Plug In Adapter From 30amp Pedestal to Extension Cord

[JeffreyAC77]

What is the proper description for this part? Want to run an extension cord from the 30amp shore power pedestal to an appliance.
thanks.

 

[scross]

You can get these almost anywhere. I call them pigtail adapters. 30 Amp male to 20 Amp female. About $65.
https://www.westmarine.com/marinco-mari ... -sQAvD_BwE

For about 2/3 that price you can get straight adapters. About $40.
https://www.amazon.com/Marinco-S30-15-P ... d_source=1

 

[Mastercraft]

Here is a less expensive one piece molded one on Amazon. $26

Marvine Cable Shore Power 30 Amp L5-30 Adapter (15M/30F, 30M/15F) 15 Amp Household Regular Inlet with Heavy Duty Construction & LED Indicator​

Mine works great

 

[Cutwater28GG]

I recommend anyone buy one of these ahead of time. Buying one in the local chandlery when it's urgent is typically eye-wateringly expensive.

 

[Submariner]

What is the proper description for this part? Want to run an extension cord from the 30amp shore power pedestal to an appliance.
thanks.

I recommend something like this. It's about 20 inches long, which lets you easily plug into a 3 prong 15amp pedestal and connect to the 30amp twist lock which will be laying on the ground.

10 Gauge l5-30r to 5-15p, 20 Inch 10AWG Power Cord Plug Adapter 15Amp 5-15P Male to 30Amp L5-30R Female with Twist Lock​

 

[watson1987]

I use this one all the time, normally keep it in my dock locker (only $20)

Amazon.com

I also keep one of these onboard if I ever get put in a slip with only 50amp

Amazon.com

 

[JeffreyAC77]

Covered - thanks for all the help.

 

[mlanger]

Someone here recommended buying an RV cable. Two things:
• RV Cables do not always match the connection points.
• I have learned the hard way that cheap, RV quality items simply cannot stand up to marine environments.

Do yourself a favor, spend the extra bucks, and buy a marine grade cable. It's better than buying an RV cable more than once.

 

[Akboaters]

Might be a dumb add-on question here, but…
We have large parts of our harbor (all transient moorage) with only 20 amp power available. Will one of the above suggestions work to adapt our 30amp shore power to the 20 amp pedestal? All locally available options are 30amp to 15amp, so I’ll have to order.


And, on 20 amp power, can I expect to be able to run my water heater and fridge for a night?

 

[scross]

Might be a dumb add-on question here, but…
We have large parts of our harbor (all transient moorage) with only 20 amp power available. Will one of the above suggestions work to adapt our 30amp shore power to the 20 amp pedestal? All locally available options are 30amp to 15amp, so I’ll have to order.


And, on 20 amp power, can I expect to be able to run my water heater and fridge for a night?

The Marinco adapters I referenced in my first reply are Marine grade. They are made to safely handle up to 20 amps coming in from the pedestal to your 30 amp boats shore power cord in a marine environment.
All the lights, refrigerator and most other cabin electrical are 12 volts dc and run off the house battery bank. The shore power runs the battery charger which should be able to keep up with most of the normal dc loads as it recharges the house bank.
The AC powered systems like the water heater, non-solar battery charger, microwave, coffee maker etc.will require more power and might exceed the 20 amps maximum coming into the boat from the pedestal. If that happens it will trip the breaker on the pedestal.
This is a way, way oversimplified explanation. See the Ranger Tug YouTube “As the prop turns” video series on Power Management for a more detailed explanation.

 

[AGLyme]

I very much appreciate the ATPTurns series, it helps me greatly with getting to know my new to me 31cb.
Solving all the mysteries except locating “Jimmy Hoffa” (the infamous Garmin black ball), and, the Water Heater.
I only have 30 amp service at my slip, I plug into “AC-1”, which powers the AC plugs, etc.
Here is the dumb question: I noted the water heater works when I run the boat. Will the water heater work if I fire up the generator a la the air conditioning ?
Thank you.