04 amp to volt12/2/2023 ![]() – Here is a guide to electricity and its effects on the heart with some safety tips. Most of the electrical work we do is on systems that will happily fry us to a crisp before the power supply cuts out.Ī circuit breaker or fuse will never protect us because we draw in the milliamp range when we are shocked, and almost all fuses or breakers don't trip or blow until much higher levels are reached.īe safe around high voltage and keep your resistance high. Unfortunately, those sorts of quick high voltage discharges aren't the big danger we face in our profession. This means that while the voltage is high, it is only high for a very short period. In these cases, the power supply is either limited, intermittent, or instantaneous. Some people may bring up high voltage shocks from a taser or static electricity as proof that “voltage doesn't kill.” The higher the voltage, the more diligent you need to be. These all serve to keep the resistance up to reduce the likelihood of a fatal shock. This is why working around live electrical should only be done with insulated tools, proper PPE, and in dry conditions. It becomes clear pretty quickly that higher voltage does lead to more dangerous shocks, as does the path's resistance. Let's say that a particular shock is traveling through a 20-kiloohm (20,000-ohm) path in your body. †Differences in muscle and fat content affect the severity of shock. *Effects are for voltages less than about 600 volts. When you increase the voltage, you ALSO increase the amperage. While the resistances vary based on these factors, Ohm's law still holds true. The resistance (ohms) of the human body depends on many factors, including things like the moisture content of the skin, what other objects the current path is traveling through, which path the current is taking through the body, etc. This statement about amperage being the real danger has led to many people inaccurately believing it is the size of a panel or the gauge of wire that makes something more or less dangerous-which is 100% incorrect. BOTH of them are needed to cause injury or death, and in the case of voltage and amperage, the higher the voltage, the higher the amperage. OK, so that's a pretty bad example, but hopefully, it gets the point across. While there is truth to the statement, it is sort of like saying, “It's the size of the vehicle, not the speed that kills you when it hits you.” It's the amperage that kills you, not the voltage.
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