Pools and spas come in every shape and size. Swimming pools range in size from wading pools for young children, to Olympic sized pools that accommodate many people. Spas also come in different sizes and can accommodate many people at a time. They all require some sort of electrical connection to keep the working properly. Electric pumps, filters, heaters, and lighting all play a part in their day-to-day operation and maintenance.
...Source: http://electrical.about.com/b/2014/05/12/swimming-pool-and-spa-hazards.htm
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