According to IEC 60287-2-1 Ed.2.0 for a single group of cables, reduced to cases of IEC 60287-2-3.

Symbol
$inst_{\mathrm{t}}$
Unit
-
Related
$F_{\mathrm{m}}$
$K_{\mathrm{cv}}$
Choices
IdInstallationfactor Zfactor Efactor gInfo
11 single cable/gil0.213.940.60Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.3 x D.
22 cables/gil touching, horizontal0.292.350.50Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.5 x D.
32 cables/gil spaced, horizontal (clearance >0.75 x D)0.213.940.60Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.3 x D, horizontal clearance ≥0.75 x D.
42 cables/gil touching, vertical1.420.860.25Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.5 x D.
52 cables/gil spaced, vertical (clearance >D)0.752.800.30Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.5 x D, vertical clearance ≥D.
63 cables/gil touching, horizontal0.621.950.25Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.5 x D.
73 cables/gil spaced, horizontal (clearance >0.75 x D)0.213.940.60Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.3 x D, horizontal clearance ≥0.75 x D.
83 cables/gil touching, vertical1.610.420.20Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥1.0 x D,
93 cables/gil spaced, vertical (clearance >D)1.312.000.20Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.5 x D, vertical clearance ≥D.
103 cables/gil touching trefoil0.961.250.20Installation on non-continuous brackets, ladder supports or cleats, clearance to wall ≥0.5 x D.