Murray panels question

[dwellselectric]

So im not used to using this brand of panel. I like QO. But this was less expensive. So when I removed the cover I noticed there was a neutral bar on both sides and an insulated bar connecting them. And under the neutral there was a ground bar. So the neutral bar had a jumper to bond the panel. Question is if I has to use that ground bar for neutrals as well would I be required to install a jumper between the ground and neutral bar or does that factory jumper take care of thatt? Im going to install a jumper anyways I was just curious. Thanks for the input ahead of time

 

[John120/240]

There should be a green screw attaching the bond strap to the panel . Just like in a SQ D

QO or HO panel.

 

[kwired]

Question is the bar in question part of the neutral assembly or is it strictly an equipment ground bar.

The label on the panel should tell you. My guess is it is part of the neutral assembly, but I may not understand exactly what you are describing.

 

[dwellselectric]

Sorry to be so confusing. The bar im referring to is below the neutral bar. The oonly way it would be connected to the neutral bar would be that bonding jumper that you attach from the neutral bar to the housing. So what im trying to say is that say you attach the jumper from the neutral bar to the panel itself and that other bar now becomes a grounding/neutral bar? And if so and you attach your neutrals to that bar also you are counting on the panel to carry the neutral load through that jumper? You don't need to install another jumper from the neutral bar directly to the other bar?

 

[kbsparky]

How about a picture? Worth 1000 words ...

 

[dhalleron]

Not sure how to attach pictures. See if this works.

I think this picture is what the OP is talking about and I think bar #3 in this picture cannot be used as a neutral bar because neutral current will flow through the can.

This picture might not have the screw bonding the neutral to the can, but it should be similar to what the OP is talkng about.

 

[maghazadeh]

dSilanskas
Sorry to be so confusing. The bar im referring to is below the neutral bar. The oonly way it would be connected to the neutral bar would be that bonding jumper that you attach from the neutral bar to the housing. So what im trying to say is that say you attach the jumper from the neutral bar to the panel itself and that other bar now becomes a grounding/neutral bar? And if so and you attach your neutrals to that bar also you are counting on the panel to carry the neutral load through that jumper? You don't need to install another jumper from the neutral bar directly to the other bar?

THe panel in the picture of reply #6 is a double purpose panel, either used as service pnl (if you leave the bonding jumper strap on, then bar # 3 shall be used as grounding bar only, and bar #2 shall be used as grounded/grounding bar.) Or used as sub panel, then don't use the bonding jumper at all (keep bar # 2 insulated and land neutral wires to it only, and bar # 3 for EGC.)
NOTE: Bar # 2 is similar to the bar on the left side of picture and see both as one bar.
Both jumpers the one attaching 2 neutrual bar #2 and bonding jumper strap attaching neutral bar to the enclosure are sized by mfg. to comply with applicable NEC code.

 

[al hildenbrand]

So what im trying to say is that say you attach the jumper from the neutral bar to the panel itself and that other bar now becomes a grounding/neutral bar?

Any neutral current to the "other bar" must travel through the steel of the enclosure before arriving at the Main Bonding Jumper. The steel is not an allowed conductor for a neutral on the load side of the MBJ.

The "other bar", installed to the steel enclosure is only an equipment grounding conductor bar.

 

[dwellselectric]

Thank you everyone for your responses. You have answered my question

 

[stew]

Looks like a multiuse panel to me. If the neutral is bonded to the can for use as a service panel then the ground bar is at the same potential as the neutral bar. They are connected together thru the can and no jumper is required. The ground bar(#3) could be used for either grounds or neutrals in this configuration however I believe murry intends for the neutral to be landed on the neutral bar and the grounds on the ground bar. The only reason for the separate ground bar is for when the panels is used as a subpanel in which case the nuetral is NOT bonded to the panel. Then of course the neutral is isolated from the can.