[RE-wrenches] 200 Amp Main Equip for 60A Solar

Thu Jun 13 13:52:46 PDT 2013

Jeff C.

The labels on the device itself specify 270 amps max which must refer to the meter socket and wiring to the main 200 amp breaker.  The bus bars are listed on the device labels at 225 amps.  I have only seen these numbers on the device itself.

The pass through lugs are on the load side of the 200 amp main.  The 70 amp secondary main breaker is on the meter side of the 200 amp main.

Any of the 8 breaker spaces may carry 70 amps of PV.  (225 x 1.2)-200=70.  

The question that I have is, does code allow one of the 8 breaker spaces to carry 70 amps of PV AND the secondary main breaker to carry another 70 amps of PV?

Jeff W.

On Jun 13, 2013, at 12:30 PM, Jeff Clearwater wrote:

> Hi Jeff W.
> 
> Great!  Thanks - just what the doctor ordered.
> 
> Question though - do the pass thru lugs allow then even more than 70 Amps backfeed?  In essence like a supply tap?  
> 
> In the Eaton catalogs it still shows "200 Amp rated" on that unit.  I haven't been able to find a schematic that shows the 270 Amp rating applied to exactly which bus bars or conductors.
> 
> But I take your word for it!  Though the Service Entrance electrician would love to see specs or drawings confirming that.
> 
> I'm glad to further look for docs but thought you might have already nabbed them?
> 
> Thanks again Jeff!
> 
> Jeff C.
> 
> 
> 
> Jeff Wongstrom wrote:
>> 
>> Jeff.
>> 
>> Although not marketed for PV, the Eaton Cutler Hammer Ranch Panel CMBER88B200BTS has a 270 amp rating and comes with a 200 amp main breaker with space for a 70 amp secondary main breaker space(a tap between the meter and the main breaker) as well as pass through lugs and 8 more breaker spaces.  The local Platt stocks them at less than $300.  We have used them for several service upgrades and love them.
>> 
>> Jeff
>> 
>> <image.jpg>
>> Jeff Wongstrom
>> NABCEP Certified PV Installer
>> Licensed MT Residential Electrician
>> 406.291.3416
>> thirstylakesolar.com
>> 
>> On Jun 13, 2013, at 6:32 AM, Dave Click wrote:
>> 
>>> Jeff,
>>> 
>>> This has been sent out on the list a few times but I don't remember anyone sharing their personal experiences with it:
>>> 
>>> http://solarprofessional.com/articles/products-equipment/product-launches/milbank-offers-load-tap-connector
>>> 
>>> 200+ 60 for a meter main is trickier. The $1100 (list) Schneider RC2M200S lets you do a 200A main and a 50A PV breaker (interconnecting on line side of the 200A), which may be close enough for you depending on your system details (10kWac @ 240V -> >52.1A breaker).
>>> 
>>> DKC
>>> 
>>> On 2013/6/12 21:09, Jeff Clearwater wrote:
>>>> Hey Wrenchies,
>>>> 
>>>> Anybody know of a 200 Meter base with lugs rated for dual wire so we can
>>>> do a 60 Amp Supply side solar feed on a 200 Amp service?
>>>> 
>>>> Or does anyone know the right equip to get to ensure we can install 2
>>>> dual lug taps on both single lugs? (a meter base with enough room for
>>>> the T lugs?)
>>>> 
>>>> Or better yet any integrated 200 Amp Service / Meter equipment that has
>>>> an accessible spot to tap 60 Amps for a Disconnect on the meter side of
>>>> the Main?
>>>> 
>>>> I have 2 SB 2500Us existing and want to add a single SB 5000TLUS - I
>>>> show rated output to be 46 Amps total and hence a 60 Amp needed.
>>>> 
>>>> Advice my esteemed colleagues?
>>>> 
>>>> Thanks,
>>>> 
>>>> Jeff
>>>> 
>>>> --
>>>> Jeff Clearwater
>>>> Village Power Design
>>>> Renewable Energy Design & Installation
>>>> Ecovillage Design Consultant
>>>> www.villagepower.com
>>>> 413-559-9763
>>>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>> 
>>>> 
>>>> 
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