For farm buildings, the load for feeders, service conductors, and service equipment shall be computed using the demand factors of Table 220.102(B) when the load is supplied by how many branch circuits?

For farm buildings, the load for feeders, service conductors, and service equipment shall be computed using the demand factors of Table 220.102(B) when the load is supplied by how many branch circuits?

• A. three
• B. four
• C. one
• D. two

Answer: (D)

The main idea is that for farm buildings, the load on feeders, service conductors, and service equipment is not simply the sum of all connected loads. You apply demand factors from Table 220.102(B) to reflect that not all circuits will be loaded to full capacity at the same time. The table provides different factors depending on how many branch circuits actually supply the load. In this case, the scenario specifies two branch circuits, so you use the two-branch-circuit column of Table 220.102(B). That reduces the calculated load compared to the full sum, which is why two is the correct choice. If there were one branch circuit, you wouldn’t apply these demand factors in the same way; with three or more circuits, a different column of the table would apply.

The main idea is that for farm buildings, the load on feeders, service conductors, and service equipment is not simply the sum of all connected loads. You apply demand factors from Table 220.102(B) to reflect that not all circuits will be loaded to full capacity at the same time. The table provides different factors depending on how many branch circuits actually supply the load. In this case, the scenario specifies two branch circuits, so you use the two-branch-circuit column of Table 220.102(B). That reduces the calculated load compared to the full sum, which is why two is the correct choice. If there were one branch circuit, you wouldn’t apply these demand factors in the same way; with three or more circuits, a different column of the table would apply.