What levels of Stray Current are relevant?
Current produces a Magnetic field surrounding the path of the flow. The Earth’s background produces about 500 mG of magnetic field, which is mostly DC except for minuscule ripple on it, somewhere below 30 cycles per second (Hertz (Hz)). This background is essential to life. In contrast, the addition of about 4 mG at 60 Hz, doubles the rate of Leukemia. While the rate of Leukemia is rare, and doubling it still keeps it rare, if it happens to you, all bets are off. If Leukemia is not reached, scores of other disease may become part of your life. So the lower the contribution of Alternating Magnetic fields, the better. If the source produces a wide-area field that you cannot walk away from, you have a real problem. If the source produces a small dimension field such as a small appliance, then its relevance is quite low. Wiring errors and system interconnections can cause wide-area fields, and these can be corrected, by someone who knows what he is doing.
