I have never heard of Generac selling a special cable. As others have said you can use TC.
I'm not sure why people get so hung up on using a cable for the control wiring. I have always used #14 stranded THHN/THWN. Its much faster than making a special trip to the supply house to get a custom cut. Even if I only have 1 roll of #14 I can real off 6 cuts in a few minutes.
Why make a special trip to the supply house? I'm sure there are other items you need to pickup at the supply house for standy generator installations, why not get the TC cable then? Or use the link I posted and have it delivered to your shop. How did the #14 THHN get on your truck? Use that same method to get the TC cable :thumbsup:
I've used your proposed method of #14 THHN on many generator installations before I learned of using TC cable. Using #14 THHN costs more money and takes more time. Having to label 6 wires separately and then having to deal with them twisting up as you pull 6 pieces off a single real is a waste of time. Even if you have 6 different colors, setting up the reels is a waste of time. Pulling a single TC cable into the raceway is much easier, I can tell you that from direct experience since I've done it both ways a couple dozen times each. I will never go back to #14 THHN, it would be throwing money away.
If you are planing to pull a cable in the same conduits as your feeds you will need to up size your conduit considerably.
With all due respect, I just can't see how this is true.
Your conduit fill is based on the overall dimensions of the cable not the 6 individual wires.
This a theory, please tell us the real world experiences you had in which you had to "up size your conduit considerably". I assume "considerably" means at least 2 trade sizes, right?
In my experience, I have never had to upsize the conduit at all. For example, for the typical 20kW installation that I usually do, I use the same 1 1/4" PVC that I have always used (and everyone else seems to use too). The TC cable with an O.D. of
0.360" fits just fine with (3) X #4 and (1) X #8.