Hi Tom,
ABYC's TE-30 is pretty clear about what is high voltage, as you can see HV AC systems are 300VAC+ and HV DC systems are 50VDC+. Every interpretation that I have heard focuses on nominal voltages so our typical 48V systems are covered under ABYC E11. Even without considering charging voltages, a fully charged 48V lead acid battery pack sits at 51.2V, although the voltage will drop below 50V with almost any propulsion load. My Li pack (probably yours too) rests right around 53V and stays above 50V with a 50A load.
Fair winds,
Eric
From ABYC's TE-30
"INTENT - This technical information report addresses AC and DC electrical systems used on boats alternating current (AC) systems operating at more than 300 VAC, but less than 1000 VAC, and direct current (DC) systems operating at more than 50 VDC but less than 1000 VDC, including battery banks, motors, and controllers for the purpose of propulsion."
--- In electricboats@yahoogroups.com, "Tom" <boat_works@...> wrote:
>
>
> A bit of thread drift:
>
> The last time our USCG rep visited us I asked him specifically about the "above 50V" specifications in the CFRs and the ABYC standards. Specifically, would they apply to a nominal 48VDC system that would charge to well over 50V?
>
> He said that the over 50V category was only meant to address AC installations. I thought this was strange, why not say so in the regs? It's not like anybody is running 55VAC house loads...
>
> -Tom
>
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