Voltage Drop
Phase
Conductor
V
A
m
mm²
cos φ
Voltage Drop Limits by Standard
| Standard | Lighting | Power | Total Max |
|---|---|---|---|
| IEC 60364 | 3% | 5% | 5% |
| NEC (US) | 3% | 3% | 5% |
| BS 7671 (UK) | 3% | 5% | 5% |
| DEWA (UAE) | 2.5% | 4% | 5% |
Match cable losses to the right transformer
Voltage drop sizing is one half of the LV/MV design — pair it with the matching transformer class and cable specification.