Rockwell Automation Publication 2100-IN012G-EN-P - August 2016 17
General Information Chapter 1
ArcShield Rating Labels
MCC units that have the arc resistant rating carry a rating label on the vertical
wireway door. This label serves as the arc resistant nameplate and provides
information on the arc resistant rating. There are labels on other parts that
need to be in place before operating an arc resistant MCC.
Figure 7 - ArcShield Labels
Series Number and Series ID
as Manufactured in the
United States
ARC RESISTANT EQUIPMENT
ACCESSIBILITY: TYPE 2
ARC SHORT CIRCUIT CURRENT: ≤ 65 kA
ARC DURATION: DEVICE LIMITED
PROTECTIVE DEVICE:
UL LISTED FUSES
CLASS L – ANY FUSE ≤ 1200 A
CLASS R – ANY FUSE ≤ 600 A
CLASS J – ANY FUSE ≤ 600 A
UL LISTED MOLDED CASE CIRCUIT BREAKERS
ALLEN-BRADLEY – BULLETIN 140U, FRAME I, JD, or K
CUTLER-HAMMER – SERIES C, FRAME F, J, K, L, M, or N
SQUARE D - POWERPACT FRAME M (480V AC ONLY)
WARNING
PER IEEE C37.20.7 2007
ARC FLASH HAZARD
THE ARC CONTAINMENT CAPABILITY OF THE MOTOR
CONTROL CENTER IS DEPENDENT UPON THE MAIN
PROTECTIVE DEVICE. PROTECT ONLY WITH UL LISTED
PROTECTIVE DEVICE SPECIFIED ABOVE.
DOORS AND COVERS MUST BE PROPERLY CLOSED,
LATCHED, AND SECURED. EQUIPMENT MUST BE INSTALLED
PER MANUFACTURER’S INSTRUCTIONS.
REFER TO PUBLICATION 2100-IN012.
EQUIPMENT WILL NOT FUNCTION AS ARC RESISTANT IF
ABOVE GUIDELINES ARE NOT FOLLOWED.
FAILURE TO FOLLOW THESE GUIDELINES COULD RESULT IN
SEVERE INJURY OR DEATH.
PN-240698
ALLEN-BRADLEY – BULLETIN 140G, FRAME G, H, J, K, M, or N
NOTE: 140G-N MUST HAVE INSTANTANEOUS TRIP FUNCTION
ON AND SET NO HIGHER THAN 12,000A
100 ms Arc Duration
Device Limited Rating
ATTENTION: Read tables 1 through 4 before adding new sections or units to
an existing CENTERLINE MCC.
Table 1 - Sections
Series
Letter
Scope Description of Change Date Implemented in
the U.S.
A
(1)
— Original design February 1971
B
(1)
All Changed terminal blocks November 1976
C
(1)
All Elimination of external mounting channels June 1979
D
(1)
All Reverse fed 2192 and 2193 April 1981
E
(1)
All Redesign gasketing October 1982
F
(1)
All Modified top horizontal wireway pan to accept units with handle interlock in topmost space factor October 1983
G
(1)
42K 42 k bracing-incorporates new bus support and cover January 1985
G
(1)
65K 65 k bracing-incorporates new bus support and cover July 1985
H All New hinge design January 1986
J All Changed handle, operating mechanism, and circuit breaker to Cutler-Hammer series C, 150 A, 250 A, 400 A frame October 1986
K All Changed to new unit grounding system May 1990
L All Changed to new 600…1200 A circuit breaker operating mechanism February 1996
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