The euro is the official currency of Portugal, which is a member of the European Union. The Euro Area refers to a currency union among the European Union member states that have adopted the euro as their sole official currency.
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Instead, groups of floodlights are wired through large (really large) contactors. The contactors can then be triggered by a lowly 120V circuit and a toggle switch although in reality a stadium would used something more sophisticated. Contactors are used in many applications, not just lighting. Your car probably has over 40 relays which are small contactors and large motors used in industry are switched by contactors. I hope that helps. Unless you need additional info, please click ACCEPT to close our question/answer session.