High-Consequence Hazards: Electricity, Fire, Height and Confined Spaces
Recognising activities where a single failure can produce severe harm and specialist control is often needed.
How to prepare for Working Safely
Build a simple worker-level sequence: notice the real hazard, identify exposure and harm, use the strongest available control, and report or escalate weakness.
Core concepts
Concept 1
Electricity can cause shock, burns, fire and secondary injury; damaged or unsuitable equipment should be removed from use.
Exam cue: Choose prevention and engineered protection before personal fall or respiratory equipment.
Concept 2
Fire control addresses ignition, fuel, oxygen, detection, containment and safe evacuation.
Exam cue: Use the emergency arrangements designed for the specific hazard.
Concept 3
Work at height and confined spaces require planned, competent and often specialised control rather than improvisation.
Risk pitfalls and guardrails
Using a chair for short work at height.
Guardrail: Do not normalise a familiar hazard or replace a stronger source control with a warning, procedure or PPE alone.
Entering a confined space to rescue someone without a safe system.
Guardrail: Do not normalise a familiar hazard or replace a stronger source control with a warning, procedure or PPE alone.
Memory anchors
Damage Means Disconnect
Remove unsafe electrical equipment and report it.
Prevent Fire, Preserve Escape
Control ignition and fuel while keeping routes usable.
Avoid Height First
Complete work from a safe level where practicable.
Confined Means Controlled
Do not enter without competent assessment and arrangements.
Rescue Must Be Planned
An unplanned rescuer can become another casualty.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What harm can electricity cause?
A tool cable has exposed conductors. What should the user do?
What does electrical isolation achieve?
A cleaner wants to wipe inside powered equipment. What is required?
Which three elements support combustion?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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