A  125V 30 amp Male to 125/250V Female Pigtail

This won't do what you think in North America, instead it will do
something dangerous in one way, and not do anything at all in another.

The 125V 30 amp Male plugs into the power source and will have three wires
in it, Black (Hot, providing 125 volts referenced to both neutral and to
Ground), White (Neutral, 0 volts referenced to ground) and Green (Ground).

The 125/250V Female Pigtail will have four wires, Black (Hot, providing 125
volts referenced to both neutral and to Ground), Red (also Hot, providing
125 volts referenced to both neutral and to Ground and 250 volts referenced
to the Black, but 180 degrees out of phase with the black, because it is
tapped off the opposite end of the transformer, with the neutral tapped at
the halfway point, halfway between red and black), White (Neutral, 0 volts
referenced to ground) and Green (Ground).

So look at the source, it only has 125 volts to start with so you aren't
going to get more than that.  If you connect the red and black in the
female, to the black in the male (i.e. bring two legs of the same 125 Volts
into a 250 volt system) you will get 0 volts in any 250 volt circuit on
your boat. The 110 volt circuits on your boat will generally do what you
expect, and deliver 110 volts.  Depending on exactly how your boat is
wired, you may end up with more current in some of the neutrals on your
boat that they are sized to carry, so may create a fire risk.

Ken Heaton
(An electrician in one of my other lives)



On Fri, 21 Jul 2023 at 20:19, Stu via CnC-List <cnc-list@cnc-list.com>
wrote:

> Check out an RV parts dealer.  They have all kinds of adapters.
>
> Stu
> Please show your appreciation for this list and the Photo Album site and
> help me pay the associated bills.  Make a contribution at:
> https://www.paypal.me/stumurray
> Thanks for your help.
> Stu
Please show your appreciation for this list and the Photo Album site and help 
me pay the associated bills.  Make a contribution at:
https://www.paypal.me/stumurray
Thanks for your help.
Stu

Reply via email to