AS/NZS 3000:2018

Table 3.6

Underground wiring systems minimum depth of cover

The underground cable tool reads the minimum depth of cover for the category and the location.

Verified: read against the printed standard, pages 197. Checked 26 Sept 2026.

Units: Cat A mm, Cat B mm, Cat C mm

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

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4 rows

Table 3.6, Underground wiring systems minimum depth of cover
Location	Covering	Cat A (mm)	Cat B (mm)	Cat C (mm)
within-building	concrete-75	0	0	0
within-building	none	500	500	50
elsewhere	concrete-75	300	300	50
elsewhere	none	500	500	50

Tools that read it (1)