voltage Considerations IEEE std 141

[eanton22]

The voltage drop V obtained from IEEE std 141 is called the line to neutral voltage drop. Line to line voltage to be computed by multplying by

2-single phase
1.732 for three phase.

When doing an approximate voltage drop based on the above, do we take in account the line to neutral or the line to line voltage drop? It is recommended a 3% Voltage drop but is this for line to neutral or line to line?

Thanks

 

[eanton22]

any thoughts?

 

[jim dungar]

It all depends on if you are calculating for line-neutral loads fed from a 3-phase system, and therefore using L-N voltage (i.e. 277), or for a different voltage.

The 3% is for any result.

I live, mostly in the 'industrial' world, I almost never calculate for L-N loads.