Cut Sheet

V1-T1-70 Volume 1—Residential and Light Commercial CA08100002E—August 2015 www.eaton.com
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Loadcenters and Circuit Breakers
Type BR Loadcenters and Circuit Breakers
Approximate Dimensions in Inches (mm)
Commercial Loadcenter Knockouts
NEMA Type 1 Indoor Commercial Enclosures
Knockouts for Box Sizes 19, 20, 22, 24
NEMA Type 3R Outdoor Commercial Enclosures
Knockouts for Box Sizes 42, 43, 46, 47
Unit Enclosure Knockouts, Types ECB and ECC Knockouts
Indoor Commercial Enclosures
Outdoor Commercial Enclosures
Unit Enclosure Knockouts
Code Diameter
A 0.50 (12.7) — — —
B 0.50 (12.7) 0.75 (19.1) — —
C 0.75 (19.1) 1.00 (25.4) 1.50 (38.1) —
D 1.50 (38.1) 2.00 (50.8) 2.50 (63.5) 3.00 (76.2)
E 2.00 (50.8) 2.50 (63.5) 3.00 (76.2) —
F 2.50 (63.5) 3.00 (76.2) 3.50 (88.9) —
Code Diameter
A 0.50 (12.7) — — —
B 0.50 (12.7) 0.75 (19.1) — —
C 0.75 (19.1) 1.00 (25.4) 1.25 (31.8) —
D 1.50 (38.1) 2.00 (50.8) 2.50 (63.5) —
E 2.00 (50.8) 2.50 (63.5) 3.00 (76.2) —
F 2.50 (63.5) 3.00 (76.2) 3.50 (88.9) —
G 1.25 (31.8) 1.50 (38.1) 2.00 (50.8) 2.50 (63.5)
H 3.25 (82.6) Sq. — — —
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)
A
H
E
F
A
B B B
B B
C
D D D D
E
C
B
B
B
B
B
A
H
B B B
B B
C
E E E E
E
E
F
A
C
B
B
B
B
B
Box 19, 20
Box 22, 24
G
F
E E E
D D
C
B
B
B
B
B
A
HUB HUB
F
E
E E E
D D
C
B
B
B
B
B
A
HUB HUB
Box 42
Box 43, 46, 47
B
B
B
B
A
A
B
B
B
B
B
B
A
B B
HUB
NEMA Type 1—Indoor
NEMA Type 3R—Outdoor