Originally Posted by sailnow2011
I was in west marine
yesterday and browsing clearance as I always do.
I noticed the defunct 125 volt 50 amp plugs and inlets for super cheap
It got me thinking, instead of a 30 amp inlet plug, why not use a 50 amp inlet plug?
I have fried at least 3 inlets because of bad dock power. The 50 amp should have better contacts in the plug.
What do you think?
Change one wire end, and change the inlet.
If you replace the connector on the boat, someone may assume you have a 50A shore power
system (and even you may be tempted to connect it to one some day).
Enabling the supply of higher current
than the vessel wiring
is designed to take may cause a fire.
The most common cause of shore power
inlet burning is a worn out shore power cord connector. They don't last forever. Monitor
the connection every time it is connected. As soon as it starts to feel less tight, replace it. With normal use, disconnecting race
nights and weekends, a cord may only last 2 or 3 years. Stored in a locker for rare use, it may last indefinitely. A good rule
of thumb (in Southern Ontario
climate) is that as soon as it fades in colour (yellow ones) significantly, it is time to replace.
The second most common cause is a worn out vessel shore power inlet. They don't last for ever either, especially if one has repeatedly jammed a warn out or bent shore power cord connector into it.
The third most common cause of shore power inlet burning is faulty wiring
, and specifically DIY AC wiring that permits greater than rated current
from being drawn through the connection.
I replace vessel shore power inlets all the time, usually as the result of a reported insurance
or pre-purchase survey
deficiency. What may appear as slight discolouration on the outside, may be result of serious arcing and burning inside.
Never, ever, ever, defeat the current limiting breakers that are (or should be) on your vessel.
Never, ever, ever, install a second 30A shore power inlet, unless properly wired to provide isolation and current limiting protection from the existing shore power connection.
Personally, I wish the regulatory bodies would ban the manufacture and distribution of shore power connector ends for DIY replacement or cheater pigtail fabrication use. About 90% of the ones I see are done incorrectly or poorly, and could cause a marina fire costing $?M for the sake of saving maybe C$80.