Carvin Guitar Wiring Schematic A guitar pickup is actually much like a powerful microphone coil. For many years, powerful microphones have been wired with the voice coil attached with the principal of the microphone's transformer, and perhaps not recommended to surface (‘floating'). The microphone's situation is usually attached to the cable shield, which will be connected to the microphone amplifier's ground (see Rane's website for more discussion).
By and big, powerful microphones are very calm devices as a result of the mixture of transformer isolation and healthy, suspended sign lines during, in addition to protected, humbucking coils.
Therefore why not guitars? Instruments are once affected by noise. Humbucking pickups are only an incomplete (though essential!) solution. Well-known answer is to float the guitar pickup to a balanced production, being a microphone. An identical strategy was printed this 2001 patent application like this Carvin Guitar Wiring Schematic?