Derating

[Alwayslearningelec]

Anyone see anything wrong with these calcs?
Looks good to me and seems like a very handy chart to have.

 

[infinity]

With a quick glance the numbers look correct but I find this thing to be hard to read and somewhat confusing.

 

[Alwayslearningelec]

With a quick glance the numbers look correct but I find this thing to be hard to read and somewhat confusing.

lol..and the incorrect spelling of maximum ..lol

 

[Canton]

Not an “eye” user friendly chart. I use apps on my phone in this day and age, versus paper charts, slide rulers, etc.

 

[kwired]

Simpler to just remember that for 10 AWG and below you can have max of 9 current carrying conductors before adjustments will likely make you increase conductor size. Kind of applies to conductors larger than 10 AWG as well but I won't say it will always apply. But you generally don't run that many of those larger conductors together all that often either other than if you have already increased their size for adjustment reasons.

 

[electrofelon]

Yeah kinda confusing and hard to read. Doesnt use MWBC's and assumes a wire EGC so pretty much worthless in my book.