Cut Sheet

Volume 1—Residential and Light Commercial CA08100002E—August 2015 www.eaton.com V1-T1-29
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1.1
Loadcenters and Circuit Breakers
Type CH Loadcenters and Circuit Breakers
Technical Data and Specifications
General
A. The Contractor shall
furnish and install
loadcenters incorporating
circuit breakers of the
number, rating and type
as specified herein and
as shown on the
contract drawings.
B. The loadcenter and all
components shall be
designed, manufactured
and tested in accordance
with the latest applicable
standards of UL and
NEMA including:
1. UL 67—standards for
panelboards
2. UL 50—standards for
cabinets and boxes
3. UL 489—standards for
molded case circuit
breakers
4. Federal Spec
Classification W-C 375
5. UL 1699—all fault
interrupting
Qualifications
A. The manufacturer of the
loadcenter shall be the
manufacturer of the
circuit breaker within the
load center. All breakers
shall be full size.
B. For the equipment
specified herein, the
manufacturer shall be
ISO
®
9000 certified.
C. The manufacturer of
this equipment shall have
produced similar
electrical equipment
for a minimum period
of seven (7) years.
Manufacturers
A. Eaton
Ratings
A. Loadcenters shall be
rated for 240 Vac and
shall have short-circuit
ratings as shown on the
drawings or as herein
scheduled, but not less
than 10,000 amperes
rms symmetrical.
B. Breakers shall be full
size and a minimum of
125 A frame. Breakers
10 –125 A trip size shall
take up the same pole
spacing.
C. Loadcenters shall be
labeled with a UL short-
circuit rating. When
series ratings are applied
with integral or remote
devices, a label shall be
provided. Series ratings
shall cover all trip ratings
of installed frames. It
shall state the conditions
of the UL series ratings
including:
1. Size and type of
upstream device.
2. Branch devices that
can be used.
3. UL series short-circuit
rating.
Construction
A. All interiors, with the
exception of the branch
circuit breakers shall be
completely factory
assembled with main
breakers, main lugs or
no main device.
B. Interiors shall be so
designed that circuit
breakers can be replaced
without disturbing
adjacent units and
without removing the
main bus connectors and
shall be so designed that
circuits may be changed
without machining,
drilling or tapping.
C. Physical means must
be provided to prevent
the installation of more
overcurrent devices than
that number for which
the enclosure was
designed. Full size
breakers are required.
Bus
A. Busbars for the main and
cross connectors shall be
of silver flash plated
copper construction in
accordance with UL
standards. Bussing shall
be braced to 65 kAIC.
B. Neutral bussing shall
have a suitable lug for
each outgoing feeder
requiring a neutral
connection of same
ampacity as branch.
Wiring/Termination
A. All wire connectors and
terminals shall be of the
anti-turn solderless type
and suitable for copper
or aluminum wire of the
sizes indicated. All
connectors shall meet
the “Requirements
for Wire Connectors
and Soldering Lugs”
UL 486B.
B. All loadcenters where
marked shall be suitable
for use with 60/75 °C
rated wire.
Circuit Breakers
A. Circuit breakers shall
be molded case type,
3/4-inch (19.1 mm) wide
per pole. Multipole circuit
breakers shall be of a
stack pole design to
provide electrical phase
isolation and have an
internal common trip.
B. Each pole of the circuit
breaker will have inverse
time
delay overload and
instantaneous short-
circuit protection by
means of both thermal
and magnetic sensors.
Circuit breakers shall be
quick-make/quick-break.
C. The circuit breaker
calibration shall not be
affected by environmental
changes in relative
humidity. Breakers
shall be calibrated
after assembly.
D. All circuit breakers shall
be operated by a toggle-
type handle and multipole
circuit breakers shall have
an internal common trip
mechanism. The circuit
breakers shall incorporate
trip mechanisms that are
mechanically trip-free
from the handle. The
handle position shall
provide good visual
trip indication.
E. Contacts shall be of non-
welding silver alloy.
F. All branch breaker
handles shall be of a
different color than the
case of the breaker.
G. All terminals shall be
listed for use with copper
or aluminum conductors.
Terminals shall be of the
box lug design. The
terminals shall meet
UL 486B requirements
and shall be suitable for
use with either 60 °C or
75 °C wire.
H. Breakers shall be SWD
rated and/or HACR rated
as required.
I. Arc fault interrupting
circuit breakers, (AFC),
shall be provided on all
15 and 20 A single-phase
120/240 Vac circuits
except those indicated as
remote controlled
breakers. AFI breakers
shall be “Classified for
mitigating the effects of
arcing faults,” or
conforming to UL
Standard 1699 and as
defined by per Article
210.12 Section A of the
NEC Code.