The answer to 'rewiring gets hot' is that a rewiring job that gets hot is typically caused by improper wiring, faulty connections, or overloaded circuits. Symptoms may include the wires or outlets feeling warm to the touch, flickering lights, or tripped circuit breakers. Solutions can include tightening connections, replacing damaged wires, and ensuring the electrical load is within the capacity of the circuit.
If the rewiring continues to get hot, it's best to call a licensed electrician to inspect the work and make necessary repairs. Attempting to fix a hot rewiring job without proper electrical expertise can be extremely dangerous and should be avoided.