Is it legal to make a custom slip ring?

[jvriezen]

Originally Posted by Jon Stratis

The question is... Are two connectors each rated for 30A, placed in parallel, gauged correctly for a 40A branch circuit? I could make an argument in either direction. It really would need a GDC ruling on it through the Q&A.

There is a safety concern in using two connectors. In normal motor circuits, if a wire comes lose, current stops flowing (until the loose wire shorts to the other side of the circuit and trips the breaker). If a connection breaks loose to one of the slip ring connectors, you now have 40A going through the 30A remaining ring -- and things start to heat up -- the slip ring conductor is your breaker, and not a very good one

I'd think that overloading a circuit due to losing half the conductor might have more danger than the lower risk of suddenly shorting something and blowing a breaker immediately.

Disclaimer: I am not an electrical engineer nor an electrician. I occasionally play one on CD. And when inspecting robots, sort of...