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3

Technical Data 1156

Effective December

KNOCKOUT

LOCATION

1

KNOCKOUT

LOCATION

2

KNOCKOUT

LOCATION

KNOCKOUTS OMITTED

ON TOP ENDWALL OF

NEMA 3R ENCLOSURES

NEMA 1 and 3R enclosures dimensions - 30 to 100 amps - in (mm):

Conduit knockout quantity (size - inches)

NEMA

Type

Amps

Location 1

Location 2

3R

30/60A

5 (3/4, 1, 1 1/4)

2 (1/2, 3/4, 1, 1 1/4)

100A

5 (1 1/4, 1 1/2, 2)

2 (1 1/4, 1 1/2, 2)

1

30/60A

10 (1 1/4, 1 1/2, 2)

4 (1 1/4, 1 1/2, 2)

100A

10 (1 1/4, 1 1/2, 2)

4 (1 1/4, 1 1/2, 2)

NEMA type

Amps

A

B

C

D

E

F

G

H

J

k

L

M

N

3R

30/60A

7.75

(196.9)

2.44

(62.0)

8.12

(206.2)

16.27

(413.3)

14.25

(362.0)

3.66

(93.0)

6.5

(165.1)

0.56

(14.2)

1.38

(35.1)

–

(–)

1.44

(36.6)

–

(–)

15.81

(401.6)

100A

10.78

(273.8)

3.5

(88.9)

11.09

(281.7)

21.99

(558.5)

20.0

(508.0)

4.5

(114.3)

9.5

(241.3)

0.75

(18.8)

1.88

(47.8)

–

(–)

1.88

(47.8)

–

(–)

21.68

(550.7)

1

30/60A

7.75

(169.9)

2.44

(62.0)

8.06

(204.7)

16.00

(406.4)

14.25

(362.0)

3.66

(93.0)

6.5

(165.1)

0.56

(14.2)

1.38

(35.1)

1.38

(35.1)

1.44

(36.6)

1.44

(36.6)

15.81

(401.6)

100A

10.78

(273.8)

3.5

(88.9)

11.09

(281.7)

21.99

(558.5)

20.0

(508.0)

4.5

(114.3)

9.5

(241.3)

0.74

(18.8)

1.88

(47.8)

1.88

(47.8)

1.88

(47.8)

1.88

(47.8)

21.68

(550.7)

Knockout omitted on

top endwall of NEMA

3R enclosures

Knockout

location 1

tagential

knockouts

0.27 DIA MTG.

hole (3) REQD.

Knockout

location 2

concentric

knockouts

Knockout

location

0.88[22.4]

0.75

5.25 [133.3]

0.88 [22.4]

0.88 [22.4

]

9.89 [251.3]