I too thought of the main power.
With the heat so high, and the power coming into the plant, or facility can drop considerably. We had a machine that went through this... what we did is put in an Auto Transformer, which will always provide the proper voltage, no matter what the input power supplied. Of course it will need to be rated for the Voltage and Wattage needed... by the machine.
In another factory we put in a power conditionner, which is a little more sophisticated of a solution.
I like it, that you are starting at A and going to Z.... very wise approach.