Single Core Cables having PVC Insulation, Unarmoured, With or Without Sheath (Copper Conductor) 450/750V or 600/1000V|Fire resistant Multi Loose Tube Fiber Optic cables

Fire Resisting Cable

Fire Resistant Power & Control Cables

Fire Resistant Instrumention Cables

Fire Resistant Fire Alarm Cables

Current Rating and Voltage Drop

Single Core Cables having PVC Insulation, Unarmoured, With or Without Sheath (Copper Conductor)

450/750V or 600/1000V Current-Carrying Capacities (Amp) PVC & PVC/PVC Cables

		Reference Method 4 (Enclosed in conduit in thermally insulating wall etc)		Reference Method 3 (Enclosed in conduit on a wall or in trunking etc)		Reference Method 1 (Clipped direct)		Reference Method 11 (on a perforated cable tray horizontal or vertical)		Reference Method 12 (free air)
						Reference Method 1 (Clipped direct)				Horizontal flat spaced	Vertical flat spaced	Trefoil
Conductor cross-sectional area (mm²)		2 cables single-phase ac or dc (Amp)	3 or 4 cables 3-phase ac (Amp)	2 cables single-phase ac or dc (Amp)	3 or 4 cables 3-phase ac (Amp)	2 cables single-phase ac or dc (Amp)	3 or 4 cables 3-phase ac (Amp)	2 cables single-phase ac or dc or flat and touching (Amp)	3 cables 3-phase ac flat and touching (Amp)	2 cables single-phase ac or dc or 3 cables or trefoil (Amp)	2 cables single-phase ac or dc or 3 cables 3-phase ac (Amp)	3 cables trefoil 3-phase ac (Amp)
BS 6004	1	11	10.5	13.5	12	15.5	14	-	-	-	-	-
	1.5	14.5	13.5	17.5	15.5	20	18	-	-	-	-	-
	2.5	19.5	18	24	21	27	25	-	-	-	-	-
	4	26	24	32	28	37	33	-	-	-	-	-
	6	34	31	41	36	47	43	-	-	-	-	-
	10	46	42	57	50	65	59	-	-	-	-	-
	16	61	56	76	68	87	79	-	-	-	-	-
	25	80	73	101	89	114	104	126	112	146	130	110
	35	99	89	125	110	141	129	156	141	181	162	137
BS 6346	50	119	108	151	134	182	167	191	172	219	197	167
	70	151	136	192	171	234	214	246	223	281	254	216
	95	182	164	232	207	284	261	300	273	341	311	264
	120	210	188	269	239	330	303	349	318	396	362	308
	150	240	216	300	262	381	349	404	369	456	419	356
	185	273	245	341	296	436	400	463	424	521	480	409
	240	320	286	400	346	515	472	549	504	615	569	485
	300	367	328	458	394	594	545	635	584	709	659	561
	400	-	-	546	467	694	634	732	679	852	795	656
	500	-	-	626	533	792	723	835	778	982	920	749
	630	-	-	720	611	904	826	953	892	1138	1070	855
	800	-	-	-	-	1030	943	1086	1020	1265	1188	971
	1000	-	-	-	-	1154	1058	1216	1149	1420	1337	1079

*With or without protective conductor

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

Group Rating Factor please refer to Table G Voltage Drop (Per Amp Per Meter) PVC & PVC/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
Conductor cross-sectional area (mm²)	2 cables dc (mV/A/m)	Reference Methods 3 &4 (Enclosed in conduit etc in or on a wall) (mV/A/m)			Reference Methods 1 & 11 (Clipped direct or on trays, touching) (mV/A/m)			Reference Methods 12 (space*) (mV/A/m)			Reference Methods 3 &4 (Enclosed in conduit etc in or on a wall) (mV/A/m)			Reference Methods 1, 11 & 12 (in trefoil) (mV/A/m)			Reference Methods 1 & 11 (Flat touching) (mV/A/m)			Reference Methods 12 (Flat spaced*) (mV/A/m)
1	44	44			44			44			38			38			38			38
1.5	29	29			29			29			25			25			25			25
2.5	18	18			18			18			15			15			15			15
4	11	11			11			11			9.5			9.5			9.5			9.5
6	7.3	7.3			7.3			7.3			6.4			6.4			6.4			6.4
10	4.4	4.4			4.4			4.4			3.8			3.8			3.8			3.8
16	2.8	2.8			2.8			2.8			2.4			2.4			2.4			2.4
		r	x	z	r	x	z	r	x	z	r	x	Z	r	x	z	r	x	z	r	x	z
25	1.75	1.80	0.33	1.8	1.75	0.20	1.75	1.75	0.29	1.80	1.50	0.29	1.55	1.50	0.175	1.50	1.50	0.25	1.55	1.50	0.32	1.55
35	1.25	1.30	0.31	1.3	1.25	0.195	1.25	1.25	0.28	1.30	1.10	0.27	1.10	1.10	0.170	1.10	1.10	0.24	1.10	1.10	0.32	1.15
50	0.93	0.95	0.30	1.00	0.93	0.190	0.95	0.93	0.28	0.97	0.81	0.26	0.85	0.80	0.165	0.82	0.80	0.24	0.84	0.80	0.32	0.86
70	0.63	0.65	0.29	0.72	0.63	0.185	0.66	0.63	0.27	0.69	0.56	0.25	0.61	0.55	0.160	0.57	0.55	0.24	0.60	0.55	0.31	0.63
95	0.46	0.49	0.28	0.56	0.47	0.180	0.50	0.47	0.27	0.54	0.42	0.24	0.48	0.41	0.155	0.43	0.41	0.23	0.47	0.40	0.31	0.51
120	0.36	0.39	0.27	0.47	0.37	0.175	0.41	0.37	0.26	0.45	0.33	0.23	0.41	0.32	0.150	0.36	0.32	0.23	0.40	0.32	0.30	0.44
150	0.29	0.31	0.27	0.41	0.30	0.175	0.34	0.29	0.26	0.39	0.27	0.23	0.36	0.26	0.150	0.30	0.26	0.23	0.34	0.26	0.30	0.40

185	0.23	0.25	0.27	0.37	0.24	0.170	0.29	0.24	0.26	0.35	0.22	0.23	0.32	0.21	0.145	0.26	0.21	0.22	0.31	0.21	0.30	0.36
240	0.180	0.195	0.26	0.33	0.185	0.165	0.25	0.185	0.25	0.31	0.17	0.23	0.29	0.160	0.145	0.22	0.160	0.22	0.27	0.160	0.29	0.34
300	0.145	0.160	0.26	0.31	0.150	0.165	0.22	0.150	0.25	0.29	0.14	0.23	0.27	0.130	0.140	0.190	0.130	0.22	0.25	0.130	0.29	0.32
400	0.105	0.130	0.26	0.29	0.120	0.160	0.20	0.115	0.25	0.27	0.12	0.22	0.25	0.105	0.140	0.175	0.105	0.21	0.24	0.100	0.29	0.31
500	0.086	0.110	0.26	0.28	0.098	0.155	0.185	0.093	0.24	0.26	0.10	0.22	0.25	0.086	0.135	0.160	0.086	0.21	0.23	0.081	0.29	0.30
630	0.068	0.094	0.25	0.27	0.081	0.155	0.175	0.076	0.24	0.25	0.08	0.22	0.24	0.072	0.135	0.150	0.072	0.21	0.22	0.066	0.28	0.29
800	0.053	-	-	-	0.068	0.150	0.165	0.061	0.24	0.25	-	-	-	0.060	0.130	0.145	0.060	0.21	0.22	0.053	0.28	0.29
1000	0.042	-	-	-	0.059	0.150	0.160	0.050	0.24	0.24	-	-	-	0.052	0.130	0.140	0.052	0.20	0.21	0.044	0.28	0.28

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 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