Schedule 4 distances
Keep 7 m until the voltage is known.
| Voltage (phase to phase) | Distance |
|---|---|
| 0 to 750 V (insulated) | 0.3 m |
| 0 to 750 V (bare) | 1.0 m |
| Above 750 V to 40 kV | 3.0 m |
| 69 kV to 72 kV | 3.5 m |
| 138 kV to 144 kV | 4.0 m |
| 240 kV to 260 kV | 5.0 m |
| 500 kV | 7.0 m |
| Unknown | 7.0 m |
Crane basics
Alberta OHS Code Part 6 and CSA Z150.
| Check | Why |
|---|---|
| Load chart | Capacity by radius and configuration |
| Ground and outriggers | Support the load |
| Signaller | When the operator cannot see |
⚠️ Reference only. Always verify against the manufacturer's specs, your jurisdiction's code and your site's procedures.