I just had 2 of these 30 amp 240 volt lines with 10 gauge wiring installed and running the APC 9571 PDU on each of them. This past weekend when the temperatures got in the 80s the circuit breakers got really warm (I could still hold my hand to them, but barely) to the touch and the plugs at the wall were each very warm. Should I be worried about this? I can't imagine what will happen when the temps get up to 100 degrees. Now that it's cooled off again everything is nice and cool. I'm running 19 amps on each one.
19amps? as in you measured it?
Also, What does the outdoor temp matter? Do you not air condition your house?
Yes I measured it with one of those things with a claw that goes over the wire and tells you the amperage. The fuse box is outside and I set the AC to 85. How does any of this help answer my question?