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After the R1 + R2 test: record it, and tick polarityWhich lampholders need their own polarity check?
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- Record the highest R1 + R2 on the circuit in the R1 + R2 column — column 21 — of the schedule of test results.
- Because method 1 had your probes on the marked terminals at every point, a line–neutral swap would have shown as open circuit. With inspection confirming line and CPC aren’t swapped with each other (the one swap this test can’t see), you can tick the polarity column (26) for that circuit.
- Put back every cover, plate and luminaire you took off.
Guidance Note 3 · 2.6.12 · polarity · the Edison screw lampholder · p.77
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