200 meter
requires an external switch mechanism, such as a
circuit breaker, be installed on the Class 200 MAINS
input wiring. The switch mechanism must be installed
in close proximity to the meter and easily reachable for
the operator. This device must also be marked as the
disconnecting device for the Class 200 meter.
Install 1/10 Amp Slow Activation inline fuses with the
suitable voltage rating for each conductor phase at the
MAINS input to the meter. The fuses must be labeled to
indicate voltage and current rating as well as element
7
GREEN CLASS METER
62-0340-01
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