Installation in air

According to IEC 60287-2-1 Ed.2.0 for a single group of cables and IEC 60287-2-2 Ed.1.0 for more than one group of cables.

The wall clearance $e_{wall}$ is the distance between the closest cable to the wall and the object clearance $e_{hor}$ and $e_{ver}$ is the horizontal and vertical distance between two objects. Both values are relative to the outer diameter of the object.

There are discrepancies between the two standards IEC 60287-2-1 and -2-2, we use -2-1 when possible:

Symbol
$inst_{air}$
Choices
IdInstallationfactor Zfactor Efactor gwall clearanceobject clearanceInfo
11 single object0.213.940.600.30Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.3⋅D
22 objects touching, horizontal0.292.350.500.50Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D
32 objects spaced, horizontal0.213.940.600.50.75Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D, horizontal clearance 0.75⋅D
42 objects touching, vertical1.420.860.250.50Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D
52 objects spaced, vertical0.752.800.300.51.0Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D, vertical clearance 1.0⋅D
63 objects touching, horizontal0.621.950.250.50Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D
73 objects spaced, horizontal0.213.940.600.50.75Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D, horizontal clearance 0.75⋅D
83 objects touching, vertical1.610.420.201.00Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 1.0⋅D
93 objects spaced, vertical1.312.000.200.51.0Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D, vertical clearance 1.0⋅D
103 objects touching trefoil0.961.250.200.50Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥ 0.5⋅D
111 single object on wall1.690.630.2500Clipped direct to a vertical wall, D ≤ 0.08 m
123 objects in trefoil on wall0.940.790.2000Clipped direct to a vertical wall, D ≤ 0.08 m
13More than one group of cables0.961.250.20--The arrangement of more than one group of cables is limited to configurations in IEC 60287-2-2
14More than one multi-core cable0.213.940.60--The arrangement of more than one multi-core cable is limited to configurations in IEC 60287-2-2
Image
IEC standard 60287-2-1 Ed. 2.0 (2015) Table 2