Power Lines, Weather and Stop-Work Triggers
Control overhead lines, approach distance, isolation confirmation, wind, lightning, poor visibility, rain and stop-work decisions.
How to study crane and rigging decisions
Practice like a lift supervisor: verify competent people, calculate the actual lift, protect the ground, inspect every lifting point, control the load path, stop for communication or weather failures, and document defects before the next shift inherits them.
Core concepts
Concept 1
Confirm voltage and isolation or minimum approach distance, set barriers and a dedicated spotter, and stay outside controlled clearance.
Exam cue: overhead line clearance
Concept 2
Stop or lower the panel when wind exceeds plan limits or control is lost, then revise timing, rigging, tag lines or crane selection.
Exam cue: wind sail effect
Concept 3
Suspend lifting, secure load and boom safely, clear exposed personnel, and restart only after storm controls allow.
Exam cue: lightning stop-work
Targeted study blocks
Simulation focus
Power Lines, Weather and Stop-Work Triggers
Control overhead lines, approach distance, isolation confirmation, wind, lightning, poor visibility, rain and stop-work decisions.
Risk pitfalls and guardrails
Treating verbal permission as written authorization.
Guardrail: Avoid verbal approval, copied readings, skipped isolation, and after-the-fact record traps.
Proceeding without recording readings, isolation, PPE, or exposure-control evidence.
Guardrail: Avoid verbal approval, copied readings, skipped isolation, and after-the-fact record traps.
Choosing a generic answer without checking state variation or the latest official notice.
Guardrail: Avoid verbal approval, copied readings, skipped isolation, and after-the-fact record traps.
Memory anchors
overhead line clearance
Confirm voltage and isolation or minimum approach distance, set barriers and a dedicated spotter, and stay outside controlled clearance.
wind sail effect
Stop or lower the panel when wind exceeds plan limits or control is lost, then revise timing, rigging, tag lines or crane selection.
lightning stop-work
Suspend lifting, secure load and boom safely, clear exposed personnel, and restart only after storm controls allow.
visibility communication stop
Stop movement until visibility or communication is restored through dust control, radios, repositioned signalers or postponed lifting.
Official source check
Verify eligibility, forms, fees, validity, and safety requirements with State Factories Inspectorates / Directorate of Industrial Safety and Health / Sector skill and lifting-equipment safety authorities or the current state authority notice.
Stop-work cue
If identity, authorization, isolation, PPE, exposure limits, or emergency controls are unclear, stop work and escalate.
Record cue
Exam-safe answers protect written records, competent sign-off, instrument readings, and traceable corrections.
Shortcut trap
Fast results, verbal approval, copied certificates, and undocumented adjustments are common trap answers.
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
A crane must slew near an overhead line, but voltage and isolation status are unknown. What is required before setup or movement?
Who should confirm that an overhead line has been de-energized and made safe for the lift?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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