MINING CABLES

INSULATION THICKNESS

Normal Area Of Conductor	Nominal Thickness of Insulation For Power Cores
	1.1KV	3.3 KV	3.8/6.6 KV	6.35/11 KV
mm²	mm	mm	mm	mm
2.5	1.0	-	---	---
4	1.0	-	---	---
6	1.0	-	---	---
10	1.2	-	---	---
16	1.2	2.2	---	---
25	1.4	2.2	3.0	4.0
35	1.4	2.2	3.0	4.0
50	1.6	2.2	3.0	4.0
70	1.6	2.2	3.0	4.0
95	1.8	2.4	3.0	4.0
120	1.8	2.4	3.0	4.0
150	2.0	2.4	3.0	4.0
185	2.2	2.4	3.0	4.0
240	2.4	2.4	3.0	4.0
300	2.6	2.6	3.0	4.0

Thickness of Inner and Outer Shealth Except Where Otherwise Specified (For Collective Metallic Screened and Pliable Wire Armoured Cables)

Calculate Diameter Under Inner Sheath		Minimum Thickness Of Inner Sheath	Nominal Thickness Of Outer Sheath
Over	Up to and including
mm	mm	mm	mm
---	10	1.4	2.0
10	15	1.6	2.4
15	20	1.8	2.6
20	25	2.0	2.8
25	30	2.2	3.0
30	40	2.4	3.2
40	50	2.8	3.6
50	60	3.2	4.0
60	70	3.6	4.5
70	80	4.0	5.0
80	---	4.4	5.5

Dimension of Pliable Wire Armour

Calculated Diameter Under Armour		Size Of Armour Strand
Above mm	Up to and including mm	Number /mm
---	25	7/0.45
25	40	7/0.70
40	60	7/0.90
60	---	7/1.25

Thickness of Inner and Outer Sheath Except Where Otherwise Specified (Except for Collective Metallic Screened and Pliable Wire Armoured Cables)

Calculate Diameter Under Inner Sheath And Under Outer Sheath		Minimum Thickness Of Inner Sheath	Nominal Thickness Of Outer Sheath
Over	Up to and including
mm	mm	mm	mm
---	10	1.6	2.5
10	15	1.8	2.8
15	20	2.0	3.2
20	25	2.2	3.6
25	30	2.4	4.0
30	40	2.6	4.5
40	50	3.0	5.0
50	60	3.5	5.7
60	70	4.0	6.4
70	80	4.5	7.1
80	90	5.0	7.8
90	100	5.5	8.5
100	---	6.0	9.0

SIZE of Power, Earthing and Pilot conductors Except where Otherwise Specified

Power Conductor	Earthing Conductor	Earthing Conductor	Pilot Conductor
	Type-A	Type-B
mm²	mm²	mm²	mm²
2.5	2.5	2.5	2.5
4	4	4	4
6	6	6	6
10	10	10	10
16	16	16	16
25	16	25	16
35	16	35	16
50	25	50	25
70	35	70	35
95	50	95	50
120	70	120	70
150	70	150	70
185	95	185	95
240	120	240	120
300	150	300	150