Electricity
Control electrical contact, arcing and fire through design, isolation, protection, inspection and careful use.
How to prepare for SSSTS
Connect each duty and hazard to the supervisor's workface sequence: check the task and RAMS, brief the team, establish controls, observe and intervene, then report and learn.
Core concepts
Concept 1
Electrical risk arises from overhead and buried services, temporary systems, tools, leads and unauthorised alteration.
Exam cue: Check supply, voltage, environment, protection and equipment condition.
Concept 2
Lower-voltage systems, RCD protection, robust distribution and planned inspection reduce but do not eliminate risk.
Exam cue: Route and protect cables against water, impact, crushing and trip hazards.
Concept 3
Isolation must identify the correct source, secure it against reconnection and prove the system dead where required.
Exam cue: Use competent persons for installation, repair and verification.
Risk pitfalls and guardrails
Assuming 110-volt equipment cannot cause harm.
Guardrail: Do not use a signature, course certificate or verbal instruction as a substitute for a missing competent plan or physical control.
Resetting a repeatedly tripping device without finding the cause.
Guardrail: Do not use a signature, course certificate or verbal instruction as a substitute for a missing competent plan or physical control.
Treating a switch in the off position as secure isolation.
Guardrail: Do not use a signature, course certificate or verbal instruction as a substitute for a missing competent plan or physical control.
Memory anchors
Design, Protect, Inspect
Build safety into supply and use.
Isolate, Lock, Prove
Prevent reconnection and confirm the state.
Trip Means Check
Do not defeat protective-device warnings.
Keep Leads Safe
Protect cables from damage, water and routes.
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
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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