Rigid Metal Conduit (RMC) Steel Elbows Conforms With:
- ANSI - American National Standard for Electrical Rigid Steel Conduit (ERSC) ANSI, C80.1
- UL Standard for Electrical Rigid Metal Conduit - Steel, UL 6
- National Electrical Code 2008 Article 344
- Federal Inspection WW-C-581 (Class 1 Type A)
- ANSI/ASME B.1.20.1-1983, Standard for Pipe Threads, General Purpose (Inch)
- Rigid Metal Conduit Elbows are Hot-Dip Glvanized
Rigid 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 or under cinder fill where subject to permanent moisture when protected on all sides by a layer of noncinder concrete no less than 2 in. (50 mm) thick or with corrosion protection judged suitable for the condition
- May be used with Aluminum fitting and enclosures
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| Rigid Metal Conduit (RMC) Dimensions | ||||
| Trade Size | Metric Designator | Outside Diameter | Inside Diameter | Wall |
| 1/2 | 16 | .840 | .632 | .104 |
| 3/4 | 21 | 1.050 | .836 | .107 |
| 1 | 27 | 1.315 | 1.049 | .133 |
| 11/4 | 35 | 1.660 | 1.380 | .140 |
| 11/2 | 41 | 1.900 | 1.610 | .145 |
| 2 | 53 | 2.375 | 2.067 | .154 |
| 21/2 | 63 | 2.875 | 2.469 | .203 |
| 3 | 78 | 3.500 | 3.068 | .216 |
| 31/2 | 91 | 4.000 | 3.548 | .266 |
| 4 | 103 | 4.500 | 4.026 | .237 |
| 5 | 129 | 5.563 | 5.047 | .258 |
| 6 | 155 | 6.625 | 6.065 | .280 |
Notes: For information only, not a URL 6 Requirement
| 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" |