Power Cable-Technical Details

Multicore armoured PVC insulated cables current rating

 

 

CURRENT CARRYING CAPACITY (Amperes): Ambient temperature: 30^oC

                                                                                       Conductor operating temperature: 70^oC

 

APPENDIX 3

Table 3(a) 

Conductor Cross-Sectional Area	Open and clipped direct:		On a perforated cable tray horizontal or Vertical
	1 two-core cable single-phase a.c. or d.c	1 three or four-core cable, three-phase a.c.	1 two-core cable single-phase a.c. or d.c	1 threeor four-core cable tray, or reference Method 13(fee air)
mm2	A	A	A	A
1.5	21	18	22	19
2.5	28	25	31	26
4	38	33	41	35
6	49	42	53	45
10	67	58	72	62
16	89	77	97	83
25	118	102	128	110
35	145	125	157	135
50	175	151	190	163
70	222	192	241	207
95	269	231	291	251
120	310	267	336	290
150	356	306	386	332
185	405	348	439	378
240	476	409	516	445
300	547	469	592	510
400	621	540	683	590

 

VOLTAGE DROP (millvolt per amperes per metre):Conductor operating temperature: 70^oC

Table 3(b) 

Conductor Cross-Sectional Area	Two-core cable d.c.	Two core cable single phase a.c.			Three or four-core cable three-phase a.c.
mm2	mV/A/m	mV/A/m			mV/A/m
1.5	29	29			25
2.5	18	18			15
4	11	11			9.5
6	7.3	7.3			6.4
10	4.4	4.4			3.8
16	2.8	2.8			2.4
		r	x	Z	r	x	Z
25	1.75	1.75	0.170	1.75	1.50	0.145	1.50
35	1.25	1.25	0.165	1.25	1.10	0.145	1.10
50	0.93	0.93	0.165	0.94	0.80	0.140	0.81
70	0.63	0.63	0.160	0.65	0.55	0.140	0.57
95	0.46	0.47	0.155	0.50	0.41	0.140	0.43
120	0.36	0.38	0.155	0.41	0.33	0.135	0.35
150	0.29	0.30	0.155	0.34	0.26	0.135	0.29
185	0.23	0.25	0.150	0.29	0.21	0.130	0.25
240	0.180	0.190	0.150	0.24	0.165	0.130	0.21
300	0.145	0.155	0.145	0.21	0.135	0.130	0.185
400	0.105	0.115	0.145	0.185	0.100	0.125	0.160

 Note:The above current carrying capacities are for reference only, the current carrying capacities may be varied for different installation conditions