Cutler Hammer, Div of Eaton Corp KNOCKOUT Technical Data
Technical Data and Specifications
RESIDENTIAL/COMMERCIAL/
UNIT ENCLOSURE — BOX SIZES
TABLE 2-26. RESIDENTIAL LOADCENTERS
Dimensions in Inches Dimensions in mm
Box
Size
Height
Loadcenters
NEMA Type 1 Indoor
5
6
7
B
C
D
E
G
J
K
L
NEMA Type 3R Outdoor
5R
6R
7R
B
C
D
E
G
J
K
L
TABLE 2-27. COMMERCIAL LOADCENTERS
Box
Size
NEMA Type 1 Indoor
P
PM
TABLE 2-28. TYPES ECB AND ECC UNIT ENCLOSURES
9.50
11.38
13.00
16.75
21.00
29.13
29.13
34.13
34.13
37.00
39.00
9.50
11.75
13.00
16.75
21.00
29.13
29.13
34.13
34.13
37.00
39.00
Dimensions in Inches Dimensions in mm
Height
54.38
62.63
Width Depth Height Width Depth
4.50
6.88
11.00
14.31
14.31
14.31
14.31
14.31
14.31
14.31
14.31
4.50
6.50
11.00
14.31
14.31
14.31
14.31
14.31
14.31
14.31
14.31
3.13
3.39
3.69
3.88
3.88
3.88
3.88
3.88
3.88
3.88
3.88
3.13
4.50
3.69
5.19
5.19
5.19
5.19
5.19
5.19
5.19
5.19
241.3
288.9
330.2
425.5
533.4
739.8
739.8
866.8
866.8
939.8
990.6
241.3
298.5
330.2
425.5
533.4
739.8
739.8
866.8
866.8
939.8
990.6
114.3
174.6
279.4
363.5
363.5
363.5
363.5
363.5
363.5
363.5
363.5
114.3
165.1
279.4
363.5
363.5
363.5
363.5
363.5
363.5
363.5
363.5
79.4
86.1
93.7
98.4
98.4
98.4
98.4
98.4
98.4
98.4
98.4
79.4
114.3
93.7
131.8
131.8
131.8
131.8
131.8
131.8
131.8
131.8
Width Depth Height Width Depth
21.00
21.00
6.00
6.00
1381.1
1590.7
533.4
533.4
152.4
152.4
RESIDENTIAL LOADCENTER KNOCKOUT
DIMENSIONS IN INCHES (MM)
Residential NEMA Type 1 Indoor and NEMA Type 3R
Outdoor Enclosures.
TABLE 2-29. KNOCKOUTS FOR BOX SIZES 5, 6, 7, 5R, 6R, 7R
Code Diameter in Inches Diameter in mm
A
B
C
D
E
F
G
H
I
.50
.50
.50
.50
.75
.75
1.00
1.00
1.25
D
D D D
F F
A
F
—
.75
.75
.75
1.00
1.00
1.25
1.25
1.50
F
A
A
F
Box 5 Box 5R
B
A
C
B
F
A
B
Box 6
—
—
1.00
1.00
1.25
1.25
1.50
1.50
2.00
A
A
A
A
B
H
A
C
A
H
B
—
—
—
1.25
—
1.50
—
2.00
—
F
B
A
F
12.7
12.7
12.7
12.7
19.1
19.1
25.4
25.4
31.8
D D D
—
19.1
19.1
19.1
25.4
25.4
31.8
31.8
38.1
F
D D
F
B B
Box 6R
—
—
25.4
25.4
31.8
31.8
38.1
38.1
50.8
Hub
A
A
Hub
B
H
—
—
—
31.8
—
38.1
—
50.8
—
Dimensions in Inches Dimensions in mm
Height Width Depth Height Width Depth
NEMA Type 1 Indoor
23.25 8.88 4.50 590.6 225.4 114.3
NEMA Type 3R Outdoor
23.69 9.31 5.44 601.7 236.5 138.1
Note: Box sizes do not include covers/fronts.
B B B
C
G
AAAA
G
G
B
A
C
C C
C
G G
AAA AAA
B
C
Box 7 Box 7R
FIGURE 2-1. KNOCKOUT POSITIONS
AAA
B
B
B
F
G
A
B B
Hub
G G
C
B
C
AAA AAA
G
F
A
B B
2-18 EATON CORPORATION Cutler-Hammer Retail Solutions Book — 1-877-932-9322 — Loadcenters — Effective August 2005
RESIDENTIAL AND COMMERCIAL LOADCENTER KNOCKOUT DIMENSIONS IN INCHES (MM)
gg
Residential NEMA Type 1 Indoor and NEMA Type 3R Outdoor Enclosures.
TABLE 2-30. KNOCKOUTS FOR BOX SIZES 8, 8R, P, PM, B, C, D, E, G, J, K, L AND OUTDOOR BOXES 12-42 CKT
Code Diameter in Inches Diameter in mm
a
b
c
d
e
f
g
h
i
j
k
m
n
p
.75
.50
.50
1.00
1.25
.75
.50
1.50
.50
1.00
1.25
.75
.75
2.00
e
e
b
b
c
g
Outdoor Boxes
12-42 CKT 225A Maximum
e
.450 Dia..450 Dia.
d
—
.75
—
1.25
1.50
1.25
.75
2.00
.75
1.25
1.50
1.00
1.00
2.50
b
i
b
—
—
—
1.50
2.00
1.50
1.00
2.50
1.00
1.50
2.00
1.25
1.25
—
e
Flush
Trim
3/4
—
—
—
2.00
2.50
2.00
—
—
1.25
—
—
1.50
1.50
—
c
—
—
—
2.50
—
—
—
—
1.50
—
—
2.00
—
—
b
h
Box P, PM
19.1
12.7
12.7
25.4
31.8
19.1
12.7
38.1
12.7
25.4
31.8
19.1
19.1
50.8
e
g
c
c
c
g
e
—
19.1
—
31.8
38.1
31.8
19.1
50.8
19.1
31.8
38.1
25.4
25.4
63.5
c
d
c
c
d
c
Box B
c
c
c
c c
.450 Dia..450 Dia.
b
c
c
g
c
e
e
.450 Dia..450 Dia.
c
b
c
i
c
b
c
i
b
c
e
b
b
b
e
c
b
b
c
c
g
c
—
—
—
38.1
50.8
38.1
25.4
63.5
25.4
38.1
50.8
31.8
31.8
—
b
e
g
b
b
c
b
g
e
b
g
c
c
c
c
c
c
g
—
—
—
50.8
63.5
50.8
—
—
31.8
—
—
38.1
38.1
—
c
c
b
b
e
b
b
b
b
e
b
g
d
c
i
c
c
g
e
e
c
c
b
d
c
c
c
c
Box C, D, E, G, J, K, L
g
c
c
c
c c
—
—
—
63.5
—
—
—
—
38.1
—
—
50.8
—
Loadcenters
—
.450 Dia..450 Dia.
b
b
c
c
g
c
e
e
.450 Dia..450 Dia.
c
c
e
g
b
c
b
c
c
b
c
b
g
e
b
i
b
FIGURE 2-2. KNOCKOUT DIAGRAM
TABLE 2-31. TYPE ECB AND ECC UNIT ENCLOSURE KNOCKOUT
Code Diameter in Inches Diameter in mm
NEMA Type 1 Indoor (Flush and Surface Trims)
A .50 ————12.7 — ———
B 1.25 1.50 1.75 2.00 2.50 31.8 38.1 44.5 50.8 63.5
NEMA Type 3R Outdoor
A .50 ————12.7 — ———
B 1.25 1.50 1.75 2.00 2.50 31.8 38.1 44.5 50.8 63.5
B
B
B
B
HUB
B
B
B
B
B B
Indoor
B
B
Outdoor
FIGURE 2-3. NEMA TYPE 1 FIGURE 2-4. NEMA TYPE 3R
EATON CORPORATION Cutler-Hammer Retail Solutions Book — 1-877-932-9322 — Loadcenters — ©Copyright 2005 2-19
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