grain Posted March 3, 2009 Share Posted March 3, 2009 This is really a design question to any electrical draughters out there: A communal corridor has three separate lighting circuits. On the same 3 gang switch there are two way and three way switches. Next to the symbol of the 3 gang switch for which I use three 'prongs' what number should I put. Quote Link to comment Share on other sites More sharing options...
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