شركة الخليج للكابلات والصناعات الكهربائية

Voltage Drop

Voltage Drop at maximum conductor operating temperature in V/A/KM

Conductor Size	1 Core unarmoured cables				1 Core unarmoured cables	Un- armoured & Armoured	3 & 4 Un- armoured & Armoured
Sq. mm	1 Ph(A)	3 Ph(B)	1 Ph(C)	3 Ph(D)	3 Ph	1 Ph	3 Ph
1.5	31	27	31	27	27	31	27
2.5	19	16	19	16	16	19	16
4	12	10	12	10	10	12	10
6	7.9	6.8	7.9	6.8	6.8	7.9	6.8
10	4.7	4.0	4.7	4.0	4	4.7	4.0
16	2.9	2.5	2.9	2.5	2.5	2.9	2.5
25	1.90	1.65	1.85	1.60	1.60	1.90	1.65
35	1.35	1.15	1.35	1.15	1.15	1.35	1.15
50	1.05	0.90	1.00	0.87	0.87	1.00	0.87
70	0.75	0.65	0.71	0.61	0.62	0.69	0.6
95	0.58	0.50	0.52	0.45	0.47	0.52	0.45
120	0.48	0.42	0.43	0.37	0.39	0.42	0.37
150	0.43	0.37	0.36	0.31	0.33	0.35	0.30
185	0.37	0.32	0.307	0.26	0.28	0.29	0.26
240	0.33	0.29	0.25	0.22	0.24	0.24	0.21
300	0.31	0.27	0.22	0.195	0.21	0.21	0.185
400	0.29	0.25	0.20	0.175	0.20	0.190	0.165
500	0.28	0.24	0.185	0.160	0.18	-	-
630	0.27	0.23	0.175	0.150	0.17	-	-

A -----> 2 cables, enclosed in Conduit or trunking

B -----> 3 or 4 cables , enclosed in Conduit or trunking.

C -----> 2 cables, clipped direct, on tray or in free air (Cable Touching)

D -----> 3 or 4 cables, clipped direct, on tray or in free air (Cable Touching, trefoil)