When two dwelling units are supplied by a single feeder, the applicable load is the greater of the two unit loads, even if they are equal.

When two dwelling units are supplied by a single feeder, the applicable load is the greater of the two unit loads, even if they are equal.

• A. Greater of the two loads
• B. Sum of the two loads
• C. Average
• D. The smaller one

Answer: (A)

When two dwelling units share one feeder, the feeder’s load calculation uses the larger of the two unit demands. This reflects how a common feed is considered: the feeder must be capable of delivering at least the higher demand, and the second unit’s demand is treated in a way that does not require doubling the feeder size for this scenario. If both units happen to draw the same maximum, the feeder is still sized to that same level, not twice that amount. In practice, this is a conservative design assumption used in this context to account for non-coincident loading and simplify calculations. For example, if one unit’s load is 60 A and the other is 60 A, the feeder is sized for 60 A, not 120 A.

When two dwelling units share one feeder, the feeder’s load calculation uses the larger of the two unit demands. This reflects how a common feed is considered: the feeder must be capable of delivering at least the higher demand, and the second unit’s demand is treated in a way that does not require doubling the feeder size for this scenario. If both units happen to draw the same maximum, the feeder is still sized to that same level, not twice that amount. In practice, this is a conservative design assumption used in this context to account for non-coincident loading and simplify calculations. For example, if one unit’s load is 60 A and the other is 60 A, the feeder is sized for 60 A, not 120 A.