SDS

[pedro1200]

Is this illustration on the sds connection of a sbj correct? The illustration is found on nec 2020 hand book page 192

 

[don_resqcapt19]

Picture is poor quality, but I don't see an issue. What do you think is wrong?

 

[pedro1200]

Im not saying is wrong but mike holts illustrations show the sbj from the transformer winding to ground bar

 

[hillbilly1]

Are you talking about where the black arrow is pointing? That is the primary,

 

[pedro1200]

No sorry on the secondary the sbj

 

[infinity]

This is from the 2011 NECH but appears to be the same as the OP. Everything looks correct. The conductor between the transformer grounding terminal and the ground terminal in the other enclosure is a SSBJ.

 

[pedro1200]

This is from the 2011 NECH but appears to be the same as the OP. Everything looks correct. The conductor between the transformer grounding terminal and the ground terminal in the other enclosure is a SSBJ.

View attachment 2582559

Im talking about the sbj. Whats labeled here as a sbj imo is simply a bonding jumper . The sbj is the connection from secondary winding. Am i incorrect?

 

[infinity]

Im talking about the sbj. Whats labeled here as a sbj imo is simply a bonding jumper . The sbj is the connection from secondary winding. Am i incorrect?

That SBJ or system bonding jumper is correct in the graphic. Look at the definition in Article 100.

 

[don_resqcapt19]

ike holts illustrations show the sbj from the transformer winding to ground bar

The location of the system bonding jumper is up to the installer or designer...it can be in the transformer, or it can be in the first OCPD but not in both.

 

[infinity]

Im not saying is wrong but mike holts illustrations show the sbj from the transformer winding to ground bar

Assuming that what you're calling the winding is actually the X0 he's correct.

 

[pedro1200]

The location of the system bonding jumper is up to the installer or designer...it can be in the transformer, or it can be in the first OCPD but not in both.

Yes i understand that. I was confused on this illustration labeling of sbj not the location

 

[pedro1200]

Assuming that what you're calling the winding is actually the X0 he's correct.

Yes thats correct the xo

 

[infinity]

Yes thats correct the xo

So when you're installing the SBJ in the transformer it goes from the X0 to the terminal provided for all of the grounding and bonding connections or from the neutral to the case of the transformer as shown in the graphic. IMO the labeling of the neutral in the graphic is confusing. This is where the graphic that I posted may differ from the OP.

 

[pedro1200]

So when you're installing the SBJ in the transformer it goes from the X0 to the terminal provided for all of the grounding and bonding connections or from the neutral to the case of the transformer as shown in the graphic. IMO the labeling of the neutral in the graphic is confusing. This is where the graphic that I posted may differ from the OP.

Thank you i agree.

 

[infinity]

Thank you i agree.

I cannot tell from you photo but is the 2020 graphic different from the 2011 graphic that I posted? If I remember correctly between those two code cycles the NEC added a requirement for a factory installed terminal in the transformer for bonding and grounding purposes.

 

[pedro1200]

I cannot tell from you photo but is the 2020 graphic different from the 2011 graphic that I posted? If I remember correctly between those two code cycles the NEC added a requirement for a factory installed terminal in the transformer for bonding and grounding purposes.

They seem to be the same