NEC Code Questions and Answers: Connected Load vs. Demand Load

NEC Code Questions and Answers: Connected Load vs. Demand Load

*Affiliate Disclosure* Posts within this website may contain affiliate links, which means we receive a small percentage if you make a purchase using affiliate links. We only support affiliates we believe have quality products and services for our readers.

Spread the love

NEC Code Questions and Answers

Preparing for the Texas electrician exam requires a comprehensive understanding of electrical concepts, including load calculations. One critical distinction that can significantly impact your exam success is knowing the difference between the connected load and the demand load. In this guide, we'll delve into this essential topic to ensure you're well-prepared for the state exam with this type of NEC code questions and answers.

Must have formulas for your electrical exam

Connected Load: The Starting Point

The connected load, often referred to as the connected load VA (Volt-Amperes), represents the sum of the ratings or nameplate values of all electrical devices, fixtures, and appliances connected to a circuit or electrical system. It's essentially the total capacity or potential load that could be drawn if all connected devices operated simultaneously at their maximum ratings.

Understanding the connected load is foundational for load calculations, as it provides the starting point for assessing the electrical requirements of a system. During the Texas electrician exam, you may encounter questions that require you to determine the connected load accurately.

Demand Load: The Realistic Load

On the other hand, the demand load represents the actual load or power consumption that a system or circuit is expected to draw based on typical usage patterns. It takes into account the probability that not all connected devices will operate simultaneously at their maximum ratings.

The demand load considers diversity and load factors, reflecting real-world scenarios where not all appliances or equipment run simultaneously at their peak. This load calculation method provides a more realistic assessment of a system's electrical requirements.

Other Calculation NEC Code Questions in the Master Exam

33 Items (including 3 Non-Scored Items) 170 Minutes - 70% Correct to Pass


Subject Area # of Items

  • Calculations and Theory 2
  • Electrical Services, Service Equipment, and Separately Derived Systems 8
  • Electrical Feeders 3
  • Branch Circuit Calculations and Conductors 4
  • Electrical Wiring Methods and Electrical Materials 2
  • Electrical Equipment and Devices 2
  • Motors and Generators 6
  • Electrical Control Devices and Disconnecting Means 1
  • Special Occupancies, Equipment, and Conditions 1
  • Renewable Energy Technologies 1

Exam Significance

Understanding the difference between the connected load and the demand load is crucial for success on the Texas electrician exam. Questions related to load calculations may involve scenarios where you need to calculate the demand load based on the connected load and specific diversity or load factors.

Mastering this distinction enables you to apply load calculation principles accurately, ensuring that your electrical designs and installations meet code requirements and safety standards.


As you embark on your journey to become a licensed electrician in Texas, remember that load calculations are a fundamental aspect of the profession. Knowing the difference between the connected load and the demand load is not only crucial for exam success but also for your future career as a skilled electrician.

By grasping this essential distinction, you'll be better equipped to tackle load calculation questions on the Texas electrician exam and, more importantly, to provide safe and compliant electrical installations in the real world.

Spread the love

Get Square for your business. Try it out here. Process $1,000 without fees when you activate with our link.

Posted in Exam Prep Questions and tagged , .