I would suggest the best gear for the situation and just refuse to use the substandard stuff, if you can. It’s not worth a fire or worse.
I have lost jobs for not letting the customer spec gear for me, I get over it. I either do it right or not at all. Later, Bob Ellison From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of JRQ Sent: Saturday, December 31, 2011 1:47 PM To: RE-wrenches Subject: [RE-wrenches] battery venting I am doing this project in India. The cost structures here are a great deal more constrained that what we're used to. Using AGM batteries is going to be a deal-breaker with the client as far as cost. I also don't know if I can persuade the client to ship anything additional from the US. We pay more for electrical stuff, and then shipping adds quite a bit more on top. I've sold them on the idea of an Outback GTFX inverter on the basis of its functionality in a backup setup, but, for instance, I'm having a hard time convincing them that an E-Panel and a listed combiner box are a good idea, rather than just cobbling the BOS enclosures together from locally available breakers and PVC j-boxes. I also may end going with a indian-made PWM CC rather than a FM60. The quality of electrical work here is abysmal. I'm not sure if I can successfully make an argument on the grounds of somewhat contingent safety concerns, or even less on engineering standards. So I'm wondering: are there parameters that constrain the bending of a venting pipe and the maximum angle from plumb that the pipe should take? And does the pipe diameter play a role in those parameters? Jeffrey Quackenbush NABCEP Certified PV Installer Peripatetic Solar Technician _____ From: Allan Sindelar <al...@positiveenergysolar.com> To: re-wrenches@lists.re-wrenches.org Sent: Saturday, December 31, 2011 8:42 PM Subject: Re: [RE-wrenches] battery venting Jeff, I would use a Power Vent by Zephyr Industries. In addition to a 12V or 48V fan, his units have a built-in backdraft damper. Negative building pressure under certain conditions would be a concern of mine, so I wouldn't rely on angle to ensure exhaust always travels up and out. Allan Allan Sindelar <mailto:al...@positiveenergysolar.com> al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com <http://www.positiveenergysolar.com/> On 12/31/2011 7:59 AM, JRQ wrote: Wrenches, I'm looking at a potential battery backup system wtih a 200 AH @48V flooded battery bank in the basement electrical room of a 3 story building. There is a window in the electrical room. The batteries will be located about 10' from an outdoor wall. The building is all reinforced concrete, so I can not run a vent pipe vertically from the batteries. Does anyone have a rule of thumb for how much the vent pipes can be angled from the batteries? Would it be more lenient for short sections of pipe (say <2') versus one long angled piece from the batteries? My instinct would be to keep the pipe no more than 45˚ from plumb. Or with bending the vent pipe: does anyone have a best-practice rule for the sum of the angles of bends? Thanks, Jeffrey Quackenbush NABCEP Certified PV Installer Peripatetic Solar Technician _____ From: Drake <mailto:drake.chamber...@redwoodalliance.org> <drake.chamber...@redwoodalliance.org> To: re-wrenches@lists.re-wrenches.org Sent: Saturday, December 31, 2011 8:08 PM Subject: [RE-wrenches] Pole Mount PVC Hello Wrenches, With pole mount systems, It looks cleaner and is safer to run the PVC conduit down the pole into the concrete, and use a 90 degree elbow to come out through the side of the anchor underground. This way, the pipe is protected from mechanical damage, and there is nothing to trip over when adjusting the array for seasonal tilt. I was told that some building departments will not allow this. Has anyone had a problem with using this method, either technical or legal? How do you like to route your conduits? Thank you, Drake Drake Chamberlin ATHENS ELECTRIC LLC OH License 44810 CO license 3773 NABCEP Certified PV _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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
_______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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
