Tooj liab nickel alloy constantan hlau, uas muajtsis tshua muaj hluav taws xob resistance, zoo tiv taus kub thiab tiv taus xeb, yooj yim ua tiav thiab ua cov hlau txhuas welded. Nws yog siv los ua cov khoom tseem ceeb hauv thermal overload relay, qis tsis kam thermal circuit breaker, thiab cov khoom siv hluav taws xob. Nws kuj yog ib qho khoom siv tseem ceeb rau hluav taws xob cua sov cable. Nws zoo ib yam li 's hom cupronickel.