January, 1 989
Westinghouse Electric Corporation
Distribution and Control Busi ness Unit
E lectrical Components Division
Pittsburgh, Pennsylvania, U.S.A. 1 5220
Type NB T R I - PAC® Circuit Breakers
Supersedes Dimension S heet 29-1 70,
pages 49-50, dated Novem ber, 1 98 1
M a i led to: E, D, C/29-1 00A, 3 1 -400A,
Page 49: Outline Dimensions, Drilling Plans
Page 50: M ou nting B lock Dimensions
3 1 -500A
Type NB, TRI-PAC® Breaker@
�-13
Top
Line End
I
4
•••
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a
, .
••
�'*'
.:..-,
-:..--
.,., ..
FronT Connected
Drilling Plans
For Mounting Bolts
( F ront Connected Term 1nals)
Line End
l
1
� Handle
j
Load End
'
zol
ft. Breaker
Reproduced From
Drawing 372D5 1 5
(i
Changed since previous issue.
5
7
Front Connected Terminals(!)
Amp
Catalog No.
Wire Size
Rating
For AUCU Cable (Standard)
300 to 700 TA700 NB 1
Two # 1 -500 MCM
BOO
TA1000 N B 1 Three #3/0-400 MCM
For Copper Cable (Optional)
17�
300 to 350 T350 NB
Single Cable 1 to 600 MCM
400 to 700 T700 N B 1
Double Cable 2/0 to 500 MCM
BOO
T1 000 NB 1
Triple Cable 3/0 to 500 MCM
Dimension S heet
29- 1 70
AB DE-ION®
Circuit B rea kers
Bolted Rear Connected Studs
Fo
r
300
to
450
Amps
I
T
l inch
Mtnrmum
Insulated
Pone I
Style
N o
A
·-·-------
6238222G01
5' ,
6238222G02
8
6238222G03 1 0 ' ,
F or 500
t o
8 00
Amps Only
L[_
T -
1
Inch
Mcntmum
Insulated
Panel
Outstde Poles Stud
Style Number
3738375G04
Page 49
Center Pole Stud
Number 3738 375G03
( Om•t for 2 Pole BreokerJ
F ront Cover Cutout
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