
This is the most convenient and reliable aluminum to copper connector I have ever used. You can be assured of a reliable connection, indirectly through a device that does not allow fire. And if you somehow manage not to tighten the connector tight enough, it will melt into (individual) wires and smother any resulting flames. This works by inserting each wire into a separate niche and tightening it with a screw on the connector frame. Each niche has a corresponding conductive slime. They then close the top to prevent sparks from being created in the plastic which would then melt onto it.

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