We recently upgrade our electrical panel and re-wire the electricity. We notice that an area in the attic is with crowded wires, and wonder if this would be an potential safety issue because the heat generated by the wires.

City inspector does not address this condition. We feel unease about it, and would like to know whether this is really safe. Thank you!

Some photos are added.

Photo 1: The wires run up from the panel (back of the wall) to attic.

Photo 2: follow the wires in photo 1 into the attic. It's crowded, and may become even more crowded when insulation is added. (The space between the roof and attic is quite small. That might be the reason why it's crowded.)

Photo 3: extended wires in Photo 2. The wires are less crowded and run to different areas of the house. It can be noticed that the wires are not "parallel", some run above or underneath the others.

Photo 4: further extended wires in Photo 3

Photo 5: Further extended wires are well-spaced.