Table 57. Copper wire resistance. 





Resistance of standard copper wires 





in milliohms (ohms times 10 3 ) per 

 meter at 25°C (77° f) 





Common Use 



Wire Size (AWG) 





Impressed Current 



4/0 



0.167 



Anode Installations 



3/0 



0.211 





2/0 



0. 266 





1/0 



0.335 





1 



0.423 





2 



0.531 





4 



0.850 





6 



1.35 



Galvanic Anode Installation 



8 



2.15 





10 



3.41 



Substructure Test Stations 



12 



5.41 





14 



8.60 



Instrument Test Leads 



16 



13.7 





18 



21.9 





20 



34.8 





22 



55.8 



Temperature Correction Factors 



TemDerature 







u c 



°F 





Multiply Resistance at 25 C by: 







32 





0.901 



10 



50 





0.941 



20 



68 





0.980 



. 25 



77 





1.000 



30 



86 





1.020 



40 



104 





1.059 



(b) for zinc: 



anode weight 

 . ' . „ 0.009 5 • in newtons • efficiency • utilization factor 

 anode current in amperes 



Ccl for aluminum (Galvalum II alloy) in seawater: 



anode weight 

 . _ 0.035 ♦ in newtons • efficiency • utilization factor 

 Lite in xears - anode current in amperes 



367 



