John Whitfield Electricians Guide ~upd~ Site

: Explanations of BS 7671 and how to apply them to modern installations.

| Resource | Use with Whitfield | |----------|----------------------| | IET Guidance Note 3 | Official regulation references | | IET On-Site Guide | Quick tables for max Zs, cable factors | | City & Guilds 2391-52 past papers | Exam practice | | YouTube (e.g., John Ward, eFIXX) | Visual walkthroughs of tests | john whitfield electricians guide

During an initial verification on a new lighting circuit, you measure insulation resistance between live conductors at 0.8 MΩ. What do you do? : Explanations of BS 7671 and how to