The longer the wire, the more voltage you can lose through resistance and heat. The distance your wire needs to go can impact the gauge size you need. To determine the gauge wire you need, consider what carrying capacity and amount of current the wire needs to conduct to work for your application. Choosing the Right Wire SizeĬhoosing a wire size will depend on the gauge and length you need. Essentially, a thicker wire will have less resistance and carry more voltage at a longer distance. If you measured the resistance at different frequencies, you’d find that the resistance increases as frequency increases. Resistance acts upon both a direct current and alternating current to create a “skin effect.” Simply put, as a signal frequency increases, the current flow of the wire concentrates toward the skin (outside) of the conductor. AWG and ResistanceĪWG is also related to resistance. This is why AWG wires are always slightly bigger in diameter than solid wire. While you can tightly wind or braid wires, there will always be some type of small gap between the strands. Since smaller gauge sizes are more durable and flexible, it’s common practice to use them with higher AWG numbers when stranding conductors for bending or vibration applications. As a general rule of thumb, the higher the AWG number, the smaller (or thinner) the wire will be. In fact, jacketing and insulation are not size determining factors of AWG. Such measurements are made on only the wire and not on the wire’s jacketing or insulation. Circular mil is the area of a 1/1000 (or 1 mil) diameter circle. Oftentimes the term “circular mil” is used. AWG is determined by first figuring out the radius of a wire squared, time pi. Since 1857, wire gauge to MM2 made determining a wire’s current-carrying ratings easier. Request A Quote PowerFlex Subscribe To Email AWG to MM2 Explained Wire Size Conversion Chart - American Wire Gauge to square millimeters The table below illustrates the conversion of AWG to MM2 (or MM2 to AWG) for easy conversion of wire gauge to mm2. As a general rule of thumb, for every 6 gauge decrease, the wire diameter doubles, and every 3 gauge decrease doubles the cross-sectional area. standardized wire gauge system used to note the diameter of rounded, non-ferrous electrical wiring. Toggle Sub-Nav Wire Gauge Size Chart: American Wire Gauge (AWG) to Square Millimeters (MM2)Īmerican Wire Gauge (AWG) is the U.S.
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