Electrical Metallic Tubing — (EMT)

Electrical Metallic Tubing (EMT), also commonly called thin-wall, is a listed steel raceway of circular cross section which is unthreaded, and nominally 10 feet long. Twenty foot lengths are also available. Covered by Article 358 of the NEC®, EMT is available in trade sizes 1/2 through 4. The outside is galvanized for corrosion protection and the inside has an approved corrosion resistant organic coating. EMT is installed by use of set-screw or compression-type couplings and connectors. It is permitted to have an integral coupling which is comprised of an expanded, "belled" shape of tube on one end with set screws. EMT with integral couplings is available in trade sizes 2 through 4.

 
 

 

  
 

Electrical Metallic Tubing (EMT) - Weights and Dimensions

Trade
Size
Designator
Nominal Wt.
Per 100 Ft.
(30.5M)
Nominal
Outside
Diameter
Nominal
Wall
Thickness
Quantity
In Primary
Bundle
Master Bundles
Quantity
Approx. Wt.
Volume
U.S.
Metric
lb.
kg
in.
mm
in.
mm
ft.
m
ft.
mm
lb.
kg
cu ft
cu m
1/2
16
30
13.6
0.706
17.9
0.042
1.07
100
30.5
7000
2135.0
2100
952.4
28.7
0.81
3/4
21
46
20.9
0.922
23.4
0.049
1.25
100
30.5
5000
1525.0
2300
1043.1
35.6
1.01
1
27
67
30.4
1.163
29.5
0.057
1.45
100
30.5
3000
915.0
2010
911.6
33.7
0.95
1-1/4
35
101
45.8
1.510
38.4
0.065
1.65
50
15.2
2000
610.0
2020
916.1
35.0
0.99
1-1/2
41
116
52.6
1.740
44.2
0.065
1.65
50
15.2
1500
457.5
1740
789.1
34.2
0.97
2
53
148
67.1
2.197
55.8
0.065
1.65
-
-
1200
366.0
1776
805.4
46.7
1.32
2-1/2
63
216
98.0
2.875
73.0
0.072
1.83
-
-
610
186.1
1318
597.7
41.5
1.18
3
78
263
119.3
3.500
88.9
0.072
1.83
-
-
510
155.6
1341
608.2
48.9
1.38
3-1/2
91
349
158.3
4.000
101.6
0.083
2.11
-
-
370
112.9
1291
585.5
48.6
1.38
4
103
393
178.2
4.500
114.3
0.083
2.11
-
-
300
91.5
1179
534.7
48.3
1.37
     
 

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