How many extension cords can you string together?

ScottG wrote:
I would monitor the voltage while ht e AC is running. Shut it down if too low.

I have an AC Voltage Line Meter, so I will do that for sure

ScottG wrote:

Also check all the connection points at the ext. cords from time to time for excess heat.

I assume that excess heat at the connection points is a sign that the voltage is too low? That's one reason why I'm using a dogbone instead of those cheap adaptor plugs that DO get HOT.