690-13 PV equipment shall be capable of disconnect from all sources of power, therefore need AC and DC disconnect
690.14.c.5 Disconnects shall be grouped, In Minnesota most inspectors read this as within 6 feet of the inverter. So if yo are next to the service panel you can use the breaker in the service panel to disconnect, if further than 6 feet you must provide a AC disconnect. --- On Thu, 2/25/10, [email protected] <[email protected]> wrote: > From: [email protected] <[email protected]> > Subject: Re: [RE-wrenches] DC & AC Disconnects near inverter > To: [email protected] > Date: Thursday, February 25, 2010, 12:59 PM > Wrenches, > > My memory is telling me that grid connected inverters > should have both the > DC disconnect and AC disconnects close (within site). This > may be from a > "best practice" standpoint and not a code issue. The case > in point now is > an older Fronius IG (not IG plus). It has DC and AC > breakers in the > inverter but I don't believe that they meet the need for a > maintenance > disconnect for servicing, or removing, the inverter. > > Article 690 Part III Disconnecting Means > 690.14 Additional Provisions. (D)Utility-Interactive > Inverters located in > Not-Readily-Accessible Locations. 690.14(D)(1)&(2) > States the > disconnecting means should be located within site of the > inverter. > Does this just pertain to Not-Readily-Accessible invertes? > > My question is. Is there any other code provision that > mandates > disconnects within sight of the inveter? I'm thinking back > to an > installation we did a few years ago, before SMA had the DC > disconnect > switch in the detachable enclosure for their Sunny Boys. I > had a roof > mounted PV array on the garage roof with a 600VDC > disconnect in the garage > and then another 40 feet of conduit (metal lined flex) > traveling into the > homes basement where the SB3800 inverter lived. I installed > another 600VDC > disconnect next to the inverter. Is this second DC > disconnect mandated by > code? Or is it just a good practice? > > David Palumbo _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
