Shutdown for Ender 3, maybe ok for CR10 i haven't test it (you can make a remix^^)

I have used micro switch 3A, you can choose 5A (same size), the max current to cut is ~1.4A (when bed+nozzle heating) but the shutdown is after off bed and nozzle (see g-code).

Adjust the switch position on the profile and glue the switch actionner on the bed fix plate.

My end g-code script :

G28 X0 ; home the X-axis G1 F1800 E-12 ; Retract filament 12 mm to prevent oozing M140 S0 ; turn off bed M104 S0 ; turn off heaters G4 S240 ; standby 240s for cooling nozzle M106 S0 ; turn off cooling fan M300 S2349 P240 ; biiippp M300 S2349 P360 ; biiippp G28 Y0 ; home Y axis G1 Y235.0 F1000 ; Y move +235mm go to switch M84 ; disable motors

• Micro switch 3A or 5A
• 2 screws M3x5 flat head
• 2 T-nuts + 2screws (from stock)

The micro switch is in serial of the stock 230v power switch. Contact NC for the switch

If you like it ;)