01MANDATORY
De-Energize
- ✓Identify every electrical energy source before work.
- ✓De-energize equipment whenever work can be performed safely without power.
- ✓Never treat a control switch as an energy-isolating device.
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Health and Safety Resources
Electrical Critical Safety Rules
De-Energize • Lock Out • Verify Absence of Voltage
OSHA 1910 Subpart SLOTO • Shock • Arc FlashISO 45001 Framework
Document
SRN-EL-001
Revision 1.0
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✓
30 SEC CHECKSERNEM Pre-Job Control
Check Before Starting
✓Permit and Risk Assessment
✓Energy Sources
✓LOTO
✓Absence-of-Voltage Test
✓Qualified Person
✓GFCI / RCD
✓Barriers and PPE
02MANDATORY
Apply LOTO
- ✓Lock and tag all electrical isolating devices.
- ✓Each authorized worker must apply a personal lock.
- ✓Control re-energization in accordance with the approved procedure.
03MANDATORY
Verify De-Energization
- ✓Use a suitable and properly functioning test instrument.
- ✓Verify the tester on a known source before and after testing.
- ✓Confirm absence of voltage on every phase and conductor.
04MANDATORY
Qualified Persons Only
- ✓Electrical work must be performed by trained and qualified persons.
- ✓Only qualified persons may test or work on exposed energized parts.
- ✓Verify competence for the task, equipment and hazards involved.
05WARNING
Inspect Equipment
- ✓Inspect cords, plugs, receptacles, panels and tools before use.
- ✓Never use equipment with damaged insulation or exposed conductors.
- ✓Tag defective equipment and remove it from service immediately.
06WARNING
Ground-Fault Protection
- ✓Use suitable GFCI or RCD protection where required.
- ✓Verify grounding conductors and protective devices.
- ✓Never bypass or defeat electrical protective devices.
07WARNING
Control the Work Area
- ✓Barricade open panels and exposed electrical hazards.
- ✓Keep unauthorized persons outside established approach boundaries.
- ✓Maintain a dry, orderly and adequately illuminated work area.
08INFORMATION
Energized Work Controls
- ✓Consider energized work only when technically justified.
- ✓Verify authorization, risk assessment and an approved work method.
- ✓Use PPE and equipment suitable for shock and arc-flash hazards.
Critical Stop Criteria
🛑 Stop Work Now
×
Stop work immediately if electrical isolation and LOTO are not applied
×
Stop work if absence of voltage has not been properly verified
×
Stop work if exposed energized parts are not guarded or barricaded
×
Stop work if cords, plugs, panels or equipment are damaged
×
Stop work if qualified personnel, an approved method or required PPE are unavailable
Technical Control
Critical Values
0 V
Absence-of-voltage verification
LOTO
Lockout and tagout
GFCI / RCD
Ground-fault protection
QUALIFIED
Electrical work and testing
Test Sequence
Test on a known source → test the circuit → reverify on a known source
Reference
OSHA 29 CFR 1910.333 / 1910.334
OSHA 1910 Subpart S • 1926 Subpart K
Personal Protective Equipment
Required PPE
⛑️
Safety Helmet
EN 50365
🥽
Safety Glasses
EN 166
🧤
Voltage-Rated Gloves
EN 60903
🥾
Safety Footwear
EN 50321-1
🧥
Arc-Rated Clothing
IEC 61482
Select PPE based on voltage, shock and arc-flash hazards.
Voltage Rating
Gloves and equipment must match the working voltage.
Arc Hazard
Arc rating must be selected from the risk assessment.