This sort of leakage is undesirable because the current flowing through the alternate path can cause damage, fires, RF noise, or electrocution.[2] Leakage of this type can be measured by observing that the current flow at some point in the circuit doesn't match the flow at another. Leakage in a high-voltage system can be fatal to a human in contact with the leak, as when a person accidentally grounds a high-voltage power line.[3]