So by Servo's, you mean RC servo's.!

 

So by Servo's, you mean RC servo's.!

So by Servo's, you mean RC servo's.!

Yeah sorry mate, as I said I have very little experience working with actuators. I think only one of them is an RC servo. So what difference does this make in terms of the wiring and EMI?

 

just that servo's to me are industrial robotic and CNC versions, at least the RC versions are built a little sturdier as to not requiring feedback and so sensitive wiring techniques.

 

That must be a rather small robot arm to be running on 5 volts.
The smallest robot I have programmed was powered by 20 amp/208 volt 3-phase power. The joint motors were AC servo types, brushless 3-phase variable speed.

 

The OP's sounds bigger than these :!
Northwest University have produced a robot small as a flea!
Just a half-millimeter wide, the tiny crabs can bend, twist, crawl, walk, turn and even jump.
The researchers also developed millimeter-sized robots resembling inchworms, crickets and beetles.
Although the research is exploratory at this point, the researchers believe their technology might bring the field closer to realizing micro-sized robots that can perform practical tasks inside tightly confined spaces.

 

That must be a rather small robot arm to be running on 5 volts.
The smallest robot I have programmed was powered by 20 amp/208 volt 3-phase power. The joint motors were AC servo types, brushless 3-phase variable speed.

Well this is a kind-of school project (not really, it's under a robotics club) so we are keeping it relatively low-scale. The idea is to get a nice amount of precision on it more than anything else.

 

OK, I was thinking about the small "MotoMan" (YASKAWA) robot arm that I programmed to exercise a turn signal switch for a customer.

 

We plan on using 7 servos - 2 20kg-cm servos (2.7 A each), 1 40 kg-cm servo (≈ 4 A), 1 6kg-cm servo (1 A), 3 microservos (0.8 A each), hopefully controlling them using a Raspberry Pi Pico (if possible) or Raspberry Pi 4. Now I don't have any specific details on the longest leads but I could see the longest reaching MAX 60-70 cm. These wires will likely be 14 AWG in accordance with current ratings.

You don't need to use 14AWG wire for the power. It has a resistance of 2.58mOhms/ft. At stall current of 2A, the wiring will drop the voltage by 5.16mV/ft which is negligible.
22AWG has a resistance of 16.5mOhms/ft. At 2A, it will drop the voltage by 33mV/ft which is still insignificant.

 

The NEC current rating for wires is based on constant current and heating (temperature rise. So for a robot that that is not moving constantly you can use thinner wire with the size determined by the voltage drop. And I suggest using "SuperFlex" type wire for much longer life before failure from flexing.

 

The OP doesn't appear to be designing for Industrial standard & environments ! , This appears more of a DIY RC hobby style unit.