10.1 Requirements for Working Near Cables
Warning
Do not operate the platform near cables. Maintain the required safety distance.
Nominal Voltage and Distance from the Ground or Floor
| Nominal Voltage | Distance from the Ground or Floor (m) |
|---|---|
| 50 < U < 1000 | 2.30 m |
| 1000 < U < 30000 | 2.50 m |
| 30000 < U < 45000 | 2.60 m |
| 45000 < U < 63000 | 2.80 m |
| 63000 < U < 90000 | 3.00 m |
| 90000 < U < 150000 | 3.40 m |
| 150000 < U < 225000 | 4.00 m |
| 225000 < U < 400000 | 5.30 m |
| 400000 < U < 750000 | 7.90 m |
10.2 Wind Speed Limit Requirements
Warning
Platform operation is strictly prohibited when wind speed exceeds 45 km/h.
Note
The following wind force levels provide an empirical reference for wind speed evaluation.
10.3 Beaufort Wind Scale Reference Table (Wind Speed Measured at 10 m Above Ground)
| Wind Force | Wind Type | Wind Speed (knots) | Wind Speed (km/h) | Wind Speed (m/s) | Effects on Land | Sea Conditions |
|---|---|---|---|---|---|---|
| 0 | Calm | 0 – 1 | 0 – 1 | <0.3 | Smoke rises vertically. | Sea like a mirror. |
| 1 | Light Air | 1 – 3 | 1 – 5 | 0.3 – 1.5 | Smoke drifts with the wind. | Rippled with the appearance of scales; no foam crests. |
| 2 | Light Breeze | 4 – 6 | 6 – 11 | 1.6 – 3.3 | Wind felt on the face; leaves move and may fall. | Small but distinct wavelets. |
| 3 | Gentle Breeze | 7 – 10 | 12 – 19 | 3.4 – 5.4 | Leaves and small twigs are in motion. | Large wavelets; crests occasionally show white foam. |
| 4 | Moderate Breeze | 11 – 16 | 20 – 28 | 5.5 – 7.9 | Dust and loose paper are raised; small tree trunks sway. | Small waves with more frequent white crests. |
| 5 | Fresh Breeze | 17 – 21 | 29 – 38 | 8.0 – 10.7 | Leafy shrubs sway. | Moderate waves take shape; white foam crests form and occasional spray appears. |
| 6 | Strong Breeze | 22 – 27 | 39 – 49 | 10.8 – 13.8 | Large branches move; overhead wires whistle; umbrellas are difficult to use. | Large waves form; white foam areas increase and spray begins to appear. |
| 7 | Near Gale | 28 – 33 | 50 – 61 | 13.9 – 17.1 | Whole trees sway; walking against the wind is difficult. | The sea heaps up and foam is blown in streaks along the wind direction. |
| 8 | Gale | 34 – 40 | 62 – 74 | 17.2 – 20.7 | Small branches break; progress against the wind is difficult. | Moderately high waves with breaking crests. |
| 9 | Strong Gale | 41 – 47 | 75 – 88 | 20.8 – 24.4 | Chimneys, roof tiles, and similar parts may be damaged. | High waves; dense foam reduces visibility. |
| 10 | Storm | 48 – 55 | 89 – 102 | 24.5 – 28.4 | Rare on land; when it occurs, trees may be uprooted and buildings damaged. | Very high waves with overhanging crests; the sea surface turns white and visibility is reduced. |
| 11 | Violent Storm | 56 – 63 | 103 – 117 | 28.5 – 32.6 | Very rare on land; when it occurs, it causes major damage. | Exceptionally high waves may hide medium-sized ships; the sea is covered with white foam and visibility is greatly reduced. |
| 12 | Hurricane | 64+ | 118+ | 32.7+ | Causes extremely severe damage. | Air is filled with foam and spray; visibility is very poor. |
