Load calculation Feeders and services Level 4 Module 1 Questions with 100% Correct Answers Latest Version 2024

What is the demand factor allowed by the NEC® for calculating the neutral conductor size for electric range load? - 70% Using the VA/linear foot method, the total VA that must be used in a service calculation for a 50' show window is - 12,500VA Before it is considered a continuous load, a load must operate for at least how many hours without interruption? - 3 Which of the following factors does not affect conductor ampacity adjustments? - Number of phase If a continuous connected load totals 120A, what is the minimum current-carrying capacity required for the feeder? - 150A What is the load center length for a tapped feeder with loads of 120A at 50', 110A at 60', 75A at 90', and 70A at 150'? - 79.60 Which of the following lighting loads would be used in a residence that is 1,650 sq ft? - 4,950VA What is the load for 40 non-dwelling unit receptacles? (Assume that the load is not continuous.) - 7,200VA The minimum service rating for a residential service is - 100A Residential small appliance circuit must be rated at - 1,500VAUse of the 100' tap rule is limited to installation in high-bay manufacturing buildings with wall heignt over - 35 feet Which part of a residential lighting and small appliance load must be rated at 35% for service calculations? - The next 177,000VA If a store lighting load is 14,000VA (continuous), which of the following must be used for the circuit calculation? - 17,500VA In most cases, feeder conductor size is adjusted when - there are more than three current-carrying conductors in the raceway When calculating the service requirement for a particular building, the step is to - determine the floor area of the building What is the feeder ampacity for a three-phase, 120/208V subpanel with a connected load of 84,563VA? - 235A Which part of a residential lighting and small appliance load must be rated at 35% for servives - An optional method for determining feeder to schools is covered in - NEC® Section 220.86 Refer to the figure above. What is the total load of a feeder serving four 230V motors rated 5hp, 15hp, 20hp, and 40hp? - 241.2 Refer to the figure above. Calculate the minimum ampacity for a feeder serving the following 460V motor: 10hp, 20hp, and 30hp. - 91A Refer to the figure above. What is the total load a feeder serving four 2hp motors, three 5hp motors, one 15hp motor, and one 25 hp motor? All motors are 208V. - 219.8 A