WASHING MACHINE AC CIRCUITS DO NOT USE GFI'S.
Wrong again pal, it is required. Read it and apologize to everyone, NEC 210.8(A)(10). Been that way since 2014. If you had said install between Line and Neutral is fine. All you are doing is injecting noise onto ground conductors where they do not belong. Your advice is dangerous intentionally injecting 60-Hz line current into equipment grounds.
210.8(A) Dwelling Units. All 125-volt, single-phase, 15- and 20-ampere receptacles installed in the locations specified in 210.8(A)(1) through (10) shall have ground-fault circuit-interrupter protection for personnel.
(10) Laundry areas.
I will stand by my original posting.
GFI units to be installed in the laundry area are meant to protect outlets in a general wet area such as a sink. Like a kitchen or bathroom. The exact definition can be reviewed at the link below.
https://www.electricallicenserenewal.com/Electrical-Continuing-Education-Courses/NEC-Content.php?sectionID=808.0The gray area is what constitutes a wet area. It is generally considered GFI’s should not be installed in an area where the reset button is inaccessible.
This law is relatively new and is still under interpretation by local and state agencies. The actual law was generally introduced in 2017. Now there is no requirement for GFI’s in a laundry area for home build before 2017. This means 98% of homes will not have any issue with GFI’s on an electric dryer or washing machine.
As for my posting on the RF bypass capacitor, I will stand by my solution. The amount of 60 Hz AC ripple placed on the ground common return is minuscule compared to the IR drop from the motor and high current electronics. The requirement is to prevent RF from getting into the control circuitry. Placement of type 31 mix RF toroid’s to reduce common mode RF on the AC feed will never be as efficient as a couple of RF bypass capacitors.