Who Makes a Reliable Electrified Hinge?

I've recently completed a huge installation that had a large number of electrified hinges. A large percentage of them failed very quickly after installation, or at the time they were installed. The problem I had was that the conductors would short to the hinge, or ground in metal frames.

Can you recommend a reliable hinge to use? I use normal and heavy hinges for my installations.

Thanks in advance.

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