AS/NZS 3008.1.2:2017

Table 28(1), 28(2)

Rating factors for depth of laying

The cable size and correction factors tools read the factor for how deep the cable is buried. It applies only to buried cables.

Verified: read against the printed standard, pages 89. Checked 24 Sept 2026.

Units: Depth m

These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.

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10 rows

Table 28(1), 28(2), Rating factors for depth of laying
Depth (m)	Buried direct up to 50	Buried direct 50 to 300	Buried direct over 300	Underground enclosure single core	Underground enclosure multicore	Factor
0.5	1	1	1	1	1	1
0.6	0.99	0.98	0.97	0.98	0.99	0.99
0.8	0.97	0.96	0.94	0.95	0.97	0.97
1	0.95	0.94	0.92	0.93	0.96	0.95
1.25	0.94	0.92	0.9	0.9	0.95	0.94
1.5	0.93	0.91	0.89	0.89	0.94	0.93
1.75	0.92	0.89	0.87	0.88	0.94	0.92
2	0.91	0.88	0.86	0.87	0.93	0.91
2.5	0.9	0.87	0.85	0.86	0.93	0.9
3	0.89	0.86	0.83	0.85	0.92	0.89

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