230.85 Questions.....I'm confused..

[don_resqcapt19]

I don't get why one would do this. If you use a main breaker panel that is suitable for service equipment then you have met the requirement. Why add another disconnect or are you saying a MB panel will not suffice?

The code permits this so you do not have to redo the grounding and bonding when replacing existing interior service equipment. You can add the exterior emergency disconnect, and simple replace the interior service equipment leaving the GEC and MBJ at the interior service equipment.

 

[RiverCityElectric]

The code permits this so you do not have to redo the grounding and bonding when replacing existing interior service equipment. You can add the exterior emergency disconnect, and simple replace the interior service equipment leaving the GEC and MBJ at the interior service equipment.

This is how I understand it as well. Then you will not have to rewire those existing 3 wire branch circuits to the range and/or dryer.

So is it safe to say you and I are in consensus donresqcapt? We see it the same way?

 

[Dennis Alwon]

The code permits this so you do not have to redo the grounding and bonding when replacing existing interior service equipment. You can add the exterior emergency disconnect, and simple replace the interior service equipment leaving the GEC and MBJ at the interior service equipment.

Was not thinking service change. Thank you

 

[romex jockey]

This topic has been very confusing to the industry, and has created many questions on the forum

yes it is Tom

much of it is really based in 'lectrical theory

~RJ~

 

[Tulsa Electrician]

Why not treat it like a meter on a feeder for a building. Let the grounded conductor serve as the grounding / bonding of the enclosure.
Use PVC from the meter in this case to the em disc. Then PVC to entrance of building, the em disc can not be mounted to a metallic part of the construction.
Keep in mind if em disc watch you distance entering the building or it will change the classification of the em disc to service equipment.
Me myself for now I will set outside and all GEC to there with MBJ and four wire in and separate.
I would only consider the other option for a service Change on an upgrade requiring a em disc. As long as the service panel was not replaced.

 

[Dennis Alwon]

So this only comes into play if the existing panel is still the service panel. How often would that likely happen?

 

[don_resqcapt19]

So this only comes into play if the existing panel is still the service panel. How often would that likely happen?

Probably when a storm tears the the riser and meter off the outside of the building.

 

[Dennis Alwon]

Probably when a storm tears the the riser and meter off the outside of the building.

Makes sense. Around here they used to just let us put it back - like for like... without having to upgrade when there is a storm involved. Not sure what they will do now.