lugs

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ram1234

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Hi everyone,

I wanted to know if anyone knows if you can double up lugs on one post. 110 14 a is not telling me much. any help would be great thanks
 
I agree it is the manufacturer's call.

In the past, I have requested the contractor to supply me with a letter from the manufacturer in regards to just this kind of question. The answer back from all of them so far has been a resounding...no, not permitted as per their guidelines.

BTW:
The reason for this, is the unknown quantity of heat that may be created from a field installation such as this..causing failure of the terminations.
 
I don't think the question is about putting more than one wire in a single connector. I think the question is if you can put more than one connector on a single stud? I have seen that many times, and don't think it is a real issue unless you are looking at a high amp circuit.
 
don_resqcapt19 said:
I don't think the question is about putting more than one wire in a single connector. I think the question is if you can put more than one connector on a single stud? I have seen that many times, and don't think it is a real issue unless you are looking at a high amp circuit.
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At the factory, terminations are tested as per the manufacturer's specifications. Under their conditions, they know how a particular termination will perform.

In the field, as one installs lugs on the same post, which may be different than the manner as specified from the manufacturer, I myself am not an engineer, so I simply ask for a letter from the manufacturer stating this installation would meet their approval for their equipment. As I have mentioned, I have not seen a letter come back with a stamp of approval from the manufacturer since I started asking for these letters.




I am curious as to how one would install 2 lugs to the same post and still think there is enough surface material of the two lugs touching to keep conditions of overheating from occuring?

Don
I am pretty sure you probably know more about this topic than I do, but I am curious as to what you may have to say.
 
Many times equipment, transformers specifically, will come without lugs and without instructions explaining lug installation. So how would someone know if they could use more than one lug on a bolt?
 
It depends on the construction of the terminal pad.

For example in a transformer it is not uncommon for the manufacture to provide only mounting pads absolutely no instructions or recommendations For this type of connection it is common to mount multiple lugs per bolt.

For a panelboard, the lugs are usually mounted on studs. Mounting two lugs per stud would require the use of 'spacers' which would then probably result in inadequate clearance between the top lug and the panel deadfront.
 
ram1234 said:
Hi everyone,

I wanted to know if anyone knows if you can double up lugs on one post. 110 14 a is not telling me much. any help would be great thanks
Click to expand...

Its a pretty common thing to do.

It may not technically be within code.

Its not unusual for us to get equipment in that just has a single stud, but its impractical to try and wire it up with a single conductor.

You can try and find a lug that accepts two wires.

Seems to me I have seen some lugs that show pictures of multiple lugs on a single stud. I will try to hunt them down.
 
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