Horticultural installations

Do I need to consider any special regulations such as those required by agricultural and horticultural installations, swimming pools or flameproof installations ... 

Earth electrodes connected to the earth terminal of an electric fence controller must be separate from the earthing system of any other circuit and should be situated outside the resistance area of any electrode used for protective earthing. The electric fence controller and the fence wire must be installed so that they do not come into contact with any power, telephone or radio systems, including poles. Agricultural and horticultural installations should be tested and inspected in accordance with Part 6 of the Wiring Regulations every three years. 

Figure 5. The above concrete unit as installed at the I.S.U. Horticulture Station as a small quantity disposal unit.

Cables buried on agricultural or horticultural land should be buried at a depth of not less than 600mm, or 1000 mm where the ground may be cultivated, and the cable must have an armour sheath and be further protected by cable tiles. Overhead cables must be insulated and installed so that they are clear of farm machinery or placed at a minimum height of 6m to comply with lET Regulation 705.522. 

State five regulations which are specifically relevant to special installations or locations on horticultural premises. 

Some installations require special consideration because of the inherent dangers listed above. Installations requiring special consideration are flameproof installations, construction sites, agricultural and horticultural buildings. All of these installations are described in detail in Part 7 of the lET Regulations and some are described in Chapter 4 of this book. 

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