Technical Resources

We have gathered together a number of technical resources for use as reference on electrical projects.

DISCLAIMER: The information on this page and the PDF is for information only and R&M Electrical Group Ltd can not be held liable for any information therein.

Cable: PVC Singles

Download as PDF

PVC Singles 6491X to bs6004

Table 4D1A – Single core

70ºC thermoplastic insulated cables, nonarmoured, with or without sheath (copper conductors)

Conductor cross-sectioal area	Reference Method A (enclosed in conduit in thermally insulating wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc)		Reference Method C (clipped direct)		Reference Method F (in free air or on a perforated cable tray, horizontal or vertical)
							Touching			Spaced by one diameter
	2 cables, single-phase A.C or D.C	3 or 4 cables, three -phase A.C	2 cables, single-phase A.C or D.C	3 or 4 cables, three -phase AC	2 cables, single-phase AC or D.C flat & touching	3 or 4 cables, threephase A.C flat & touching or trefoil	2 cables, single-phase AC or D.C flat	3 cables, three -phase AC flat	3 cables, three -phase AC trefoil	2 Cables, single-phase A.C or D.C or 3 cables three-phase A.C. flat
mm2	A	A	A	A	A	A	A	A	A	A	A
1.5	14.5	13.5	17.5	15.5	20	18	-	-	-	-	-
2.5	20	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	131	114	110	146	130
35	99	89	125	110	141	129	162	143	137	181	162
50	119	108	151	134	182	167	196	174	167	219	197
70	151	136	192	171	234	214	251	225	216	281	254
95	182	164	232	207	284	261	304	275	264	341	311
120	210	188	269	239	330	303	352	321	308	396	362
150	240	216	300	262	381	349	406	372	356	456	419
185	273	245	341	296	436	400	463	427	409	521	480
240	320	286	400	346	515	472	546	507	485	615	569
300	367	328	458	394	594	545	629	587	561	709	659
400	-	-	546	467	694	634	754	689	656	852	795

Table 4D1B

Conductor operating temperature: 70°C
Voltage drop (millivolts per ampere per metre)

Conductor cross-sectional area	2 cables D.C.	2 cables - single phase A.C. Reference Methods A & Bn(Enclosed in conduitnor trunking)			2 cables - single phase A.C. Reference Methods C & Fn(clipped direct, on tray or in free air)
					Cables Touching			Cables Spaced*
mm2	mV/A/m	mV/A/m			mV/A/m			mV/A/m
1	44	44			44			44
1.5	29	29			29			29
2.5	18	18			18			18
4	11	11			11			11
6	7.3	7.3			7.3			7.3
10	4.4	4.4			4.4			4.4
16	2.8	2.8			2.8			2.8
		r	x	z	r	x	z	r	x	z
25	1.75	1.8	0.33	1.8	1.75	0.2	1.75	1.75	0.29	1.8
35	1.25	1.3	0.31	1.3	1.25	0.195	1.25	1.25	0.28	1.3
50	0.93	0.95	0.3	1	0.93	0.19	0.95	0.93	0.28	0.97
70	0.63	0.65	0.29	0.72	0.63	0.185	0.66	0.63	0.27	0.69
95	0.46	0.49	0.28	0.56	0.47	0.18	0.5	0.47	0.27	0.54
120	0.36	0.39	0.27	0.47	0.37	0.175	0.41	0.37	0.26	0.45
150	0.29	0.31	0.27	0.41	0.3	0.175	0.34	0.29	0.26	0.39
185	0.23	0.25	0.27	0.37	0.24	0.17	0.29	0.24	0.26	0.35
240	0.18	0.195	0.26	0.33	0.185	0.165	0.25	0.185	0.25	0.31
300	0.145	0.16	0.26	0.31	0.15	0.165	0.22	0.15	0.25	0.29
400	0.105	0.13	0.26	0.29	0.12	0.16	0.2	0.115	0.25	0.27
500	0.086	0.11	0.26	0.28	0.098	0.155	0.185	0.093	0.24	0.26

SPACINGS LARGER THAN ONE CABLE DIAMETER WILL RESULT IN A LARGER VOLTAGE DROP

Table 41DB (Continued)

Conductor cross-sectional area	3 or 4 cables - Three phase A.C. Reference Methods A & Bn(Enclosed in conduit or trunking)			3 or 4 cables - Three phase A.C. Reference Method C & Fn(clipped direct, on tray or in free air)
				Cables touching, trefoil			Cables touching, flat			Cables spaced*, flat
mm2	mV/A/m			mV/A/m			mV/A/m			mV/A/m
1	38			38			38			38
1.5	25			25			25			25
2.5	15			15			15			15
4	9.5			9.5			9.5			9.5
6	6.4			6.4			6.4			6.4
10	3.8			3.8			3.8			3.8
16	2.4			2.4			2.4			2.4
	R	x	z	r	x	z	r	x	z	r	x	z
25	1.5	0.29	1.55	1.5	0.175	1.5	1.5	0.25	1.55	1.5	0.32	1.55
35	1.1	0.27	1.1	1.1	0.17	1.1	0.24	1.1	1.1	1.1	0.32	1.15
50	0.81	0.26	0.85	0.8	0.165	0.82	0.8	0.24	0.84	0.8	0.32	0.86
70	0.56	0.25	0.61	0.55	0.16	0.57	0.55	0.24	0.6	0.55	0.31	0.63
95	0.42	0.24	0.48	0.41	0.155	0.43	0.41	0.23	0.47	0.4	0.31	0.51
120	0.33	0.23	0.41	0.32	0.15	0.36	0.32	0.23	0.4	0.32	0.3	0.44
150	0.27	0.23	0.36	0.26	0.15	0.3	0.26	0.23	0.34	0.26	0.3	0.4
185	0.22	0.23	0.32	0.21	0.145	0.26	0.21	0.22	0.31	0.21	0.3	0.36
240	0.17	0.23	0.29	0.16	0.145	0.22	0.16	0.22	0.27	0.16	0.29	0.34
300	0.14	0.23	0.27	0.13	0.14	0.19	0.13	0.22	0.25	0.13	0.29	0.32
400	0.12	0.22	0.25	0.105	0.14	0.175	0.105	0.21	0.24	0.1	0.29	0.31
500	0.1	0.22	0.25	0.086	0.135	0.16	0.086	0.21	0.23	0.081	0.29	0.3