銅排是優良的導電體,其電阻值是極低的。以常見的25X3,30X3,30x4,40X4,40X5,50X5,60x5,60X6,60X8,60X10的銅排為例,其1米的電阻分別為0.233毫歐,0.194毫歐,0.146毫歐,0.109毫歐,0.0875毫歐,0.07毫歐,0.0583毫歐,0.0486毫歐,0.0365毫歐和0.0192毫歐。