NEN 3140 §6.2.3
Verifying absence of voltage
Afwezigheid van spanning vaststellen
Also known as: spanningsloos, spanningsvrij, voltage-tester, afwezigheid-van-spanning, absence-of-voltage, undervoltage, onder-spanning, onderspanning, loto-spanningstester-cat3, nul-energiestatus-verificatie, spanningstester-validatie
Determine absence of voltage: Step 3 of five safety rules—measure between all live parts inter- and against PE using an approved two-pole voltage tester, verifying before and after with a known voltage source.
Practical example
Verify absence of voltage
Common mistake
Verify absence of voltage. Common mistake: Relying solely on a non-contact voltage tester (pen) without two-pole measurement; it may falsely indicate 'dead' on shielded cables or low residual voltage.
See also
Related terms
In-depth guides
- → NEN-EN-IEC 60974 Arc welding — electrical safety and open-circuit voltage
- → IEC 61230 (aardingsset) Earthing and short-circuiting sets — periodic testing per IEC 61230
- → ISO 13849-1 ISO 13849-1 — Performance Levels (PLa-PLe) of safety controls
- → §6.3 Working De-energized — The 5 Steps (LOTO)
- → Scope NEN-EN-IEC 60204-1 — electrical safety of machinery
- → IEC 61643-11 Status indicator and thermal disconnection of surge protective devices (SPDs) — IEC 61643-11
Beschikbaar in: English, Nederlands, Polski, Русский, Українська