Yes, but for flexibility you also want a softer more flexible insulation and sheath. If the flex may get hot then you will need a heat resistant sheath eg butyl.
Arctic cable as used for portable equipment on building sites is designed to remain more flexible at low temperatures
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cable is more flexible than ordinary PVC
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the top right of all the TLC pages is the "part of ... range" which will lead you to other products in the range)
We discussed this quite recently in a thread "extra flexible main lead"
I get the impression that there is a little more to this question than we have been told. Without knowing what you have in mind, many of the useful suggestions will be inappropriate.
One factor to bear in mind is that if you choose two core flat cable, it doesn't handle anything like as well as three core does when you coil it up and then uncoil it for use the next time. It soon acquires a very pronounced twist to it.
That may be an issue for you, or it may be of no consequence at all, but I've seen examples of where round three core cable has been used instead of flat two core, simply for the better way that it handles.
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