|
Table 4.5 - Derating factors (Ci)
for cables up to 10mm² in cross-sectional area buried
in thermal insulation.
|
|
|
Length in insulation (mm)
|
Derating factor (Ci)
|
|
50
|
0.89
|
|
100
|
0.81
|
|
200
|
0.68
|
|
400
|
0.55
|
|
500 or more
|
0.50
|
Extracted from The Electricians Guide Fifth Edition
by John Whitfield
Published by EPA Press Click Here to order your Copy.