Hello I am a 2nd year as an electrical apprentice that missed my last 2 weeks of school after my appendix ruptured. I am attempting to learn how to calculate voltage drop for a challenge exam. I only have a few examples and the other test questions were not a problem. Am I in the zone with this example ? Is there anywhere online I can get additional help ?
Find the copper wire size. Install a 240 volt 100 Amp panel 56 meters( 184 feet) away from a meter base. Ambient temperature nominal.Considering this is a service I am using a 5% voltage drop according to 8-102(b) and am unsure how to arrive at my wire size.
From using example (9) from Table D3 this is what I have come up with.
X= distance im meters to center of distribution
X x 5(%) x 1.00(DCF) x (240/120V)= distance
10X=distance Distance =10m
Using table D3 under the 200Amp column I have picked a 3/0 conductor ???
My next issue is how do I deal with Amperages or distances that exceed chart values ?
Thanks, your frustrated apprentice
