In the world of cable ducts, there is a wide range of corrugated pipe diameters.
EN 61386 stipulates the dimensions of corrugated pipes: measurements, internal and external diameters. Cable manufacturers, on the other hand, define the length of coils and bars and their packaging.
Before proceeding with the purchase, the corrugated diameter for the electrical installation must be chosen.
Here are the diameters of the corrugated pipe divided according to structural strength characteristic.
Diameters of double-layer cable ducts 450 N
| OUTSIDE DIAMETER (OD) | INSIDE DIAMETER (ID) |
| (mm) | (mm) |
| 40 | 31 |
| 50 | 39 |
| 63 | 50 |
| 75 | 63 |
| 90 | 74 |
| 110 | 92 |
| 125 | 105 |
| 160 | 138 |
| 200 | 170 |
Sizes of 750 N ENEL cable duct
| OUTSIDE DIAMETER (OD) | INSIDE DIAMETER (ID) |
| (mm) | (mm) |
| 110 | 92 |
| 125 | 105 |
| 160 | 138 |
| 200 | 170 |
Cable duct dimensions 450 N TELECOM
| OUTSIDE DIAMETER (OD) | INSIDE DIAMETER (ID) |
| (mm) | (mm) |
| 50 | 39 |
| 63 | 50 |
| 125 | 105 |
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