"C J Campbell" wrote in message
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"Richard Kaplan" wrote in message
s.com...
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| "Dan Luke" c172rgATbellsouthDOTnet wrote in message
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| Then have two.
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| When you are IMC with smoke in your cockpit, how do you know which
| electrical system to shut down?

You shut down both of them and wait for the smoke to clear. Then you
cautiously turn them on one at a time and see which one produces smoke.

Or your observe your panel status lights to determine which is having bus
problems, then shutdown the inop one.