Cut Sheet

V1-T1-28 Volume 1—Residential and Light Commercial CA08100002E—August 2015 www.eaton.com
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1.1
Loadcenters and Circuit Breakers
Type CH Loadcenters and Circuit Breakers
Approximate Dimensions in Inches (mm)
Residential and Commercial Loadcenter Knockout
Residential NEMA Type 1 indoor and NEMA Type 3R outdoor enclosures.
Knockouts for Box Sizes 8, 8R, P, PM, B, C, D, E, G, J, K, L, N
and Outdoor Boxes 12–60 Circuits
Knockout Diagram
Type ECB and ECC Unit Enclosure Knockout
NEMA Type 1—Indoor
NEMA Type 3R—Outdoor
Code Diameter
a 0.75 (19.1) — — — —
b 0.50 (12.7) 0.75 (19.1) — — —
c 0.50 (12.7) — — — —
d 1.00 (25.4) 1.25 (31.8) 1.50 (38.1) 2.00 (50.8) 2.50 (63.5)
e 1.25 (31.8) 1.50 (38.1) 2.00 (50.8) 2.50 (63.5) —
f 0.75 (19.1) 1.25 (31.8) 1.50 (38.1) 2.00 (50.8) —
g 0.50 (12.7) 0.75 (19.1) 1.00 (25.4) — —
h 1.50 (38.1) 2.00 (50.8) 2.50 (63.5) — —
i 0.50 (12.7) 0.75 (19.1) 1.00 (25.4) 1.25 (31.8) 1.50 (38.1)
j 1.00 (25.4) 1.25 (31.8) 1.50 (38.1) — —
k 1.25 (31.8) 1.50 (38.1) 2.00 (50.8) — —
m 0.75 (19.1) 1.00 (25.4) 1.25 (31.8) 1.50 (38.1) 2.00 (50.8)
n 0.75 (19.1) 1.00 (25.4) 1.25 (31.8) 1.50 (38.1) —
p 2.00 (50.8) 2.50 (63.5) — — —
e
e
e
e
d
c
c
c
c
c
b
b
i
c
c
c
c
c
b
g
b
c
c c c
a
Flush
Trim
3/4
c
h
b
b
e
g
b
b
c
c
c
g
e
b
e
g
b
b
c
c
c
g
e
e
e
e
e
gg
d
c
c
c
c
c
b
b
i
c
c
c
c
c
b
g
b
c
d
c
c
c
c c
b
b
i
c
c
c
c
c
b
g
b
c
0.45 Dia.0.45 Dia.
0.45 Dia.0.45 Dia.
b
e
g
b
b
c
c
g
e
e
e
e
e
g
g
b
c
c
b
e
g
b
b
c
c
c
g
e
b
c
d
c
c
c
c
c
b
b
i
c
c
c
c
c
b
g
b
c
d
c
c
c
c c
b
b
i
c
c
c
c
c
b
g
b
c
0.45 Dia.0.45 Dia.
Box P, PM
Outdoor Boxes
12–42 Circuits 225 A Maximum
Box B
Box C, D, E, G, J, K, L, N
0.45 Dia.0.45 Dia.
0.45 Dia.0.45 Dia.
Code Diameter
NEMA Type 1 Indoor (Flush and Surface Trims)
A 0.50 (12.7) — — — —
B 1.25 (31.8) 1.50 (38.1) 1.75 (44.5) 2.00 (50.8) 2.50 (63.5)
NEMA Type 3R Outdoor
A 0.50 (12.7) — — — —
B 1.25 (31.8) 1.50 (38.1) 1.75 (44.5) 2.00 (50.8) 2.50 (63.5)
B
B
B
B
A
A
B
B
B
B
B
B
A
B B
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