Voltage Drop Calculation

[A/A Fuel GTX]

I'm installing a 100A, 240V, single phase sub panel that will have a run of 150' from the main panel. There will be 120V as well as 240V loads derived from the sub panel. Would I use a value of 240V when calculating the voltage drop in this scenario even though there will be 120V loads involved?

 

[Cow]

I'm installing a 100A, 240V, single phase sub panel that will have a run of 150' from the main panel. There will be 120V as well as 240V loads derived from the sub panel. Would I use a value of 240V when calculating the voltage drop in this scenario even though there will be 120V loads involved?

Yes to 240v.

 

[kwired]

I'm installing a 100A, 240V, single phase sub panel that will have a run of 150' from the main panel. There will be 120V as well as 240V loads derived from the sub panel. Would I use a value of 240V when calculating the voltage drop in this scenario even though there will be 120V loads involved?

Try to balance 120 volt as much as possible so there is limited neutral load and calculate voltage drop based on the max value expected on the ungrounded conductors @240 V. That is the simple method and generally should work. If you want precision it gets complex - not even sure I know how to determine it. You have to remember there is three voltages, three currents, and a common conductor, change value of any one component and the others are all effected.