شركة الخليج للكابلات والصناعات الكهربائية

Voltage Drop (mV/ A /m)

Voltage Drop (mV/A/m)

Nominal Area of Conductor	2 Cables single phase ac (enclosed in conduit or trunking)			3 or 4 cables, three phase ac (enclosed in conduit or trunking)
Sqmm	Reference method A & B			Reference method A & B
1		44			38
1.5		29			25
2.5		18			15
4		11			9.5
6		7.3			6.4
10		4.4			3.8
16		2.8			2.4
	r	x	z	r	x	z
25	1.80	0.33	1.80	1.50	0.29	1.55
35	1.30	0.31	1.30	1.10	0.27	1.10
50	0.95	0.30	1.00	0.81	0.26	0.85
70	0.65	0.29	0.72	0.56	0.25	0.61
95	0.49	0.28	0.56	0.42	0.24	0.48
120	0.39	0.27	0.47	0.33	0.23	0.41
150	0.31	0.27	0.41	0.27	0.23	0.36
185	0.25	0.27	0.37	0.22	0.23	0.32
240	0.195	0.26	0.33	0.17	0.23	0.29
300	0.160	0.26	0.31	0.14	0.23	0.27
400	0.130	0.26	0.29	0.12	0.22	0.25
500	0.110	0.26	0.28	0.10	0.22	0.25
630	0.094	0.25	0.27	0.08	0.22	0.24

Note: For cables having conductors of 16 mm² or less cross-sectional area, their inductance can be ignored and (mV/A/m)_r,values only are tabulated. For cables having conductor greater than 16 mm² cross-sectional area the impendence values are given as (mV/A/m)_z,together with the resistive component (mV/A/m)_r,and the reactive component (mV/A/m)_x