Current Rating And Voltage drop for cables & wires Upto and including 600/1000V
Two Core Aluminium, XLPE insulated Armoured / Unarmoured cables:

Nominal Area of Conductor	In Air		In Ground	In Duct	Voltage drop
Nominal Area of Conductor	Unarmoured	Armoured	Armoured	Armoured	Voltage drop
Sqmm	A		A	A	V/A/Km
1.5	22	22	25	21	-
2.5	29	29	35	28	-
4	37	37	44	63	19.0
6	48	48	55	46	11.8
10	65	65	76	61	7.9
16	98	89	105	86	4.8
25	110	110	134	108	3.10
35	135	135	160	131	2.23
50	163	163	191	156	1.65
70	209	209	234	191	1.15
95	257	257	280	231	0.84
120	287	287	301	262	0.67
150	328	328	344	289	0.55
185	376	376	394	331	0.45
240	444	444	459	380	0.35
300	499	499	509	420	0.30
400	573	573	556	480	0.25

Operating Conditions

Ambient Air temperature: 30°C
Ground Temperature: 20°C
Depth of Laying: 0.5 m
Thermal Resitivity of soil: 1.2 K.m/W