Inverting limit switches and pull down resistors

I understand that the limit and homing switches work better if they are wired as normally closed instead of normally open. The wiki on the cnc xpro v2 board states that a pull down resistor needs to be in the circuit to keep from burning out the limit switches. My question is would a heavy duty switch negate the need for the pull down resistor. If not, what size resistor needs to be in the circuit.My Z axis worked fine without inverting the limit switch but when I installed the limits on the Y axis I kept getting alarms.