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Low-Power Solar? - Page 6

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Posted by j on February 14, 2012, 7:11 pm
On 2/14/2012 11:42 AM, Vaughn wrote:

I've used UF but have no experience in ground so I defer to your
expertise. Conduit is certainly cheap. But I wonder, how does buried UF
get damaged that wouldn't damage plastic conduit? I suppose two or even
three conduits would give you room to expand or replace.

   For most labor intensive projects these days I rely on little Spanish
speaking guys!


Posted by Vaughn on February 14, 2012, 8:09 pm
On 2/14/2012 2:11 PM, j wrote:

PVC, especially Schedule 40 PVC, will stop a shovel. That same shovel
can easily damage UF cable.

The worst situation is when UF just gets nicked. Months or years later,
when you have forgotten all about where you dug up that bush, the cable
will finally succumb to the wound.  It will either short to ground, or
burn open.  Now you can't pinpoint the fault, so the only way to fix it
is to dig a new ditch.

On the other hand, When you damage conduit, you simply dig a pothole,
fix the conduit, then pull new conductors.  No new ditch!

Yes, and the "expansion" might not even be electrical. I have water and
air lines going out to my shed.

Don't remind me!  We just a bunch of those busy little guys swarming the
roof of our house.  Brand new concrete tile roof.  The roofing they tore
off was over 50 years old.  That roof cost more than double what I paid
for my first house!

Just think of it as economic stimulus.  :-)

(Getting back to solar) Not wanting to penetrate that expensive roof is
one big reason why I'm unlikely to ever have a big solar system.


Posted by j on February 14, 2012, 9:17 pm
 On 2/14/2012 3:09 PM, Vaughn wrote:


   Not bad lifespan! Must have been a hell of a dumpster load.

  That roof cost more than double what I paid

Yes, they spend their money very fast! I've seen Amish with smaller and
less needy families.

I had thought of roof mounting too before I put on my new roof!

I may put in solar hot water out at the property perimeter where I get
some sun. The idea would be to store it there and run insulated lines to
the house. The pumping loss is not much, but the thermal loss may be. I
suppose you are talking PV though, which I can't justify the cost yet.


Posted by (PeteCresswell) on February 14, 2012, 9:33 pm
 Per Vaughn:

I think of it more as roofers out of work.

Our new roof was put on by the same outfit that put the previous
one on.   Only this time, nobody on the crew spoke English except
for one guy who was the spokesman - who had a few words.

8-10 people worked on that job.   All I could think of was that
the 8-10 local guys that put on the previous roof are now out of
work and the 8-10 guys that did the latest one are going back to
Mexico after their work visas expire.

Pete Cresswell

Posted by clare on February 15, 2012, 1:27 am

 For the low voltage wire a cheap garden hose works to allow relativly
simple cable replacement - just make sure to pack around it with sand,
not gravel.

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