Roger that
so, in conclussion it appears you think its ok to route it in the bundle to the wing.
Conclusion correct!
Wires that cause or "send" out RFI (radio freq interference) tend to have a current that varies at some frequency, not a constant DC "
resistive" load, like a little heated pitot. Also we are talking DC not AC, so there's no AC hum from a pitot supply wire. My story and I'm sticking to it.
Side note: Electromagnets (like a motor) are "
inductive" loads and have coils. Switching an inductive load on or off, can "blow back", ie a collapsing magnetic field. These circuits, like the master relay (an electromagnet) need those "fly back diodes". However a "heater" turns electrical energy into heat (not a magnetic field), so a heated pitot is classified as a resistive load. An electromagnet makes a lousy pitot tube and a heated pitot a lousy electromagnetic.
To be fair a heated pitot might be a little of both load types. At first it might act as a inductive load, but as the element heats, it becomes resistive. It's a grey area, but the rule is, if it causes a magnetic field its "inductive" (motor); if electrical power is turned into a different kind of energy (heat), it's resistive.
Non Sequitur:
Q: Why heated pitot? Do you really need it? It's just my pet peeve, VFR pilot and planes with heated pitot tubes; I'm not criticising only saying are you going to get any use out of it. IFR, yea sure. I have meet a few builder that felt they needed it because the C-172 they learned in had it. It's not a total waste just not something that's strictly needed by FAR's or for VFR operations. If you are a VFR pilot/plane and get into icing you have other problems.