Of course the Diameter in Mils and the Cross-section in circular mils are provided at a standard temperature, 20C. Temperatures are given in both centigrade and Fahrenheit. More importantly the table shows Ohms per 1000 feet for the following temperatures 0C, 15C, 20C, 25C, 50C and 75C Along with the diameter and cross-section for each gage. The table above provides data for Gage numbers from quadruple ot to 40 gage. So wire gauge needs to be selected at the highest temperature expected, as far as resistance is concerned.Īs wire resistance increases so does cable heating.Īluminum wire properties Aluminum electrical Wire gauge chart page. Wire gauge standard vs Resistance vs TemperatureĪ larger gauge wire may be required at higher temperatures to sustain the same wire resistance. Use these guidelines for Cable Derating to insure the cable functions over the proper temperature range. Of course the table below shows the actual values as they change over temperature. However the point of the table is to quickly show how the resistance varies. When you compare the table above with the AWG table below small resistance values may be noticed. More than any other wire size 24 gauge is used by a vast number of electrical interfaces. Interface Buses are #22AWG, #24AWG, #26AWG, and 30AWG. The first Table shows wire gauge vs resistance per 1000 feet.Ī fast and easy way to see the wire resistance changing as the wire gage changes. ![]() A quick reference guide to cable resistance for the American Wire Gage.
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