Grounding and Bonding

$($Article $250$ Part $3)$

Practical Exercise

Using table $250\mathrm{.}66,310\mathrm{.}15(B)[16],$ and ary other section of the NEC, design a service drop from Utility to Building A

What size SE cables are you using?

What grounding electrode and canductor are you planning on using for bulding A$?$ How deep?

Using the charts provided design an underground sub feed from building $A$ to building $B$

Building $B$ is sub$-$feeding off of building $A.$ How do you plan to ground it$?$

$100$ Amp Sub$-$ Pane

Yard

id like help on each question. i am to refer to table nec $250.66$ & then nec table $310\mathrm{.}15($B$)(16).$ chegg only allows $1$ picture per post.