T&T: Cummins 5.9 High Output Alternator Large frame & belt routing
2elnav at netbistro.com
2elnav at netbistro.com
Tue Dec 2 15:02:56 EST 2008
Mike wrote:
> The 12 volt DC panel is an AC type panel, but there is no indication
> that the breakers are rated for DC. As I recall DC ratings are not the
> same as AC ratings, Arild would know about this.
> Capt. Mike Maurice
REPLY
ABYC standard clearly stat that all panels must be labelled with the
workign voltage. Panel should have ben labelled as being 12V DC or 24V DC
as applicable.
Mike is correct when it comes to pure thermal breakers such as you have in
houses ashore. These rely on wattage to heat up the thermal strip and
trip.
The magneto-hydraulic designs by Carlingswitch, Airpax, and Heinemann (sp)
to name three brands often found in marine panels are dual rated. A label
on the side of the breaker does clearly state when it is dual rated for
both AC and DC.
Arild
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