In front of the 3CDRS marking, there should be a an insulation designation like TW, THHN, XHHW, THWN, etc. The insulation is what is going to determine the current rating of the wire - the various insulations are rated for different temperatures, and that will dictate the amount of amperage that the wire is rated for.
#6 aluminum wire is rated for a maximum of 40-60 amps depending on the insulation. A search showed that "3CDRS" is frequently used on XHHW wire, and that is rated for a maximum of 50 amps. There is no guarantee what your wire actually is unless you can find the marking.
For the 99% of all applications that you will be using this for the maximum OCP would be based on the 60 degree column. For the #6 aluminum it would be 40amps.
David
TMEL 32507
Master electrician
I'm interested to hear what you base this on.
I'm a now-retired industrial electrician and have seen very, very little 60° rated wire since the late '70's. TW is as dead as disco. In my experience, 75° and 90° are overwhelmingly the most frequently found, and a look at Home Depot's offerings validate this.
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Anyone have a good, reliable Solid State Relay that they are using?
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