CSLB C-10 Electrical ContractorPlanning and EstimatingEasy
A client is planning a new commercial office building. The blueprints specify a 208V, 3-phase, 4-wire service with a total general lighting load of 30,000 VA and 15,000 VA of receptacle loads. All loads are considered non-continuous. What is the minimum calculated demand load for the general lighting and receptacle loads, before applying any demand factors for receptacles?
- A45,000 VA
- B33,000 VA
- C30,000 VA
- D37,500 VA
Show answer & explanationAnswer & explanation
Correct answer: A. 45,000 VA
The question asks for the minimum calculated demand load for general lighting and receptacle loads before applying any demand factors. In this case, it's a direct sum of the given VA values.
Why the other options are wrong
- B. This is an incorrect calculation, possibly applying a demand factor prematurely or incorrectly.
- C. This only accounts for the general lighting load.
- D. This incorrectly applies a partial demand factor or miscalculates the sum.
Total Connected Load
The sum of the volt-ampere (VA) ratings of all electrical equipment and loads connected to a wiring system or service, before applying any demand factors.
- Represents the maximum potential load if all equipment operates simultaneously.
- Used as a starting point for load calculations.
- Demand factors are applied to this value to determine the actual service or feeder size.
Memory trick: Connect ALL the lights and plugs for the total picture.