rsday, October 22, 2015 6:27 PM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Current limiting fuse at battery bank
On battery based systems I always install a Class T fuse as close to the
battery bank as possible. 690.71(C) is a little vague in requiring a
current limiting fuse only
Dan,
That's right about the unprotected DC + main. Trace used the
inverter GJ, so turning off DC loads required turning off the DC to
the inverter - which meant reprogramming it afterward. And it used a
#10 tap pigtail. Stoopid.
If I have several DC loads I have
Thanks, everyone. I see I'm not the only one juggling competing concerns
on the battery fuse issue. For the service call that motivated my query
I think we'll leave it as is - the installation has short battery cables
in conduit into an Outback system, and no easy way to mount a fuse
external t
HI Dan,
All the big three have the same wiring diagrams with a positive buss and then
breakers going out from there.
And yes there is no main disco for the DC branches.
But if your point was that the fuse could/will blow and then you have the
PV/wind connected to the inverter and could ove
Esteemed Wrenches;
This creeps me out too and sometimes causes lack of sleep.
The Midnite Solar power panel install manual shows no OCPD on in DC + main
from battery bank to power panel. Easy to wire the main DC breaker to
control those conductors, but then you have a "self destruct" switch if
syst
It's ALWAYS good practice to install a current limiting fuse at the battery
bank, if fact it's very poor practice not to. We're working with a lot of
larger lithium ion phosphate manganese systems and I would not install them
without it. As far as working on someone else's install, make your co
At an absolute minimum a current limiting the fuse at the battery bank is
required if not by the law by common sense
In banks with multiple strings in the past I have fused each string
I have seen banks in the past where a single battery failed and for lack of a
better description the others gan
I agree, fuse it
Jerry
On Oct 22, 2015 3:26 PM, "Tom Ruscitti" wrote:
> On battery based systems I always install a Class T fuse as close to the
> battery bank as possible. 690.71(C) is a little vague in requiring a
> current limiting fuse only where the available short-circuit current from
> th
Tom,
Agree with Ray here. But more than that, if you consider a class T fuse good
practice, include it. But do no more than offer it when you work on others'
systems. The homeowner usually won't see the value in the same way that you do,
it won't affect the system 's performance unless there's a
I agree installing a fuse at the battery bank is a good idea. However
actually doing it right is tough. Putting the class T fuse and holder
in a battery enclosure with flooded cells is going to cause more trouble
than it solves. I've seen class T fuses oozing green goo out the ends,
and the
On battery based systems I always install a Class T fuse as close to the
battery bank as possible. 690.71(C) is a little vague in requiring a
current limiting fuse only where the available short-circuit current
from the battery bank exceeds the interrupting ratings of the inverter
breaker. Inve
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