I85PREP
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New York Low Voltage Practice study materials
New York Low Voltage Practice study resources

New York Low Voltage Practice: Electrical Safety, Jobsite Practices, and OSHA Requirements

New York Low Voltage Practice · Work through your exam, one topic at a time.

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Electrical Safety, Jobsite Practices, and OSHA Requirements

The controlling hazards

OSHA 29 CFR 1926 Subpart K governs electrical safety on construction sites; 1910.147 covers lockout/tagout. Low voltage is not automatically safe: 24 V batteries, PoE, and control power can deliver high fault current or arc.

  • Apply lockout/tagout, verify zero energy, and use a meter rated for the category and voltage.
  • Temporary receptacles require GFCI protection or an assured equipment grounding conductor program under 1926.404(b)(1).
  • Use voltage-rated gloves and arc-rated PPE per NFPA 70E when justified; provide fall protection at 6 ft under 1926.501.
  • Use ladders per 1926.1053; do not use metal ladders near energized equipment.

Worked example

A technician uses a CAT II meter to check a 480 V disconnect. The meter category is insufficient for the available fault current, and a transient can arc across the meter. The correct meter is CAT III or CAT IV for the location, with intact leads and a proving unit before and after the check.

Traps

Treating 24 V as hazard-free; working alone in a panel; using damaged test leads; bypassing lockout/tagout; relying on a panel GFCI instead of point-of-use protection.