How can I terminate a wire passing 32A

Question

I have a cable with 3 X 10 AWG stranded conductors, L1, L2 and Earth. This cable will need to pass 32 amps of continuous current for 24+ hours at a time. I have this contactor:

As you can see, the contactor has box screws (is that what they are called?) and I intend to use them as the UL standard for "faston" (quick connect) crimp terminals won't allow for more than 25A continuous through a yellow terminal. Actually, maybe someone could confirm this for me?

I feel a bit cheap shoving the AWG 10 stranded wire into the hole and clamping it down with the screw. I realize this may actually be the best method, but I am wondering if there is a cleaner, safer alternative.

I thought of using something like this but for the life of me, I can't find a current rating. I can't even find a confirmation that it will handle as much as the conductor it's crimped to. Also, I'm not sure that this would create a better contact in the contactor than just bare wire...

I would appreciate any insight! Thanks!

Answer 1

Two solutions exist:

Use multiple 90 degree angled quick connect terminals and put them in a row onto the same wire.

From TE Connectivity

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Use a crimp terminal that looks like a long narrow flat bar with or without a short 90 degree bend at the tip and screw that into the screw terminal. I'll try and find their formal name. They are called "flat blade" terminals or "PIDG tabs".

From TE Connectivity

From TE Connectivity

Personally, I wouldn't be too worried going from 25A to 32A as long as it was made of copper (and not steel), especially if you used a non-insulated crimp terminal without any plastic to melt. But if it is running 24 hours, I understand since no one will be around to see anything go wrong.

I tend not to worry about current ratings of a connector too much if it is all metal (no plastic to melt), is all copper, and looks to have the same cross sectional area and contact area of the copper wire it is connecting to.