I need to know the tempeture ratings for old Anaconda Dutrax type nm wire, 14/2 600 volts for a house i'm remodeling. The new light fixtures require a minimum of 90º C and I don't know if this existing wiring will qualify. Thanks in advance.
TBR

NM-B, manufactured swince about 1986, is rated for 90 deg. If there is no "B" on the jacket it is no good.