Single Core Cables having PVC Insulation, Armoured (Copper Conductor) 600/1000V|fire resisting cables

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Single Core Cables having PVC Insulation, Armoured (Copper Conductor) 600/1000V

Current-Carrying Capacities (Amp) PVC /AWA/PVC Cables

Conductor cross-sectional area (mm²)	Reference Method 1 (Clipped direct)		Reference Method 11 (on perforated cable tray)		Reference Method 12 (free air)					Direct in Ground		In Single Way Ducts
	Reference Method 1 (Clipped direct)		Reference Method 11 (on perforated cable tray)		3 or 4 cables 3-phase ac			2 cables dc spaced		Direct in Ground		In Single Way Ducts
	2 cables single-phase ac or dc (Amp)	3 or 4 cables 3-phase ac (Amp)	2 cables single-phase ac flat & touching (Amp)	3 or 4 cables 3-phase ac flat & touching (Amp)	Horizontal flat spaced (Amp)	Vertical flat spaced (Amp)	3 cables trefoils (Amp)	Horizontal (Amp)	Vertical (Amp)	2 cables flat touching (Amp)	3 cables trefoil touching (Amp)		2 cables duct touching (Amp)	3 cables trefoil touching (Amp)
50	193	179	205	189	230	212	181	229	216	238	203		216	199
70	245	225	259	238	286	263	231	294	279	292	248		262	241
95	296	269	313	285	338	313	280	357	340	349	297		308	282
120	342	309	360	327	385	357	324	415	396	396	337		341	311
150	393	352	413	373	436	405	373	479	458	443	376		375	342
185	447	399	469	422	490	456	425	548	525	497	423		414	375
240	525	465	550	492	566	528	501	648	622	571	485		463	419
300	594	515	624	547	616	578	567	748	719	640	542		509	459
400	687	575	723	618	674	632	657	885	851	708	600		545	489
500	763	622	805	673	721	676	731	1035	997	780	660		585	523
630	843	669	891	728	771	723	809	1218	1174	856	721		632	563
800	919	710	976	777	824	772	886	1441	1390	895	756		662	587
1000	975	737	1041	808	872	816	945	1685	1627	939	797		703	621

Note: Rating factors for ambient temperature other than 30℃ please refer Table A

Rating factors for ground temperature other than 15℃ please refer Table B

Group Rating Factor please refer to Table F & Table G

Voltage Drop (Per Amp Per Meter) PVC/AWA/PVC Cables

Conductor cross-sectional area (mm²)	2 cables dc (mV/A/m)	2 cables-single-phase ac						3 or 4 cables-three-phase ac									Direct in Ground		Single Way Ducts
		Reference Methods 1 & 11 (Touching) (mV/A/m)			Reference Methods 12 (space*) (mV/A/m)			Reference Methods 1, 11 & 12 (in trefoil touching) (mV/A/m)			Reference Methods 1 & 11 (Flat touching) (mV/A/m)			Reference Methods 12 (Flat spaced*) (mV/A/m)			2 cables flat touching (mV/A/m)	3 cables trefoil touching (mV/A/m)	2 cables flat touching (mV/A/m)	3 cables trefoil touching (mV/A/m)
		r	x	z	r	x	z	r	x	z	r	x	Z	r	x	z	2 cables flat touching (mV/A/m)	3 cables trefoil touching (mV/A/m)	2 cables flat touching (mV/A/m)	3 cables trefoil touching (mV/A/m)
50	0.93	0.93	0.22	0.95	0.92	0.30	0.97	0.80	0.19	0.82	0.79	0.26	0.84	0.79	0.34	0.86	0.97	0.82	1.00	0.88
70	0.63	0.64	0.21	0.68	0.66	0.29	0.72	0.56	0.18	0.58	0.57	0.25	0.62	0.59	0.32	0.68	0.67	0.58	0.76	0.66
95	0.46	0.48	0.20	0.52	0.51	0.28	0.58	0.42	0.175	0.45	0.44	0.25	0.50	0.47	0.31	0.57	0.50	0.44	0.61	0.53
120	0.36	0.39	0.195	0.43	0.42	0.28	0.50	0.33	0.17	0.37	0.36	0.24	0.43	0.40	0.30	0.50	0.42	0.36	0.54	0.47
150	0.29	0.31	0.19	0.37	0.34	0.27	0.44	0.27	0.165	0.32	0.30	0.24	0.38	0.34	0.30	0.45	0.36	0.31	0.48	0.42
185	0.23	0.26	0.19	0.32	0.29	0.27	0.39	0.22	0.16	0.27	0.25	0.23	0.34	0.29	0.29	0.41	0.31	0.27	0.44	0.38
240	0.180	0.20	0.180	0.27	0.23	0.26	0.35	0.175	0.160	0.23	0.20	0.23	0.30	0.24	0.28	0.37	0.26	0.23	0.40	0.34
300	0.145	0.160	0.180	0.24	0.190	0.26	0.32	0.140	0.155	0.21	0.165	0.22	0.28	0.20	0.28	0.34	0.23	0.20	0.37	0.32
400	0.105	0.140	0.175	0.22	0.180	0.24	0.30	0.120	0.130	0.195	0.160	0.21	0.26	0.21	0.25	0.32	0.22	0.19	0.34	0.30
500	0.086	0.120	0.170	0.21	0.165	0.23	0.29	0.105	0.145	0.180	0.145	0.20	0.25	0.190	0.24	0.30	0.20	0.18	0.32	0.28
630	0.068	0.105	0.165	0.195	0.150	0.22	0.27	0.091	0.145	0.170	0.135	0.195	0.23	0.175	0.22	0.28	0.19	0.16	0.30	0.26
800	0.053	0.094	0.160	0.185	0.145	0.21	0.25	0.082	0.140	0.160	0.125	0.180	0.22	0.170	0.195	0.26	-	-	-	-
1000	0.042	0.095	0.155	0.185	0.140	0.190	0.24	0.079	0.135	0.155	0.125	0.165	0.21	0.165	0.170	0.24	-	-	-	-

Note: r=conductor resistance at operating temperature

Z=impedance, x=reactance

Table A: Rating Factors for Other Ambient Air Temperatures (PVC Insulated)

Ambient Temperature	25℃	30℃	35℃	40℃	45℃	50℃	55℃	60℃	65℃	70℃
Rating Factor	1.03	1.00	0.94	0.87	0.79	0.71	0.61	0.50	0.35	-

Table B: Rating Factors for Other Ground Temperatures (PVC Insulated)

Ground Temperature	10℃	15℃	20℃	25℃	30℃	35℃	40℃	45℃	50℃
Rating Factor	1.04	1.00	0.95	0.90	0.85	0.80	0.73	0.67	0.60

Table F: Group Rating Factors for Cables Installation

Group Rating Factors			Number of Circuits
Group Rating Factors			2	3	4	5	6	7	8	9	10	11	12
1	For circuits of 2 Single core cables laid flat touching horizontal formation, laid direct in ground		0.79	0.68	0.62	0.57	0.54	0.52	0.50	0.48	0.47	0.46	0.45
2	For circuits of 3 Single core cables in trefoil touching, laid direct in ground		0.78	0.66	0.61	0.56	0.53	0.50	0.49	0.47	0.46	0.44	0.43
			Number of Cables in a Group
			2	3	4	5	6	7	8	9	10	11	12
3	For twin or multi-cores cables in horizontal formation, laid direct in ground	Spaced 0.15m	0.87	0.78	0.74	0.70	0.68	0.66	0.64	0.63	0.62	0.61	0.60
3		Spaced 0.30m	0.91	0.84	0.81	0.78	0.77	0.75	0.75	0.74	0.73	0.73	0.72
			Number of Ducts in a Group
			2	3	4	5	6	7	8	9	10	11	12
4	For twin or multi-cores cables in single-way ducts horizontal formation spaced 0.30m apart		0.93	0.88	0.85	0.83	0.82	0.81	0.80	0.79	0.79	0.78	0.78

Table G Correction Factors for Groups of More than One Circuit of Single Core Cables, or More than One Multi-Cores Cable

Reference Methods of Installation		Correction Factor (Cg)
		Number of Circuits or Multi-cores Cables
		2	3	4	5	6	7	8	9	10	12	14	16	18	20
Enclosed (Method 3 or 4) or bunched and clipped direct to a non-metallic surface (Method 1)		0.80	0.70	0.65	0.60	0.57	0.54	0.52	0.50	0.48	0.45	0.43	0.41	0.39	0.38
Single layer clipped to a non-metallic surface (Method 1)	Touching	0.85	0.79	0.75	0.73	0.72	0.72	0.71	0.70	-	-	-	-	-	-
Single layer clipped to a non-metallic surface (Method 1)	Spaced*	0.94	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90
Single layer multi-cores on a perforated metal cable tray, vertical or horizontal(Method 11)	Touching	0.86	0.81	0.77	0.75	0.74	0.73	0.73	0.72	0.71	0.70	-	-	-	-
	Spaced*	0.91	0.89	0.88	0.87	0.87	-	-	-	-	-	-	-	-	-
Single layer single core on a perforated metal cable tray, touching (Method 11)	Horizontal	0.90	0.85	-	-	-	-	-	-	-	-	-	-	-	-
	Vertical	0.85	-	-	-	-	-	-	-	-	-	-	-	-	-
Single layer multi-cores touching on ladder supports (Method 13)		0.86	0.82	0.80	0.79	0.78	0.78	0.78	0.77	-	-	-	-	-	-

*Space means a clearance between adjacent surfaces of at least one cable diameter (De). Where the horizontal clearance between adjacent cables exceeds 2 De, no correction factor need be applied.

Note:

The factors in the table are applicable to group of cables all of one size. The value of current derived from application of the appropriate factors is the maximum continuous current to be carried by any of the cables in the group.
If, due to known operating conditions, a cable is expected to carry not more than 30% of it’s grouped rating, it may be ignored for the purpose of obtaining the rating factor for the rest of the group.
For example, a group of N loaded cables would normally require a group reduction factor of Cg applied to the tabulated It. However, if M cables in the group carry loads which are not greater than 0.3CgIt amperes, the other cables can be sized by using the group rating factor corresponding to (N-M) cables.
Factors are given for single layer of cables do not apply when cables are installed in more than one layer touching each other.
For circuits having more than one cable in parallel per phase, each set of three conductors should be considered as a circuit for the purpose of this table.

Fire Resisting Cables

Current Rating and Voltage Drop