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Subject: TWL: Low voltage at dock
From: Arild Jensen (elnav@XXX.XXX)
Date: Sat Aug 31 2002 - 13:49:37 EDT
Bob Otten wrote
> Three hot wires come all the way to the end of the dock, and 2 of them,
> alternating wires from post to post, are used to provide 125/250 50amp
> All have properly rated breakers.
> One of the few things that was done right in this marina was the wiring.
REPLY
One quick way to assess the quality of a marina's wiring, is to measure the voltage right at the breaker panel and then at the end of the dock.
If the voltage drop is within normal limits - less than 10% - then you can't blame the marina.
If the power utility company is not providing adequate quality power or voltage levels to the marina, then all the boats will suffer.
Technical solutions are becoming available. However, they do cost money.
Be aware that right across the country, power quality is diminishing as demand continue to rise while various factions fight to prevent the expansion of the existing power
generating facilities.
Three Mile Island still looms large in people's minds when discussions of nuclear power comes up.
Fossil fuel generating plants spew tons of sulphur and other toxic substances into the air which is already polluted. New plants are being fought hard.
Hydro electric dams are being blamed for a variety of ills including silting, fish stock declines and so on.
Bottom line is: while your shore power may vary, chances are it will get worse not better. Therefore you should consider how to design and equip your boat to cope with
it; even if this cost more.
Cheers
Arild
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