16th Edition (reference only) – NOW superseded by the 17th Edition IEE Regulations.

chapter 5

chapter 6

Special Installations
  --1. - Introduction --2. - Bath tubs and shower basins
  --3. - Swimming pools --4. - Sauna rooms
  --5. - Installations on construction sites --6. - Agricultural & horticultural
--7. - Restrictive conductive locations --8. - Earthing for function & protection
--9. - Caravan, motor homes, caravan parks 10. - Highway power & street furniture
11. - Heating appliances & installations 12. - Discharge lighting
13. - Underground & overhead wiring 14. - Outdoor installations & garden buildings
15. - Installations of machines & transformers 16. - Reduced voltage systems
17. - Marinas 18. - Medical locations
19. - Exhibitions, shows and stands

7.3.1 - Introduction

People using a swimming pool are often partly unclothed and wet. The absence of clothing (particularly shoes) will remove much of their protection from shock (see {3.4}), and the water on their skin will tend to short circuit its natural protection. Thus, such people are very vulnerable to electric shock due to their reduced body resistance, so special measures are needed to ensure that the possibility of contact (either direct or indirect) is much reduced. Only separated extra-low voltage (SELV) equipment may be installed, other than water heaters in zones B and C, and equipment specially designed to be safe in the vicinity of swimming pools.

Special Regulations for electrical installations in swimming pools are new in the 16th Edition. Guidance Note 7 makes it clear that the basins of fountains intended to be occupied by persons (becoming quite common in some leisure applications) are subject to the same regulations as swimming pools; in fact the relevant Chapter in the note is titled "Swimming Pools and Fountains". Where it is not intended that people should occupy the basin of a fountain, requirements are relaxed as detailed at the end of 7.3.2. The Regulations classify zones around the pool, the arrangements being as follows:

Zone A
is the inside of the pool, including chutes and flumes, as well as apertures in the pool walls
and floor which are accessible to the bathers.

Zone B
is a volume above the pool to 2.5 m above the rim, plus the same height above the surrounding floor area on which people may walk, extending horizontally 2.0 m outwards from the rim. If the pool rim is above the surrounding floor level, the zone extends 2.5 m above the rim. Where the pool is provided with diving or spring boards, starting blocks or a chute, the zone also includes the volume enclosed by a vertical plane 1.5 m from the edge of the board and extending upwards to 2.5 m above the highest surface which will be used by people. or by the ceiling if there is one.

Zone C
is the volume extending 1.5 m horizontally from the boundary of Zone B and 2.5 m vertically above the floor.

The extents of the three zones are shown in {Fig 7.3}. Although limited by walls or fixed partitions the zones do extend through doorways and other openings.

Fig 7.3 Dimensions of zones for swimming pools


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Extracted from The Electricians Guide Fifth Edition
by John Whitfield

Published by EPA Press Click Here to order your Copy.

Click here for list of abbreviations