Anything smaller than 22 is a pain to work with.
Thats really good advice as smaller wire can be fragile. However it is not uncommon these days to see some low current signal lines as AWG 24, particularly with some high density D subs. The normal D sub pins are for 20 to 22 AWG wire. Only some high density ones use 24 ga pins.FWIW MIL-W-5088L "Wiring, Aerospace Vehicle" Paragraph 3.8.8 says "This specification permits the use of size 22 wires as the minimum wire size for airplanes, helicopters, and lighter-than-air vehicles, and prohibits size 24 and smaller gauges."
Obviously we aren't bound by MIL SPECs but I still think it is good advice.
AFAIKThats really good advice as smaller wire can be fragile. However it is not uncommon these days to see some low current signal lines as AWG 24, particularly with some high density D subs. The normal D sub pins are for 20 to 22 AWG wire. Only some high density ones use 24 ga pins.
Ray Allen sells 5-wire cable 24 awg unshielded Teflon insulated.For the most part, I will not buy wire for aircraft use less than 22 AWG. The only exception to that is the CABLE sold for Ray Allen servos that Mike S talks about. IF there was a multi-wire cable that I could get in 22 AWG, I would use it instead.