Recent content by sanjuanjohn

NOAA's Coast Pilot No.7 is a very useful nautical guide to the coastal waters. Printed versions can also be purchased and the links are given on the same site. Here is the NOAA page: http://www.nauticalcharts.noaa.gov/nsd/cpdownload.htm

Ah, sorry for the confusion I see what you're saying. I don't have an adapter as there are so many different sockets I always just open the j-box (with the cord plugged in) and test at the breaker.

And to clarify, a clamp ammeter will show zero if there is zero draw, meaning no devices are using any electricity, or the draw is too low for a common meter to read.

If the "scale" is from galvanic action it may suggest that your boat is providing a connection to the marina's A/C earth grounding system allowing any stray voltage leaking from other boats to dissipate through yours. Isolating the two systems can be simple if the shore power is only used for...

An ammeter will tell you how many amps/milliamps are being drawn through the power cord. Any equipment that is on and functioning will add to the total. The meter will only read zero when there is no electron flow.