Sub panel bonding question

[Mac25]

I ran power from my 200 amp service panel in my house to a 100 amp panel in pole barn. The neutral and ground in the house have continuity. From what I have read, the panel in the barn needs to be unbonded, which I did, but the neutral and ground still have continuity due to the fact that they are bonded at the house panel. Is this correct and should I install some ground rods for added security?

 

[buickanddeere]

We have no idea what you ran between the two panels for electrical conductors.

 

[Mac25]

Two hots, neutral and a ground

 

[hosspuller]

My subpanel has the neutral isolated from ground. Additional grounding can't hurt. It's only used in a fault condition, so you want a sure ground.

 

[CobyRupert]

Yes,unbounded gnd. @ neut at sub panel is correct. Code says ground rod at sub panel if more than 1 breaker at panel, not required if only one. So what's the difference? Essentially the code says "eh, sometimes.", but they drew a line somewhere at 1 ckt.
Realistically, ground rods will help drain static charges and maybe disperse lightning better, but from a human safety perspective, your ground wire is what will carry ground fault current back to the transformer neutral in quantities big enough for the breaker to pop.

 

[tnjind]

Do not tie the neutral and ground together in a subpanel, Do not use an additional ground rod if it is close to the original ground rod.
There is a valid reason but for the life of me I can not remember it.

 

[Mac25]

Do not tie the neutral and ground together in a subpanel, Do not use an additional ground rod if it is close to the original ground rod. There is a valid reason but for the life of me I can not remember it.

I did not use te bonding screw in the sub panel, but the neutral and ground still have continuity due to the fact that they are bonded in the main panel. Is this correct?

Sent from my iPhone using TractorByNet

 

[aczlan]

I did not use te bonding screw in the sub panel, but the neutral and ground still have continuity due to the fact that they are bonded in the main panel. Is this correct?

Yes, that is correct.

Aaron Z

 

[ENC]

What do you do if the ground and neutral bars are joined in the panel? Just break a piece of the connecting bar out?

 

[BobRip]

Yes,unbounded gnd. @ neut at sub panel is correct. Code says ground rod at sub panel if more than 1 breaker at panel, not required if only one. So what's the difference? Essentially the code says "eh, sometimes.) but they drew a line somewhere at 1 ckt.
Realistically, ground rods will help drain static charges and maybe disperse lightning better, but from a human safety perspective, your ground wire is what will carry ground fault current back to the transformer neutral in quantities big enough for the breaker to pop.

+1 Well stated.