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Old 04-04-2010, 06:19 PM   #16
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adding the neutral from Main to subpanel


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Originally Posted by H2O Engr View Post
^^ secutanudu - if adding a UL-listed neutral lug like the one pictured above, would it have to be listed by the manufacturer for use with that specific electrical panel or could it be used in any panel assuming it's installed properly (solidly mounted, securely fastened, adequate contact surface, etc.)?
Not sure...I'll let an expert chime in.

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Old 04-04-2010, 07:44 PM   #17
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adding the neutral from Main to subpanel


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Originally Posted by secutanudu View Post
Not sure...I'll let an expert chime in.
Unforetally with the OP's panel that have HOM series it will have to use the proper UL-listed netural connecter like that to spefic brand due each manufacter have diffrent netural bussbar set up so they are not really interchangeable at all.

Merci,Marc
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Old 04-04-2010, 08:37 PM   #18
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adding the neutral from Main to subpanel


What is the logic for prohibiting multiple conductors in a terminal? Safety? Do two or more conductors prevent proper tightening? Or, what makes a terminal which is listed for multiple conductors different from one that is not?
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Old 04-05-2010, 01:49 AM   #19
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adding the neutral from Main to subpanel


One neutral per hole is what is allowed by the NEC and also by the manufacturers instructions.

Whether multiple grounding conductors can be used is determined if the panel was listed that way by UL or another testing agency.
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Old 04-05-2010, 08:04 AM   #20
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adding the neutral from Main to subpanel


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What is the logic for prohibiting multiple conductors in a terminal? Safety? Do two or more conductors prevent proper tightening? Or, what makes a terminal which is listed for multiple conductors different from one that is not?
Keep in mind a neutral is considered a load carrying conductor
So you would need to shut off both breakers for the neutrals
Every neutral would need to be marked in order to loosen a screw with (2) neutrals under it
Now add in a MWBC that might be one of these neutrals
Loosen that neutral & you have a 240v circuit
Might be other reasons but thats what comes to mind
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Old 04-05-2010, 08:12 AM   #21
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adding the neutral from Main to subpanel


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What is the logic for prohibiting multiple conductors in a terminal? Safety? Do two or more conductors prevent proper tightening? Or, what makes a terminal which is listed for multiple conductors different from one that is not?
The main reason is the heat produced by the current.
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Old 04-05-2010, 11:33 AM   #22
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adding the neutral from Main to subpanel


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The main reason is the heat produced by the current.
exactly...heat is the main concern.
I'd like to add to that, that over time the wires will loosen from expanding and contracting with the heat as well. The connection will loosen much faster with two wires under the lug than with one.

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