Tuesday, February 19, 2019

Chapter 22 - AC versus DC switches/ Documentation


Del City has some overstock toggle switches rated at 20 Amp AC for $.64 each.   I recalled that DC switches were often constructed differently than AC switches and found this informative article explaining the differences:

Switch Reference (An EATON training document hosted on the aerolectric.com site)

"DC CAPABILITY OF AC SWITCHES 

It is important to also note that many AC rated switches can be used in applications where less than 30V DC is required, provided current does not exceed the full current 125V AC rating of the switch. In general, the 125V AC rating would be equivalent to the 28V DC rating."

The article is well worth reading.  Anyway, most of the switches I have will be used on low current resistive loads so isn't a factor.

I spent a good part of the day organizing a sizable pile of documentation for the engine, air fame & prop logs.  Binders were filled with specific information for modifications not in the plans such as the rudder pedals, site gauges, capacitive fuel probes, electric nose lift, hidden rudder bell horns, fuel injection, electronic ignition and quite a bit more.  This task was initiated because I was looking for information on the alternators and this turned into another rabbit hole, probably worthy of a separate blog entry sometime in the future.

I'll print out nice binder labels before the DAR inspection for the binders to replace the temporary sticker labels.   I still have a small pile of unique items that has documentation that will be needed someday.  Probably three more binders for avionics and electrical system will be added to these.  The small EAA Airframe log doesn't seem large enough to record everything.



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