Load Calculations – Feeders and Services (26401) Practice Test

In demand calculations for heating loads, it is standard practice to use 100% of the heating load. This approach ensures that the entire heating requirement is accounted for, allowing for a complete assessment of the system's capability to meet the maximum demand. By considering the full load, the design can maintain comfort and safety in the intended space during the coldest conditions.

Using 100% for heating loads also aligns with the principle of providing adequate capacity and avoiding potential shortfalls during peak usage periods. It is crucial in ensuring that the heating system operates efficiently and effectively without the risk of insufficient heat output.

In contrast, the other percentages typically apply to different types of loads or specific demand factors. For instance, using a reduced percentage might be relevant for continuous loads or where a diversity factor is applicable, but for heating loads, the intention is to capture the full demand to guarantee proper system functionality.