OK lets say I have a subpanel and I ran out of spaces from the neutral bar can I twist 2 or 3 neutrals together and put them in one slot?

No. You may leave the bar with one wire and splice the others onto it.

ok lets say i have a subpanel and i ran out of spaces from the neutral bar can i twist 2 or 3 neutrals together and put them in one slot?
No you cannot. Nor can you pigtail one neutral to several others.

You CAN however do this with ground wires. Typically you can put two or three ground wires in the same terminal hole, but this does not apply with your sub-panel since the ground and neutral bars are separate.

tkrussell can you explain that for me splice the others onto it?so you saying is OK to splace the neutrals and use one hole if I have only one left and several neutrals?

tkrussell you saying splace the neutral and leave one just a bit loger that the others and s crew it in the only one hole left?

If the circuits originate from different breakers this is not an option. The neutral pigtail will get overloaded since it will be carrying the return current from multiple circuits.

How about a larger neutral bar, or if allowed, add a second?

Actually there should be no reason to run out of neutral space in a sub-panel. There should be plenty of space considering that you would be putting in an additional ground bar to keep the grounds and neutrals separate.

Thank you guys for you help.My brother and I own different units that we are wiring and I wasn't here when they put the panels for each unit, and each panel have 4 spaces for breakers and one little bar for neutrals and I thought that I that it will be fine to put the neutrals and grounds in the same bar since is only one bar,but now I put an other bar for the grounds. Thank you again.I have a doubt about something in my neighbor house have subpenal and have a log bar and the top part has neutrals and the bottom part has the grouds is that OK? Or needs a different bar also?

They need to be separate. The Ground Bar Bolts directly on the panel, The Neutral is separate and Isolated from Ground.
How many wires are coming into the Panel? 2 hots, a neutral and ground?

Yes is 2 hots and a neutral

Since you added the ground bar, do you have enough places for your neutrals?

Yes I have enough spaces for the neutras.

Hi stramando. Is 2 hots and a bare wire. I know that they need to be separate but, my question is why? OK this is what I have 3 phase panel and this panel is going to feed a 240 sub panel but, they only run 2 hots and a bare wire, I told them that we need another wire and they say is OK because the type of transformer they using.So and the sub panel I assuming that the bare wire is the neutral in this case can I put my neutrals and ground wires in the same bar since they din't run a ground wire? They say the neutral is grounded.

Franco,

You are not making sense at least to me anyway. Can you please take pictures of the site and attach them to this thread.

If this is a residence, then I seriously doubt that you have a 3 phase installation.

Does your main service panelboard have an orange conductor going to the "B" buss and then two more going to other power buss-es? Plus Neutral and Ground?

I suspect that you have a single phase system (2 Hots and 1 Neutral) You need Neutral so that the 120V requirements can be met.

Regardless, you must use a four wire feed to the secondary panelboard. Also, at this panelboard, Neutral and Ground must be isolated.

If you plan on using 120V, you must have a neutral bus.

Hi donf thank you for you help, I will post a picture.

Stanforty, are you saying you can't have 1 wire on a breaker and have 2 hots connected with a wirenut.

What would you do If you had a conduit below the panel for a receptacle below, and you have a conduit leaving the top of the panel feeding the rest of the room, Are you saying they have to be on 2 breakers. Just curious, you seem sharp on code as does TK, and others here.
I have seen neutral bars lacking room.

No, I was only referring to neutrals.