![]() The energy loss equals the current squared, times the impedance. The impedance causes energy loss when current flows through the wire. With proper wiring, impedance can be managed. These two properties combine to create Impedance (Z), which is the AC Resistance. It also increases with length (which is not linear). As the diameter decreases, the inductance increases. Its value (in Henrys) depends on the diameter and length of the wire. Inductance is a property all conductors have, which is caused by the changing nature of the DCC signal. As the diameter (area) decreases, its resistance increases. It is linear in nature, as the length of a wire increases so does its resistance. Resistance is determined by the conductor's gauge and length. Two issues with respect to DCC Power Bus wiring: It's cheaper to do it right the first time than it is to tear it out and do it over! A small table top layout can reduce these sizes slightly without problems, but larger home or club layouts should adhere to these suggestions - you'll appreciate it in the long run. Keeping these factors in mind, it is clear a heavier gauge of wire will be required. In addition, a voltage drop of only two volts is a big issue with Digital Command Control, as compensation is not possible by opening the throttle. The resulting electrical loads increase for a given layout. Can You Use Wire Which Is Too Heavy?Įxperience demonstrates that since you can run more trains with more locomotives using Digital Command Control, you will. loss of control or damage due to shorts not being detectedīasic Rule: The DCC Signal will seek out the path of least inductance. Poor wiring can result in runaway locomotives.Wires which are too small may be a fire hazard when used with high current boosters (8 or more amps).Consists or multiple trains in the same Power District will run at reduced speeds if the wiring is inadequate.Trains will run slower in areas which are poorly wired.The amount of power available to locomotives will be reduced if inadequately gauged wires are used.Power Bus wires must be the correct size (gauge).5.4 Don't Place Feeders at the End of a Short Section.3.2.1 Metric Equivalents to American Wire Gauge.3.1 Wire Size Table, American Wire Gauge.2.3 Proper Operation of Overcurrent Protection Devices.2.2 Can You Use Wire Which Is Too Heavy?.2.1 Selecting an Appropriate Wire Gauge.
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