Cut Sheet

V1-T4-148 Volume 1—Residential and Light Commercial CA08100002E—August 2015 www.eaton.com
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4.10
Metering Products
Group Metering
Ratings
A. The assembly shall be
rated to withstand
mechanical forces
exerted during short-
circuit conditions when
connected directly to
a power source having
available fault current
[22,000] [42,000]
[65,000] [100,000]
amperes symmetrical
at rated voltage.
Construction
A. The entire assembly shall
be front accessible and
shall include [main lugs]
[a main disconnect
device].
B. Tenant disconnects
shall be wired for cold
sequence and shall be
molded case circuit
breakers.
C. The meter sockets shall
be (ring-) (ringless-) type
rated (125 A) (200 A) (as
shown on the plans)
and a bypass (shall be)
(shall not be) required.
If required, the bypass
shall be a (slider-) (horn-)
(lever-) (disconnect block-)
type. The meter sockets
and associated branch
protective device
positions shall be
completely prewired
and shipped ready for
installation of the meters
and tenant main breakers.
Meter sockets shall
include covers with
sealing positions.
Bus
A. All busbars shall be [tin-
plated aluminum or
copper]. Main horizontal
busbars shall be
mounted with all three
phases arranged in the
same vertical plane. Bus
sizing shall be based on
UL standard temperature
rise criteria for multiple
metering equipment.
B. Provide a full capacity
neutral bus where a
neutral bus is indicated
on the drawings.
C. All hardware used for
busbar connections shall
be high-tensile strength,
zinc-plated. Provide
Belleville-type spring
washers for all bus joints.
Wiring/Terminations
A. [Mechanical-type
terminals] [Crimp-type
termination provisions]
shall be provided for all
line terminations suitable
for copper or aluminum
cable and rated at 75 °C.
B. Lugs shall be provided in
the incoming line section
for connection of the main
grounding conductor.
Main Circuit Protective Devices
A. Main protective devices
shall be [molded case
circuit breakers] [bolted
pressure switches] [quick-
make/quick-break fusible
switches].
Molded Case Circuit Breakers
A. [Main] [Feeder] [All]
protective devices shall
be molded case circuit
breakers with inverse
time and instantaneous
tripping characteristics.
B. Circuit breakers shall be
operated by a toggle-type
handle and shall have a
quick-make/quick-break
over-center switching
mechanism that is
mechanically trip-free.
Automatic tripping of the
breaker shall be clearly
indicated by the handle
position. Contacts shall
be nonwelding silver
alloy and arc extension
shall be accomplished by
means of DE-ION
®
arc
chutes.
C. Circuit breakers shall
have a minimum
symmetrical interrupting
capacity as indicated on
the drawings.
D. Circuit breakers [250-]
[400-] [600-] [1200-]
ampere frame and below
shall be manufactured
by Eaton with thermal-
magnetic or electronic
trip units having
inverse time-current
characteristics.
E. Circuit breakers shall be
UL listed for series
application.
Bolted Pressure Switches
A. Main protective devices
shall be bolted pressure
contact type and shall be
UL listed.
B. Fusible switches shall be
furnished with Class L
fuse clips. Switch
contact interrupting
capacity shall be 12 times
the continuous rating
of the switch.
C. Fuse access door s
hall be mechanically
interlocked with the
operating handle and
shall have provisions for
padlocking the switch in
the OPEN position.
D. The switch shall use a
stored energy deadfront
operating mechanism
compressed and
released by the operating
handle, to provide quick
positive switching action,
independent of the
operating handle.
E. Switches shall be
manually operated.
Quick-Make/Quick-Break
Fusible Switches
A. Fusible switches 30 A
through 1200 A frames
shall be furnished with
300 V Class T-type fuse
clips unless otherwise
scheduled.
B. Switches shall
incorporate safety cover
interlocks to prevent
opening the cover with
the switch in the ON
position.
C. Provide defeater for
authorized personnel.
D. Handles shall have
provisions for padlocking
and shall clearly indicate
the ON or OFF position.
E. Front cover doors shall
be padlockable in the
CLOSED position.
F. Main protective devices
shall be quick-make/
quick-break fusible
switches as manufactured
by Eaton.
Tenant Utility Metering
A. For EUSERC serviced
areas, meter centers
shall incorporate
metering sections with
tenant feeder circuits
using ring-type meter
sockets rated [125] [200]
amperes to meet local
utility and/or customer
requirements.
B. The self-contained meter
sockets shall include a
test bypass/disconnect
block per EUSERC
requirements,
– OR–
A. For non-EUSERC
serviced areas, meter
centers shall incorporate
metering sections with
tenant feeder
circuits
using [ring-] [ringless-]
type meter sockets
rated [125] [200] [320]
amperes to meet local
utility or customer
requirements. Provide
meter sockets with
individual covers having
sealing provisions.
B. Meter sockets shall
have manual
bypass and
optional internal barriers.
Enclosures
A. NEMA 1 Enclosure
– OR–
A. Outdoor NEMA 3R
Surface-Mounted
Enclosure
Finish
A. Boxes and trims shall be
bonderized and finished
with ANSI 61 light gray
enamel.