CalculationsQuestion 9 of 110
A dwelling's total calculated load is 24,000 VA on a 240-V, single-phase service. What is the calculated service current?
a.100 A
b.120 A
c.83 A
d.167 A
Explanation
Current equals volt-amperes divided by voltage: 24,000 VA / 240 V = 100 A.
Practice all 110 questions free — no signup required.
Related questions on this topic
- A single household range is rated 16 kW. Using the 5% increase per kW over 12 kW rule on the 8-kW base, what is the demand load?
- A dwelling has one 4-kW electric clothes dryer. What value must be used as the dryer demand load in the service calculation?
- A dwelling has four fastened-in-place appliances (dishwasher, disposal, water heater, compactor) totaling 6,000 VA. What is the demand load after applying the fastened-appliance demand factor?
- Using the 75 C column, what is the smallest copper conductor rated to carry a 100-A service load?
- For a 200-A dwelling service using the 83% conductor allowance, what is the smallest copper ungrounded conductor (75 C) permitted for the main power feeder?
- An electric range has a Column C demand of 8,000 VA. Using the 70% neutral demand for ranges, what is the range contribution to the feeder neutral load?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Master Electrician Licensing Exam (NEC-based) · How we review