What would likely happen if someone came in contact with a current above 20 milliamperes?

Contact with a current above 20 milliamperes can be very dangerous and potentially fatal. At this level, electrical current can interfere with the normal electrical signals in the heart, leading to arrhythmias or cardiac arrest. The human body is sensitive to electrical currents, and even relatively small amounts can be harmful depending on various factors including the path the electricity takes through the body, duration of contact, and individual health conditions.

While lower currents can cause sensations such as minor shocks or muscle contractions, crossing the threshold of 20 milliamperes significantly increases the risk of severe consequences, including the possibility of death. Thus, it's crucial to recognize that safety precautions must be taken seriously when working around electrical systems to avoid exposure to harmful currents.