For this table-lookup exercise, a common bonding jumper is explicitly sized from the combined area of two 250 kcmil conductors. The supplied table assigns 2 AWG for over 3/0 through 350 kcmil and 1/0 AWG for over 350 through 600 kcmil. Which listed size follows?
- A2 AWG copper
- 1/0 AWG copper
- C4 AWG copper
- D3/0 AWG copper
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why B is correct
The supplied common-jumper basis is 250 + 250 = 500 kcmil, in the stated over-350-through-600 range. Do not generalize this arrangement to an individual jumper for one raceway.