AS/NZS 3008.1.2:2017

Table 27(1), 27(2)

Rating factors for air and soil ambient temperature

The cable size and correction factors tools read the factor for the air or ground temperature on the route. A hot route lowers the current the cable can carry.

Verified: read against the printed standard, pages 88. Checked 24 Sept 2026.

Units: Temp °C

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

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Table 27(1), 27(2), Rating factors for air and soil ambient temperature
Insulation	Medium	Conductor temp C	Temp (°C)	Factor
PVC	air	75	15	1.18
PVC	air	75	20	1.12
PVC	air	75	25	1.06
PVC	air	75	30	1
PVC	air	75	35	0.94
PVC	air	75	40	0.88
PVC	air	75	45	0.8
PVC	air	75	50	0.72
PVC	air	75	55	0.63
PVC	air	75	60	0.53
PVC	air	75	65	0.43
PVC	air	75	70	0.32
XLPE	air	90	15	1.15
XLPE	air	90	20	1.09
XLPE	air	90	25	1.05
XLPE	air	90	30	1
XLPE	air	90	35	0.95
XLPE	air	90	40	0.91
XLPE	air	90	45	0.85
XLPE	air	90	50	0.8
XLPE	air	90	55	0.74
XLPE	air	90	60	0.66
XLPE	air	90	65	0.59
XLPE	air	90	70	0.52
XLPE	air	90	75	0.43
XLPE	air	90	80	0.31
XLPE	air	90	85	0.17
PVC	soil	75	10	1.04
PVC	soil	75	15	1
PVC	soil	75	20	0.95
PVC	soil	75	25	0.91
PVC	soil	75	30	0.86
PVC	soil	75	35	0.81
PVC	soil	75	40	0.75
XLPE	soil	90	10	1.04
XLPE	soil	90	15	1
XLPE	soil	90	20	0.96
XLPE	soil	90	25	0.93
XLPE	soil	90	30	0.91
XLPE	soil	90	35	0.87
XLPE	soil	90	40	0.83

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Table 27(1), 27(2)

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