05-21-2009, 01:05 PM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 4,981
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Electric furnace
The larger area are your heat elements. the whitish circles are the element overloads. these are wired normally closed. the wires grouped together are the common(s) to all heater elements and go to one terminal on the main bus. The sequencers are wired into a control circuit somewhere else. as more heat is needed a sequencer will turn on and in turn turn on an element. look to the diagram under all the wires. it'll give you some idea of how this panel is wired.
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