Voltage Drop at service

[ziptie]

Hi guys,

If there was a voltage drop of 20V on a 3ph line of 347/600, is the voltage at the service 327V or 580V, or both? Thanks you for reading.

Zip

 

[charlie b]

Try 335/580. That presumes a balanced three-phase load. The phase-to-phase voltage drops by 20. The phase-to-neutral voltage is equal to the phase-to-phase divided by the square root of 3.

Welcome to the forum.

 

[Smart $]

Try 335/580. That presumes a balanced three-phase load. The phase-to-phase voltage drops by 20. The phase-to-neutral voltage is equal to the phase-to-phase divided by the square root of 3.

Is that an IEEE convention?

Just wondering, because Chapter 9 Table 9 states values in Ohms to Neutral, which seems to imply voltage drop would be given in volts to neutral, even more so when dealing with unbalanced currents.