I am looking at how new systems are retrofitted in aircrafts (large business jets or airliners), and I was wondering where the mechanics can get access to electrical power.
More specifically, I know that there is an electrical cabinet close to the cockpit, but are there any accessible AC buses elsewhere in the aircraft (for example, so that you don't have to run wires all the way back if you install something near the empennage)?
Thanks for your help!