how sensitive are pace makers ????

I would use a single combined mains inlet / EMI filter

my main concern would be ensuring the lid/ door to the metal enclosure has a metal to metal contact all the way round
(a single earth wire grounding a painted door is not going to keep the EMI from escaping)

and look into filters and or ferrite beads to ensure rf noise does not escape via the motor and control wiring passing through the enclosure

John