Does anyone figure out the VD for each section of a circuit or does everyone just add up the total load and the total distance.
An example would be outdoor lighting. Say you have 10 120v lights 100w each. From the panel thru the switch to the first lamp is 100'. Then each light after that is 25' apart.
Do you figure 1000w at 325'? With only 1 size wire start to finish. That's how I've done it.
Or do you do 1000w at 100' for the feed. Then 900w at 125', 800w at 150', 700w at 175', etc..? Then the wire size changes as requiredn thru the different sections.
Tom
