Derating factor for laying depth

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Table 28(1): RATING FACTORS

SINGLE-CORE OR MULTICORE DEPTH OF LAYING BURIED DIRECT IN GROUND

Depth (m) Laid direct
Single-/Multi-core
0.50 1.00
0.60 0.98
0.80 0.96
1.00 0.94
1.25 0.92
1.50 0.91
1.75 0.89
2.00 0.88
2.50 0.87
3.00 0.86

Table 28(2): RATING FACTORS

SINGLE-CORE OR MULTICORE DEPTH OF LAYING IN UNDERGROUND WIRING ENCLOSURES

Depth (m) Laid in ducts
Single-core Multi-core
0.50 1.00 1.00
0.60 0.98 0.99
0.80 0.95 0.97
1.00 0.93 0.96
1.25 0.90 0.95
1.50 0.89 0.94
1.75 0.88 0.94
2.00 0.87 0.93
2.50 0.86 0.93
3.00 0.85 0.92

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