Electrical Inspection, Testing and Certification Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Electrical Inspection, Testing and Certification Exam. Study with interactive questions and in-depth explanations. Ace your certification!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the purpose of the EFLZ values correction in BS7671?

The correction ensures safety in electrical wiring
To reduce the conductor size needed for installation
To account for environmental temperature variations
To reflect the actual conductor operating temperature

The correct answer is: To reflect the actual conductor operating temperature

The purpose of the EFLZ (Earth Fault Loop Impedance) values correction in BS7671 focuses on reflecting the actual conductor operating temperature. When calculating the earth fault loop impedance, it is essential to consider how temperature affects the resistance of conductors. Conductors can have varying resistances based on their operating temperatures, meaning that the performance of the electrical installation can be influenced significantly by temperature changes. The EFLZ values correction is implemented to ensure calculations take into account the temperature at which the conductors will operate, ensuring that the electrical installations are effective and comply with safety standards. This ultimately helps in ensuring that the earth fault protection operates correctly, contributing to the safety and reliability of electrical systems.