In this electricians' Q&A video, we delve into the world of circuit breakers and uncover the meanings behind the specifications printed on them. Have you ever wondered the difference between a 6kA and a 10kA MCB? Well, wonder no more! We'll explain what ICN means and how it's related to prospective fault current ratings. We'll also explore the regulations surrounding installing protective devices, including the importance of measuring or calculating the prospective fault current. Joe Robinson will guide you through the three options for determining prospective fault current and provide practical examples for measuring or calculating it. Plus, we'll reveal why devices rated higher than 6kA are sometimes necessary and the specific criteria that must be met for domestic installations. Want to learn more about circuit protection check out this FREE CPD training module 👉https://training.efixx.co.uk/course/circuit-protection-devices