Load Calculation Feeders and Services Level 4 Module 1 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

Load Calculation Feeders and Services Level 4 Module 1 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the primary purpose of a load calculation in electrical systems? To determine the amount of electrical power required to safely and efficiently operate all connected devices. Why is it important to consider demand factors when calculating loads? Demand factors account for the likelihood that not all loads will operate simultaneously, reducing overdesign. What is the standard unit of measurement for electrical load? The watt (W) is the standard unit of measurement for electrical load. What information is required to calculate feeder loads? The connected load, demand factors, and any applicable continuous load adjustments. 2 Why are continuous loads calculated differently in feeder and service load calculations? Continuous loads run for extended periods and must include a 125% adjustment for safety. What role does the National Electrical Code (NEC) play in load calculations? The NEC provides guidelines and requirements to ensure load calculations are safe and code-compliant. What is the significance of branch circuit load calculations in feeder and service load determination? Branch circuit calculations ensure accurate totals for feeder and service loads by accounting for individual circuits. What adjustment should be made for neutral loads in feeder calculations? Neutral loads may require derating based on specific NEC guidelines for unbalanced loads. What is the purpose of applying diversity factors in load calculations? Diversity factors reduce calculated loads by considering the varying usage patterns of connected devices. 3 How is the load for lighting circuits typically calculated? Lighting loads are calculated based on watts per square foot as specified by the NEC. What is the primary consideration when calculating HVAC loads in service feeders? HVAC loads must account for the largest motor load and its associated startup surge. What is a demand factor, and why is it applied to specific loads? A demand factor reduces the calculated load to reflect realistic usage rather than theoretical maximums. Why are motor loads given special consideration in load calculations? Motors often have high inrush currents and continuous operation, requiring additional capacity. What must be included when calculating appliance loads in residential services? All fixed appliances and a minimum number of general-use circuits based on square footage. Why is it important to size feeders and services properly? 4 Proper sizing prevents overheating, voltage drops, and ensures safe operation of electrical systems. How are electric water heaters factored into load calculations? Electric water heaters are considered continuous loads and must include a 125% adjustment. What is the minimum ampacity requirement for a feeder circuit? The minimum ampacity must meet or exceed the calculated load after all adjustments and demand factors are applied. What is the process for calculating the load for an electric range? Use the NEC demand factor table for ranges based on the number of units installed. How do you determine the load for a commercial building with multiple tenant units? Calculate the load for each tenant separately, then