Residential Load Calculations:https://www.youtube.com/watch?v=er07gUB1l7g
Sizing Junction Boxes:https://www.youtube.com/watch?v=WHiXxc4_zyA
Box Fill:https://www.youtube.com/watch?v=61Gd0Otu8fE
Ch. 9 Overview:https://www.youtube.com/watch?v=DHrhQAsLga4