HUBBELL ELECTRICAL PRODUCTS
A Division of HUBBELL INCORPORATED (Delaware)
3940 Dr. Martin Luther King Drive
St. Louis, Missouri 63113 USA
INSTALLATION, OPERATION &
MAINTENANCE DATA SHEET
SERIES USF JUNCTION BOXES
Increased Safety Terminal Enclosures For Use In
Zone Classified Hazardous Locations
P/N KIL00921445 FORM NO. K1445 R6/18 ECO-2-045-18
Page 7 of
10
TABLE 1 - Minimum Distance - From Edge of Enclosure to Center of Conduit / Cable Entry
TABLE 2 - Minimum Distance - From Edge of Gland Plate to Center of Conduit / Cable Entry
TABLE 3 - CEC / NEC Minimum Wire Bending Space - From Inside Wall of Enclosure (
North America Applications Only
)
TABLE 4 - Conduit / Cable Gland Hole Diameters - For additional sizes, please contact Customer Service
TABLE 5 - Minimum Distance - From Center Line to Center Line of Conduit / Cable Entries
NPT
(Metric)
4"
3-1/2"
3" (M75)
2-1/2"
(M63)
2" (M50)
1-1/2" (
M40)
1-1/4"
(M32)
1" (M25)
3/4"
(M20)
1/2"
(M16)
IN. (mm)
2-3/4 (70)
2-1/2 (64)
2 (51)
2 (51)
1-5/8
(41)
1-3/8 (35)
1-1/4
(32)
1 (25)
7/8 (22)
3/4 (19)
NPT
(Metric)
4"
3-1/2"
3" (M75)
2-1/2"
(M63)
2" (M50) 1-1/2" (M40)
1-1/4"
(M32)
1" (M25)
3/4"
(M20)
1/2"
(M16)
IN. (mm)
3-1/4 (83)
3 (76)
2-3/4 (70)
2-1/2 (64)
2-1/8
(54)
1-7/8 (48)
1-3/4
(44)
1-1/2
(38)
1-3/8 (35)
1-1/4
(32)
Size
AWG
(mm2)
16 (1.5)
14 (2.5)
12 (4)
10 (6)
8 (10)
6 (16)
4 (25)
2 (35)
1/0 (50) 2/0 (70) 3/0 (95)
4/0
(120)
IN.
(mm)
1.5 (38)
1.5 (38)
1.5 (38)
1.5 (38)
1.5 (38)
2 (51)
3 (76)
3.5 (89)
5.5
(140)
6 (152)
6.5
(164)
7 (178)
NPT
4"
3-1/2"
3"
2-1/2"
2"
1-1/2
1-1/4"
1"
3/4"
1/2"
Max. Hole
Dia. IN. (mm)
4.53
(115.06)
4.03
(102.36)
3.53
(89.66)
2.905
(73.79)
2.405
(61.08)
1.93
(49.2)
1.69
(42.93)
1.345
(34.16)
1.08 (27.4)
.87
(22.09)
Metric
M100
M80
M75
M63
M50
M40
M32
M25
M20
M16
Max. Hole
Dia. mm (IN.)
100.7
(3.94)
80.7
(3.15)
75.7
(2.95)
63.7
(2.48)
50.7
(1.97)
40.7
(1.58)
32.7
(1.26)
25.7
(0.98)
20.7 (0.79)
16.7
(0.63)
