Sunday, February 24, 2013


Once I gave up on using the obsolete Kings Loran case new possibilities opened up. I could use a bigger enclosure that would hold more meters and therefore have more information on the battery bank. I planned to mount the enclosure at the helm so I would not have to move to see it.  I would need to make sure that the enclosure would be able to endure the weather conditions at that location. Looking at my choices I choose a
 BUD Industries PN-1325-CMB Polycarbonate NEMA 4X Box with Mounting Bracket and Clear Cover.
It had dimensions of 8.74 x 5.75 x 2.17 in.  Big enough to easy house the four battery meters I planned to install originally. Now I could also add a total battery pack voltage meter and also an amp meter too. Plus I'd still have space for other instrumentation meters I may plan in the future.
It also has flanges so I could mount it easily without drilling holes in the back of the enclosure. Since the box may be exposed to the elements keeping the amount of holes drilled into it is a good idea. The box it's self is designed to IP65 of IEC 529 and NEMA 1, 2, 4, 4x, 12, and 13 specifications and is UL Listed. The NEMA 4X spec is especially relevant in my application on board BIANKA:

"Type 4X  Enclosures constructed for either indoor or outdoor use to provide a degree 
of protection to personnel against access to hazardous parts; to provide a degree of 
protection of the equipment inside the enclosure against ingress of solid foreign objects 
(windblown dust); to provide a degree of protection with respect to harmful effects on 
the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose 
directed water); that provides an additional level of protection against corrosion; and 
that will be undamaged by the external formation of ice on the enclosure."  

Sounds like it should be able to hold up for most of the conditions experienced at the helm position. It also comes with Threaded brass inserts and cover screws are M-4 stainless steel, non-magnetic and fasten into threaded brass inserts. The cover has a gasket material of Silicon Sponge. The body and cover are also UV stabilized.
I also bought the BUD Industries PNX-91425 Aluminum Internal Panel which fits inside the PN-1235 box and mounts to the brass inserts molded into the bottom. This panel will be used to mount the meters inside the box.
With the enclosure now in hand it's time to start wiring things up.


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