Siemens UL 1066 - Cubicle and Ventilation

5 – 4
5.1.3 Cubicle and ventilation
(1) Upper ventilation opening
(2) Insulating liner use NEMA GPO-3, min. 0.094“ thick or comparable material
(3) Lower ventilation opening
1) Cubicle height given for use with insulating liner on cubicle top or cradles equipped with optional cover
2) Provided by cradle holes
Frame
size
Frame
rating
(A)
Interrupting
Class
Minimal cubicle dimensions
Insulating liner
dimensions
Cubicle ventilation
Width W1
(inch)
Height H
(inch)
Depth D1
(inch)
Width W2
(inch)
Depth D2
(inch)
Top
(square
inch)
Bottom
(square
inch)
II
800
N, S, H, L 22 22.5
1)
19.5 18.5 10.5 not required1600
2000
3200 N, S, H, L 22 22.5
1)
19.5 18.5 10.5 55 55
2)
II Fused
800
F 22 22.5
1)
25 18.5 10.5 143 137
2)
1600
2000
III
4000
H, L 32 22.5
1)
19.5 28.5 10.5
48
(2 x 24)
88
2)
5000
3200
M 32 30 19.5 28.5 10.5
48
(2 x 24)
88
2)
4000
5000
III Fused
3200
F 32 22.5
1)
19.5 28.5 10.5 88 88
2)
4000
5000
II 4-pole
1600
N, S, H 32 22.5
1)
19.5 28.5 10.5
not required
2000
3200 55 55
2)
III 4-pole 5000 H, L 42 22.5
1)
19.5 39 10.5 48 (2 x 24) 88
2)
(1)
(2)
(3)