Dimension S h eet
29-1 70C
Page 1 0
Westinghouse AB DE-ION® Current Limiting Circuit Breakers
Type NB Tri-Pac Circuit Breaker, Drilling Plans
For Mounting Bolts
(Front Connected Term inals)
.375(9.52) Dia.
for .312 - 1 8 Tap
(4) Holes
8.625
---<l.Ha,ndle
;··-
i
20.750
52
r
4)
1
12.12s ,
Bolted Rear Connected Studs
For 300-450 Amps
1 .000(25.39)
Minimum
Insolated
Panel
1 . 1 25(28.56) -
12 Threads
Omit from Center Pole
for 2-Pole Breaker
t
r- '
1 .000 (25.39)
Minimum
Insolated
Panel
Outside Poles Stud
Style Number
373B375G04
Center Pole Stud Style
Number 373B375G03
(Omit for 2-Pole Breaker)
1 .250(31 .74) -
12 Threads
For Rear Connected Studs
Omit Holes in
Center Pole for
2-Pole Breaker
I
10oo
___j_<iHandle
.L -
I
I,
�""
7 .. 73)
1
-
�
-
t
-
17.500
I
(444.33)
1
10.500
I
(266.60)
I !
'
6 Holes for 3-Pole Breaker
4 Holes for 2-Pole Breaker
Front Cover Cutout
. 1 25 R
(3. 171 R
3 250
182 52)
Front Connected Terminals
Catalog
Number
Ampere Wire
Rating
Size
For Use With Cu/AI Cable (Supplied as Standard)
TA700 NB 1
TA1000 NB 1 300-700
Two #1-500 MCM
800
Three #3/0-400 MCM
For Use With Copper Cable Only (Optional)
.438 ( 1 1 . 1 1 ) Dia.
Mounting Holes
(4 Total)
.531
(13.49)
.219
(5.55)
T350 NB
noo
NB 1
T1000 NB 1
300-350
400-700
BOO
Single Cable 1-600 MCM
Double Cable 2/0-500 MCM
Triple Cable 3/0-500 MCM
'
-
,
(
.563(1 4.28)
Diameter
/
(4 Holes)
Reproduced from drawing
3720515
Dimensions in parentheses in millimeters
Reproduced from drawing
4990038
Cutler-Hammer
Westi ng house
&
Cutler-Hammer Products
Five Parkway Center
Pittsburgh, Pen nsylva n ia, U .S.A. 1 5220
Printed in U.S.A.
January 1995
www
. ElectricalPartManuals
. com
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