electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
Are your SURE, there is a SOUSE label on it? Are you sure you dont want to go look again wink wink.......
Typically combination style devices, like meter mains, that get theses labels.It also seems strange that a manufacturer would limit the use of their equipment by seeking or building it such that it gets a SUOSE label.
Typically combination style devices, like meter mains, that get theses labels.
Well not exactly. Granted it's not super common, but What about refeeding a existing structure that has a meter main from another location? We had to do this for a PV system last Summer. Existing meter man on the house, we installed a pedestal for a new meter between the house and the ground Mount array. Fortunately we were able to use 230.40 exception number three and just put a bypass plate on the meter socket at the house, but there are other situations where it would have needed to be changed to a feeder.
Since it is almost impossible to have a meter main not be service equipment, the SOUSE designation does not limit their use
This happens and it's not the first time it has happened to us.Ok, so even if you dont touch the MDP, they are requiring it brought up to code. Thats lame.
I wish this were a residential system; if it were we could solve it pretty easily/cheaply. This is a 700kW PV system for a 2000A service.Well not exactly. Granted it's not super common, but What about refeeding a existing structure that has a meter main from another location? We had to do this for a PV system last Summer. Existing meter man on the house, we installed a pedestal for a new meter between the house and the ground Mount array. Fortunately we were able to use 230.40 exception number three and just put a bypass plate on the meter socket at the house, but there are other situations where it would have needed to be changed to a feeder.
If the MDP is after the service disconnect you must have separate grounded and equipment grounding conductors there.That wasn't my question. Do we not have the option of bonding N to the enclosure in the service disconnect and leaving N bonded to G in the MDP?
(posted before seeing Wayne's reply; looking at the 2020 NEC)
Any chance the POCO will give you a separate service drop and meter for the PV (with virtual net metering or whatever is applicable depending on the tariffs), allowing you to not touch the customer-owned equipment on the existing service at all?This happens and it's not the first time it has happened to us.
This happens and it's not the first time it has happened to us.
I wish this were a residential system; if it were we could solve it pretty easily/cheaply. This is a 700kW PV system for a 2000A service.
As far as I know, the service disconnect is ocpd. A switch before the ocpd isn’t the service disconnect and the neutral ground bond is still in the panel.250.142(B) has a few exceptions, one is for "meter enclosures" but unfortunately that is as close as you will get .
I thought I had a loophole: installing a service disconnect only (NF safety switch, no overcurrent protection), so your MDP would still be service equipment as it is your overcurrent protection, but unfortunately the wording is such that the N- G must be separated after the "service disconnect", not "service equipment"
There is nothing prohibiting a service disconnect without ocpd and having your 239.90 over current protection in a separate enclosure. See 230.94.As far as I know, the service disconnect is ocpd. A switch before the ocpd isn’t the service disconnect and the neutral ground bond is still in the panel.
Granted with a NF disconnect you are stuck with a 10K SCCR....... I imagine you can get a bolted pressure switch non-fused?There is nothing prohibiting a service disconnect without ocpd and having your 239.90 over current protection in a separate enclosure. See 230.94.
Unfortunately, I do not believe that the MLO panel has a provision to install a main breaker. It's worth checking out, though.There is nothing prohibiting a service disconnect without ocpd and having your 239.90 over current protection in a separate enclosure. See 230.94.
230.79 indicates that the service disconnecting means has an overcurrent rating. 230.91 indicates thatThere is nothing prohibiting a service disconnect without ocpd and having your 239.90 over current protection in a separate enclosure. See 230.94.
I appreciate your contribution to the thread, but the ultimate arbiter in the situation will be the AHJ. I will ask questions of what the AHJ will allow and what the manufacturer of the panel will permit, and I will submit a design which is acceptable to them and as painless as possible for ourselves and the customer. My question was answered in post #2.230.79 indicates that the service disconnecting means has an overcurrent rating. 230.91 indicates that
“The service overcurrent device shall be an integral part of the service disconnecting means or shall be located immediately adjacent thereto” as in fuses.
Once again a person here is splitting hairs and your hair splitting isn’t applicable to or contributing to the subject from the OP. Nor is it applicable to the post I commented on. A switch in front of a circuit breaker or a fused disconnect IS NOT a service disconnect and it doesn’t negate the requirement to bond the neutral and ground in the actual service disconnect. That is the meat of this thread.