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Old 10-27-2021, 07:24 PM   #1
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Electrical terminal blocks

I need to replace my EMS and auto transfer switch combined unit with a separate EMS and ATS. The current wires coming from the generator and shore power are not long enough to do this without adding terminal connectors. Does anyone have a source for these. I need them to be as small as possible and able to handle 50 amps.
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Old 10-27-2021, 07:33 PM   #2
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https://www.amazon.com/Morris-97103-...a-568414130293
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Old 10-28-2021, 04:55 AM   #3
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Thanks Brian.
I think I need a splice connector that is suitable for #4 AWG. It's unclear to me if the one you suggested will handle that size wire.



Also does anyone make an insulated 4 wire connector. Not a multi tap but one for neutral, ground and L1 and L2.
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Old 10-28-2021, 05:10 AM   #4
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Try an electrical supply house.
They carry those.
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Old 10-28-2021, 09:18 AM   #5
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Quote:
Originally Posted by timjet View Post
Thanks Brian.
I think I need a splice connector that is suitable for #4 AWG. It's unclear to me if the one you suggested will handle that size wire.



Also does anyone make an insulated 4 wire connector. Not a multi tap but one for neutral, ground and L1 and L2.
The one in the Amazon link is good from #14 to #2 AWG which includes #4. They do make smaller ones that go up to #4, I was paying around $9 each at the supply house for the #4 size but since I retired last year I don't know what they cost any more.
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Old 10-28-2021, 09:21 AM   #6
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Quote:
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Also does anyone make an insulated 4 wire connector. Not a multi tap but one for neutral, ground and L1 and L2.
Are you talking about a connector that you can unplug and will handle 50 amps? If so you can make one with twistlocks but will be pricey, you can also just make one with a 14-50R and a 14-50P. If it's a permanent one you want I am not aware of anything other than just splicing each conductor individually.
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Old 10-28-2021, 01:02 PM   #7
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Thanks again Brian and yes I'm looking for a permanent connection. I have not found a 4 wire permanent connection either on line or at a local electrical supply house.
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Old 10-28-2021, 01:19 PM   #8
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Doesn't a splice in an electrical line need to be inside a junction box?
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Old 10-28-2021, 04:48 PM   #9
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Doesn't a splice in an electrical line need to be inside a junction box?
To meet NEC code, yes.
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Old 10-28-2021, 05:55 PM   #10
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Rather than try to extend the wiring, install plug ends. Then you can run new wire with plugs to make the connection. This type of installation also allows you to unplug and bypass the EMS if it gets fried. Many people do the plug ends as a standard install when adding EMS or something like a Hughes Autoformer.
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Old 10-29-2021, 08:39 AM   #11
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I don't think your going to find those insulated.If you see the space and dividers between terminal block it pretty much would have to be there to be UL rated.
Quote:
Originally Posted by timjet View Post
Thanks Brian.
I think I need a splice connector that is suitable for #4 AWG. It's unclear to me if the one you suggested will handle that size wire.



Also does anyone make an insulated 4 wire connector. Not a multi tap but one for neutral, ground and L1 and L2.
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Old 10-29-2021, 09:05 AM   #12
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You might think about Euro style terminal blocks for the appropriate wire size and current. I would put them into a junction box.
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