Chart
Overhead powerline clearance zone diagram
Map common overhead powerline clearance zones around buildings, ladders, scaffolds, and service work in Canada.
Does not set a universal clearance, work authorization, utility approval, or safe approach distance for a specific job.
clearance zone
Where clearance risk appears
The visual map separates worker approach, equipment movement, building projection, and service attachment questions.
Approach distance must be checked before work.
Swing radius creates a larger hazard envelope.
Fixed projections can trigger utility clearance review.
Do not infer safe approach from this chart.
Decision table
Show where clearance questions arise before work near overhead powerlines or service drops.
Scroll sideways to keep row labels aligned with hidden columns.
| Condition | Chart reading | Next check | Boundary |
|---|---|---|---|
| Ladder or scaffold near lines | Treat as a powerline safety review | ESA or provincial safety guidance | No safe approach authorization |
| New building projection | Check fixed utility clearance diagrams | Local utility service guide | No design approval |
| Service mast or attachment | Utility service rules can apply | Service connection process | No connection approval |
| Mobile equipment near lines | Plan movement envelope, not just final position | Qualified safety plan | No work procedure |
Notes
- Treat this chart as a planning and conversation aid only.
- Confirm current utility requirements, product markings, manufacturer instructions, and local authority requirements before field work.
- Use the linked calculator or table when the task needs project-specific arithmetic.
Source links
Open the underlying public sources before treating the chart as project guidance.