Canada–Newfoundland and Labrador Offshore Area Occupational Health and Safety Regulations (SOR/2021-247)
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Regulations are current to 2024-10-30 and last amended on 2022-01-01. Previous Versions
SCHEDULE 1(Section 141)
Approach Boundaries for Alternating Current Systems (distance from energized electrical conductor or circuit part to person)
| Item | Column 1 | Column 2 | Column 3 | Column 4 |
|---|---|---|---|---|
| Limited Approach Boundary | ||||
| Nominal System Voltage Range, Phase to PhaseFootnote for Approach Boundaries for Alternating Current Systems (distance from energized electrical conductor or circuit part to person)a | Exposed Energized Electrical Conductor | Exposed Energized Circuit Part | Restricted Approach Boundary | |
| 1 | Less than 30 V | Not applicable | Not applicable | Not applicable |
| 2 | 31 V – 150 V | 3.0 m | 1.0 m | > 0 m |
| 3 | 151 V – 750 V | 3.0 m | 1.0 m | 0.3 m |
| 4 | 751 V – 15 kV | 3.0 m | 1.5 m | 0.7 m |
| 5 | 15.1 kV – 36 kV | 3.0 m | 1.8 m | 0.8 m |
| 6 | 36.1 kV – 46 kV | 3.0 m | 2.5 m | 0.8 m |
| 7 | 46.1 kV – 72.5 kV | 3.0 m | 2.5 m | 1.0 m |
| 8 | 72.6 kV – 121 kV | 3.3 m | 2.5 m | 1.0 m |
| 9 | 138 kV – 145 kV | 3.4 m | 3.0 m | 1.2 m |
| 10 | 161 kV – 169 kV | 3.6 m | 3.6 m | 1.3 m |
| 11 | 230 kV – 242 kV | 4.0 m | 4.0 m | 1.7 m |
| 12 | 345 kV – 362 kV | 4.7 m | 4.7 m | 2.8 m |
| 13 | 500 kV – 550 kV | 5.8 m | 5.8 m | 3.6 m |
| 14 | 765 kV – 800 kV | 7.2 m | 7.2 m | 4.9 m |
Return to footnote aFor single-phase systems above 250 V, select the range that is equal to the system’s maximum phase-to-ground voltage times 1.732.
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