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D i m e n s i o n S h eet
29-1 70C
Page 1 0
Westi n g house AB DE-ION® Cu rrent Limiti ng Ci rcuit Breakers
Type NB Tri-Pac Circuit Breaker, Dri lling Plans
For Mounting Bolts
(Front Connected Term inals)
.375(9.52) Dia.
for .312 - 1 8 Tap
(4) Holes
; · · -
8.625
- -- <l. Ha , n dle
1
20.750
52
12.12s ,
Bolted Rear Connected Studs
For 300-450 Amps
1 .000(25.39)
Minimum
Insolated
Panel
t
1 . 1 25(28.56) -
12 Threads
Omit from Center Pole
r- '
for 2-Pole Breaker
1 .000 (25.39)
Minimum
Insolated
Panel
Outside Poles Stud
Style Number
373B375G04
Center Pole Stud Style
Number 373B375G03
(Omit for 2-Pole Breaker)
Reproduced from drawing
3720515
&
Cutler-Hammer
Westi ng house
Cutler-Ha m m e r Prod ucts
Five Parkway Center
Pitts b u r g h , Pe n nsylva n ia, U . S.A. 1 5220
For Rear Connected Studs
i
I
r
___j_ < iHandle
4)
Front Cover Cutout
. 1 25 R
(3. 1 7 1 R
Front Connected Terminals
Catalog
Number
For Use With Cu/AI Cable (Supplied as Standard)
noo
TA700 NB 1
TA1000 NB 1
For Use With Copper Cable Only (Optional)
T350 NB
NB 1
1 .250(31 .74) -
T1000 NB 1
12 Threads
Dimensions in parentheses in millimeters
Omit Holes in
Center Pole for
2-Pole Breaker
10oo
I
-
-
t
1
I,
7
7
3 )
�""
.
�
.L -
-
I
.
17.500
(444.33)
I !
1
10.500
I
(266.60)
'
6 Holes for 3-Pole Breaker
4 Holes for 2-Pole Breaker
3 250
182 52)
.438 ( 1 1 . 1 1 ) Dia.
Mounting Holes
(4 Total )
Wire
Ampere
Rating
Size
7
Two #1-500 MCM
300-
00
BOO
800
Three #3/0-400 MCM
300-350
Single Cable 1-600 MCM
400-700
Double Cable 2/0-500 MCM
Triple Cable 3/0-500 MCM
(
/
.563(1 4.28)
Diameter
(4 Holes)
.531
(13.49)
.219
(5 . 55)
-
,
'
Reproduced from drawing
4990038
Printed i n U.S.A.
January 1995
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