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I guess I will go with the 250 V glass fuses. For 24 V systems, DC fuses
are readily available at auto parts stores. It seems wonkey to use fuses
not rated for DC applications, but if they hold at 144 VDC, I'm sold.
<br><br>
There is no code issue at present. Has anyone had problems with
inspectors using these. <br><br>
Thanks to all who shared their knowledge, on and off the list.<br><br>
Drake <br><br>
<br>
At 02:51 PM 5/24/2017, you wrote:<br>
<blockquote type=cite class=cite cite="">Content-Type:
multipart/alternative;<br>
boundary="------------8DE54A1A6E5488D0D6697B6F"<br>
Content-Language: en-US<br><br>
We've used the inline glass fuses for metering and battery fan
applications for 20 years without trouble. I certainly wouldn't
use them over 5 amps though. I actually tested these inline fuses
on a 144 vdc vehicle battery bank once, and they blew without arcing or
burning. Of Course my name is not UL. However, this is also
the fuse that comes with Trimetric, Victron E-meters, and the Zephyr
power vents, currently. Also, glass fuses were used in many DC power
centers back in the day, so they have a long and proven track record in
the 48 v dc solar industry for low amp applications.<br><br>
I found a standard fuse holder from Grainger that is rated for 300
Vdc. The regular AGC fuse does not list a DC rating, which is odd,
since it is used for DC all the time. The ABC fuses are listed to
125 vdc and are fast acting. <br>
<br>
<a href="http://www.cooperindustries.com/content/public/en/bussmann/electrical/products/electronic_smalldimension/elx_1_4_x_1-1_4_/abc.brands.cooper_bussmann.html">
http://www.cooperindustries.com/content/public/en/bussmann/electrical/products/electronic_smalldimension/elx_1_4_x_1-1_4_/abc.brands.cooper_bussmann.html</a>
<br><br>
<pre>R. Ray Walters
Chief Technical Officer, RemoteSolar.com
BS Mech Engineering, 1988
Former NABCEP Certified, 2004-2016
Licensed Master ELectrician, Colorado
303 505-8760</pre><font face="Courier New, Courier"></font>On 5/24/17
12:18 PM, Jeremy Rodriguez wrote:<br>
<blockquote type=cite class=cite cite="">How about Midnite din mount
150vdc breakers. 1-63 amp range. <br><br>
Jeremy Rodriguez <br>
Solar Installation And Design Expert <br>
All Solar, Inc. <br>
1463 M St<br>
Penrose Colorado 81240<br><br>
Sent by Jeremy's iPhone. Sorry for typos and shorthand!<br><br>
On May 24, 2017, at 11:59 AM, Drake
<<a href="mailto:drake.chamberlin@redwoodalliance.org">
drake.chamberlin@redwoodalliance.org</a>> wrote:<br><br>
<blockquote type=cite class=cite cite="">Hello Wrenches,<br><br>
I'm looking for in line fuse and fuse holders for a 48 VDC systems in the
1 - 4 Amp rating. The systems can go 67 VDC. FRN-R fuses have this
rating but are slow blow, 8 seconds at 500% current rating. <br><br>
Is a glass fuse and in line fuse holder, listed for this voltage and
amperage, available anywhere? It seem that the default is to use 250 VAC
glass fuses and holders, which seems like a questionable practice to
me.<br><br>
Drake<br><br>
Drake Chamberlin<br>
<i>Athens Electric LLC<br>
OH License 44810<br>
CO License 3773<br>
NABCEP Certified Solar PV <br>
740-448-7328<br>
</i><a href="http://athens-electric.com/">http://athens-electric.com/</a>
<br><br>
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