Product Overview

Nominal Minimum Weight Weight of Conduit
Nominal Outside Inside Per 100 Ft. (30.5m) with and Conductors
Conduit Size Diameter Diameter Couplings Attached Per 100 Ft. (30.5m)*
In. mm In. mm In. mm Lbs. kg Lbs. kg
3
/
8
”
(10)
0.675
(17.1)
0.493
(12.5)
51.5
(23.4)
65.1
(29.5)
1
/
2
”
(15)
0.840
(21.3)
0.632
(16.0)
79.0
(35.8)
101.1
(45.9)
3
/
4
”
(20)
1.050
(26.7)
0.836
(21.3)
105.0
(47.6)
145.8
(66.1)
1”
(25)
1.315
(33.4)
1.063
(27.0)
153.0
(69.4)
219.3
(99.5)
1
1
/
4
”
(32)
1.660
(42.2)
1.394
(35.4)
201.0
(91.2)
318.3
(144.4)
1
1
/
2
”
(40)
1.900
(48.3)
1.624
(41.3)
249.0
(113.0)
408.8
(185.4)
2”
(50)
2.375
(60.3)
2.083
(52.9)
332.0
(150.6)
593.8
(269.3)
2
1
/
2
”
(65)
2.875
(73.0)
2.489
(63.2)
527.0
(239.1)
901.0
(408.7)
3”
(80)
3.500
(88.9)
3.090
(78.5)
682.6
(309.6)
1259.0
(571.1)
3
1
/
2
”
(90)
4.000
(101.6)
3.570
(90.7)
831.0
(376.9)
1604.0
(727.6)
4”
(100)
4.500
(114.3)
4.050
(102.9)
972.3
(441.0)
1967.0
(892.2)
5”
(125)
5.563
(141.3)
5.073
(128.9)
1313.6
(595.9)
2876.0
(1304.5)
6”
(150)
6.625
(168.3)
6.093
(154.8)
1745.3
(791.7)
4003.0
(1815.7)
RIGID STEEL CONDUIT (HEAVY WALL CONDUIT)
INTERMEDIATE METAL CONDUIT (IMC)
NEC TABLE 346-12
Nominal Minimum Weight Weight of Conduit
Nominal Outside Inside Per 100 Ft. (30.5m) with and Conductors
Conduit Size Diameter Diameter Couplings Attached Per 100 Ft. (30.5m)*
In. mm In. mm In. mm Lbs. kg Lbs. kg
1
/
2
”
(15)
0.815
(20.7)
.675
(17.1)
60.0
(27.2)
82.1
(37.2)
3
/
4
”
(20)
1.029
(26.1)
.879
(22.3)
82.0
(37.2)
122.8
(55.7)
1”
(25)
1.290
(32.7)
1.120
(28.4)
116.0
(52.6)
182.3
(82.7)
1
1
/
4
”
(32)
1.638
(41.6)
1.468
(37.3)
150.0
(68.0)
267.3
(121.2)
1
1
/
2
”
(40)
1.883
(47.7)
1.703
(43.3)
182.0
(82.5)
341.8
(155.0)
2”
(50)
2.360
(59.9)
2.170
(55.1)
242.0
(109.7)
503.8
(228.5)
2
1
/
2
”
(65)
2.857
(72.5)
2.597
(66.0)
428.0
(194.1)
775.0
(351.5)
3”
(80)
3.476
(88.3)
3.216
(81.7)
526.0
(238.6)
1069.0
(485.0)
3
1
/
2
”
(90)
3.971
(100.8)
3.71
1
(94.3)
612.0
(277.6)
1346.0
(610.8)
4”
(100)
4.466
(113.4)
4.206
(106.8)
682.0
(309.4)
1632.0
(740.5)
*Conduit plus weight of heaviest conductor combination as specified by the National Electrical Code.
Rigid and Intermediate Metal Conduit shall be supported at least every 10 feet (3.05 m) and within 3 feet (914 mm) of each
outlet box, junction box, cabinet, or fitting, except for straight runs of conduit connected with couplings which may be
supported in accordance with NEC Article 345 and 346, provided such supports prevent transmission of stresses to
termination where conduit is deflected between supports.
Dimensions taken from ANSI C80.1-1977.
*Conduit plus weight of heaviest conductor combination as specified by the National Electrical Code.
Conduit Size
Maximum Suppor
t Span
In. mm Feet Meters
1
/
2
-
3
/
4
(15-20)
10
(3.05)
1
(25)
12
(3.66)
1
1
/
4
-1
1
/
2
(32-40)
14
(4.27)
2-2
1
/
2
(50-65)
16
(4.88)
3-6
(80-150)
20
(6.10)
Reference Data
Reference Data
233