Wiring large wires

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The electron man

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Electrician
So this is my fist time doing something like this
Would love some feedback on how I did thanks again
 

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Looks good. You should stagger the ins and outs because all of the current is flowing through the small amount of metal between the 4th and 5th conductors.
 
Even though that's better those connectors are 90° rated I doubt the wire is running at 90 probably 75 so I'd guess that this time won't eventually fail from over usage.
The issue is the choke point within the connector. If you look at the second photo in the OP all of the current is passing through the small amount of metal between the 4th and 5th conductors. Given the conductor size that could possibly be up to 800 amps. At least one manufacturer has a note with their product stating that for larger numbers of conductors they must be arranged similar to the photo in post #6 for that reason. I'll see if I can find the documentation.
 
I would have tried to leave more conductor on the top ones, seems a little "bunched up" to me. One thing you can try is to put the connectors oriented vertical instead of horizontal and do a 90 degree turn into the connectors. Sometimes that gives you flexibility and makes things easier.
 
I recall reading an instruction sheet which gave explicit instructions for staggering the conductors. I can no longer find this.

I have 2 relevant documents.

From Polaris, they say that their conductors are tested to work without staggering, but they recommend staggering because it reduces connector temperature.


For Ilsco Nimbus connectors, the catalog says "For multiple inputs, the inputs must be staggered with outputs to allow for ampacities to be additive per NEC Table 310.16 and 310.17" but doesn't detail this staggering the way the original document described

 
I would have tried to leave more conductor on the top ones, seems a little "bunched up" to me. One thing you can try is to put the connectors oriented vertical instead of horizontal and do a 90 degree turn into the connectors. Sometimes that gives you flexibility and makes things easier.
Its 350 al so pretty hard to bend but will keep your tip in mind thanks
 
Maybe with compression fittings, definitely not set screws, his reason is what if you forget to tighten down the set screws? Which I can kind if agree with. We'd have to pull some kind of EGC in that pipe and bond the box.
 
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