Measurement Guide
NOTES:
6.00
[152]
A.B,C
KNOCKOUTS
.28
[7]
(J
HOLES)
A,B,C
KNOCKOUTS
7
50
1[191~--~
A,B,C,D
KNOCKOUTS
FINISH
-
GRAY
BAKED
ENAMEL
ELECTRODEPOSITIED
OVER
CLEANED
PHOSPHATIZED
STEEL.
UL
LISTED
-
FILE
E-2675
ALL
NEUTRALS
-
INSULATED
GROUNDABLE
SUITABLE
FOR
USE
AS
SERVICE EQUIPMENT
TOP
OF
NENA
TYPE
JR
SWITCHES
HAVE
PROVISIONS
FOR
!AAXIMUM
2 1
/2•
BOLT
-ON
HUB.
SHORT CIRCUIT CURRENT RAllNGS:
•
10,000
AMPERES.
10,000
AMPERES
WHEN
USED
WITH
OR
PROTECTED
BY
CLASS
H
OR
K
FUSES.
100,000
AMPERES
WITH
CLASS
R
FUSES.
*
FOR
CORNER
GROUNDED
DELTA
SYSTEMS.
• PLUG FUSES
:j:
LUGS
SUITABLE
FOR
60'C
OR
75'
CONDUCTORS.
'r-r----------+1
NEMA
lYPE
.3R
ILLUSTRATED
9.00
[229]
A,B,C
KNOCKOUTS
CATALOG
NUMBER
0211NRBe•
0221
NRB
0321
NRB
OU221RB
OU321RB
GENERAL
DUTY
SAFETY
SWITCHES
VISIBLE
BLADE
TYPE
30
AMPERE
ENCLOSURE
-
NEMA
TYPE
JR
RAINPROOF
VOTAGE
WIRING
RATINGS
OIAG.
240VAC A
240VAC A
240VAC
B
240VAC
c
240VAC
D
A
B
WIRING
DIAGRAMS
FUSIBLE
NOT
FUSIBLE
~J
cH
Cl--ffiZffi-o
JJJ
D
H-1
Cl--ffiZffi-o
TERMINAL
WGS
:t:
At.IPERES MAX.
WIRE
MIN.
WIRE
lYPE
L'
6
AWG
_l#
12
AWG
AL
30
I 6
AWG
H
14
AWG
cu
KNOCKOUTS
SYMBOL
A B c D
CONDUIT SIZE
.50 .75
1
1.25
.
INCHES
DUAL
DIMENSIONS.
MILLIMETERS
HORSEPOWER
RATINGS
120VAC
240VAC
STD.
MAX.
STD.
""'·
10 10
10
30
10
30
1/2
2
1
1/2
- 3 -
- -
1
1/2
3'
3 7
1/2"'
- -
1
1/2
3 3 7
1/2
- - - - 3 -
- - - - 3 7
1/2