February 1 991
Westinghouse Electric Corporation
Distribution and Control Business U nit
E lectrical Components Division
Pittsburgh, Pennsylvania, U .S.A. 1 5220
Type N B and M A R K
75®
Type H N B
Supersedes Dimension Sheet 29-1 70,
pages 35-36, dated November 1 981
Mailed to: E, D, C/29-1 00A, 31 -400A,
Page
35:
Type N B, M A R K
75®
Type H N B
Page
36:
M o u nting B lock for Type N B ,
M A R K
7 5
H N B, SELT R O N I C™ Types N C,
M A R K
75
H N C
31 -500A
Type NB,
MARK 75®
Type HNB Breakers
Current Corryonq Parts
Omilted from Center
Pole
!01 2
Pole BreaKer
Line End
Load End
Front Connected Terminals&
Ampere
Rating
Catalog No.
Wire Size
AUCU Terminals (Supplied as Standard)
700-1 000
TA1000 NB1
Triple Cable 3/Q---400 MCM
1200
TA1200 NB1
Four Cable 4/0-500 MCM
Copper or AUCU Terminals (Must Be Specified)
700-1000
1200
1200
T1000 NB1
T1200 NB1
TA1201 NB1
Triple Cable 3/0--500 MCM
Four Cable 3/Q---400 MCM
Triple Cable--500-750 MCM
Dimension Sheet
29-170
AB DE-ION®
Circuit B reakers
B olted Rear C onnected
S tuds
For
700
to
800
Amps
Om1t from Center Pole
for 2 Pole Breaker
Style No
A
623B222G01
5Y,
623B222G02 8
6238222G03 1
O Y,
'a
12 Threads
For
900
to
1200
Amps Only
Page 35
t -
l inch
Mm1mum
Insulated
Panel
Center
Pole Stud Styl�
Number
3738375G03
( Qm!l for 2 Pole Breaker)
D rilling Plans
F ront C over C utout
For Mounting Bolts
(Front Connected Ter minals)
2�
�Doometer or
I�
4
.3� ���;�p
Line End
!
I 8�
I
I
j
JJ,4l
'-"'"d'•+ f
14
' .
Load End
'-8"""
Reproduced From Drawing 371 0578
For Rear Connected Studs
( I nsulated Panel)
Line End
__
<t_
Breaker
Style No
A
623B222G01
5 Y,
623B222G02 8
623B222G03 1
OY,
8
Changed since previous issue.
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