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The sequence of testsWhere do the live tests start?

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Guidance Note 3, section 2.6 gives you the sequence of tests as a colour page (Figure 2.12, p.57).

Where the live tests start. Guidance Note 3's Figure 2.12 (p.57) starts its live tests with earth electrode resistance, where there is an electrode (measured before the installation is energised), then earth fault loop impedance and RCD operation. And polarity by continuity (each circuit, dead) is not the same thing as polarity of supply (live).
≡Even though GN3's page is headed initial verification, the tests run in the same order regardless. That order is what you're being examined on.
✋Section 10 of the On-Site Guide also carries the safe isolation procedure — arguably the best version in the set of books.

GN3 · 2.6 · Figure 2.12 · p.57 · sequence of tests ★ OSG · Section 10 · dead and live tests, and safe isolation ★

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