Intermediate Metal Conduit (IMC) Steel Elbows Conforms With:
- ANSI - American National Standard for Electrical Intermediate Metal Conduit (EIMC) ANSI, C80.6
- UL Standard for Electrical Intermediate Metal Conduit - Steel, UL 1242
- National Electrical Code 2008 Article 342
- Federal Specification WW-C-581 (Class 2 Type A)
Intermediate Metal Conduit (RMC) Steel Elbows:
- Permitted under all atmospheric conditions and occupancies
- Shall be permitted to be installed in concrete, in direct contact with the earth
- Permitted in areas of severe corrosive influences where protected by corrosion protection and judged suitable for the condition
- Permitted in our under cinder fill where subject to permenent moisture when protected on all sides by a layer of noncinder concrete not less than 2 in. (50 mm) thick or with corrosion protection judged suitable for the condition
- May be used with Aluminum fittings and enclosures
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| Intermediate Metal Conduit (IMC) Dimensions | ||||
| Trade Size | Metric Designator | Nominal Outside Diameter | Nominal Inside Diameter | Wall |
| 1/2 | 16 | .815 | .660 | .078 |
| 3/4 | 21 | 1.029 | .864 | .083 |
| 1 | 27 | 1.290 | 1.105 | .093 |
| 11/4 | 35 | 1.638 | 1.488 | .095 |
| 11/2 | 41 | 1.883 | 1.683 | .100 |
| 2 | 53 | 2.360 | 2.150 | .105 |
| 21/2 | 63 | 2.857 | 2.557 | .150 |
| 3 | 78 | 3.476 | 3.176 | .150 |
| 31/2 | 91 | 3.971 | 3.671 | .150 |
| 4 | 103 | 4.466 | 4.166 | .15 |
- Figures are the average of the maximum and minimum dimensions as given in UL 1242
- Calculated from nominal outside diameter and wall thickness
| Dimensions of Special Large Radius 90 Degree Elbows | ||||||||
| Trade Size | 1" - 21/2 | 1" - 3" | 1" - 4" | 1" - 4" | 1" - 5" | 1" - 6" | 1" - 6" | 1" - 6" |
| When Radius "A" is | 12" | 15" | 18" | 24" | 30 | 36" | 42" | 48" |
| Offset "C" is | 1'9" | 2'0" | 2'4" | 2'11" | 3'5" | 3'11" | 4'6" | 5'0" |
| Straight End "D" is | 9" | 9" | 10" | 11" | 11" | 11" | 12" | 12" |
| Leg Unbent is | 3'0" | 3'6" | 4'0" | 4'11" | 5'9" | 6'6" | 7'6" | 8'4" |