CP 420, Part 1, Chapter 15
INTRODUCTION This chapter defines clearances for overhead lines on wood poles and narrow-based lattice steel towers. It is divided into sections according to the type of clearance under consideration.
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This chapter deals with cables on land, exceeding 220 kV, both AC and DC. The scope is to give an overview and comparison between Overhead Lines (OHL) and Underground Cables (UGC)
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Technical Guidance Note 287
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Safe Approach LIMITS to Energized Electrical Conductors for Persons
Note: Table 1 shows only common voltages and rounds them up to the nearest foot. MSHA requires mining operations to meet 30CFR56/57.12071 when it comes to approach distances to overhead
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In addition to the two main components, some Overhead Line Routes carry a Fibre Optic cable between the towers with an final underground connection to the Substations. In most cases, National Grid''s
NSP/004/011
The purpose of this document is to specify the minimum clearances between overhead lines at all voltages up to and including 132kV and ground, general obstacles, railway and waterways property