Which option best describes the EVSE service feeder load calculation outcome?

Which option best describes the EVSE service feeder load calculation outcome?

• A. 1500 VA
• B. 7200 VA
• C. 5800 VA
• D. 3000 VA

Answer: (B)

When sizing the EVSE service feeder, you convert the charging circuits into VA (voltage times current) and then apply the appropriate demand factors to reflect that not all chargers will draw full power at the same time. The feeder load is the sum of those adjusted loads, not just a simple full-load addition. In this scenario, after using the correct demand factors for the number of charging ports and the system voltage, the calculated feeder load comes out to 7,200 VA. That value represents the actual expected demand the service must be sized for, balancing the need to supply power with the reality that simultaneous full-power use is unlikely. If you ignore the demand factors or miscount the number of ports, you’d end up with a different number—either too high or too low. The 7,200 VA result is the outcome that best matches the intended sizing method for EVSE feeders in this setup.

When sizing the EVSE service feeder, you convert the charging circuits into VA (voltage times current) and then apply the appropriate demand factors to reflect that not all chargers will draw full power at the same time. The feeder load is the sum of those adjusted loads, not just a simple full-load addition.

In this scenario, after using the correct demand factors for the number of charging ports and the system voltage, the calculated feeder load comes out to 7,200 VA. That value represents the actual expected demand the service must be sized for, balancing the need to supply power with the reality that simultaneous full-power use is unlikely.

If you ignore the demand factors or miscount the number of ports, you’d end up with a different number—either too high or too low. The 7,200 VA result is the outcome that best matches the intended sizing method for EVSE feeders in this setup.