Electure,
Thank you for the details here. somewhere back in my apprenticeship i was told of the 'six switch' rule.
Where this # came from is debatable, however it was passingly accepted that six would be the max # in an emergency, say the building is on fire and the fire department has responded.
Would'nt the exceptions trash this theory?

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[This message has been edited by sparky (edited 06-17-2001).]