The rule about a 25-foot tap length comes from the taps section of the NEC, specifically the provision that defines the allowable length for a tap conductor from the last overcurrent protective device to the point of utilization. This 25-foot limit is what lets a short, direct connection be treated under tap rules rather than as a full feeder, simplifying sizing and protection as long as other requirements are met. That exact 25-foot tap rule is found in NEC 240.21(B)(2). If the run is longer than 25 feet, different tap conditions apply (covered under other parts of 240.21(B)), not the 25-foot rule. The other options address unrelated topics: 230.6 concerns service disconnect requirements, and Table 430.250 deals with motor overload protection, not the tap-length rule. So the correct place to find the 25-foot tap rule is NEC 240.21(B)(2).

General lighting loads for non-dwelling occupancies come from NEC Table 220.42(A). This table lists the lighting unit load in VA per square foot for different types of nonresidential occupancies. To size feeders or a service, you multiply the building area by the unit load from the table for the specific occupancy, then apply any applicable demand factors and add to other loads as needed. The other sections referenced in the choices relate to different types of loads or parts of the code (such as motors or other calculations) and do not provide the general lighting unit loads for non-dwelling occupancies.

In a single-phase system, apparent power S equals voltage times current: S = V × I. So the current is I = S / V. Here, S is 30,000 VA and V is 240 V, so I = 30,000 / 240 = 125 A. Verifying: 125 A × 240 V = 30,000 VA, which matches the given load. If you were using real power instead of apparent power, you’d divide by the voltage and multiply by the power factor, but with apparent power the division by voltage gives the current directly.

The concept tested is how continuous loads are treated when sizing feeders. Continuous loads are defined as those that run for 3 hours or more in a 24-hour period. To prevent overheating and provide adequate margin for long-term operation, the ampacity for continuous loads is increased by 125% when sizing feeders and services. Noncontinuous loads do not get this increase because they aren’t sustained long enough to cause the same heating risk. In practice, you size the feeder by adding 1.25 times the continuous-load amperage to the actual amperage of the noncontinuous loads. For example, if there is a continuous load of 40 A and a noncontinuous load of 20 A, the feeder would be sized for 1.25 × 40 + 20 = 50 + 20 = 70 A. So the type that must be increased by 125% is the continuous load.