Re: [RE-wrenches] AC coupled relay

Hi Drake, I'm sending you some attachments off list as well. They are Sunny Boy Specs from the SMA Installation Manuals, which are more complete than those on the SMA data sheets. Note, the Maximum Output Fault Current for the 3000 & 4000 is 30 amps, while Maximum Overcurrent Protection is 30 A

Re: [RE-wrenches] AC coupled relay

Hi Dick, There are three inverters, all Sunny Boys, a 3000, 4000 and a 7000. The breakers are QO. The AC conductor sizes are #8 for the 7000, #10 for the 4000 and #12 for the 3000. The breakers are set for the NEC ratings of the wire (40 A, 30 A and 20 A.). I sent some information to you

Re: [RE-wrenches] FW: 690.47D (revisited)

Kelly, If I understand your situation, the AHJ is allowing you to use the existing grounding electrode/s as the (new for 2008) required array electrode, rather than adding an additional electrode closer to the array. He does want an additional GROUNDING ELECTRODE CONDUCTOR, sized appropriatel

Re: [RE-wrenches] AC coupled relay

Hi Drake, Could you please provide more information, array size, inverter make / model, conductor size, breaker rating, breaker brand? Dick Solarwind Electric Bradford, VT --- You wrote: If I'm following this thread correctly, the relay is to break the flow of AC current to the battery ba

[RE-wrenches] FW: 690.47D (revisited)

All, This issue was discussed here about a year ago, before most jurisdictions had adopted the 2008 Code and AHJ's started interpreting it. Our current situation is a residential, roof-mounted PV array, with not an extraordinary distance to the existing AC GEC. The AHJ has NOT required the "addit