What is a yacht shore power extension cord?

A yacht shore power extension cord connects a boat or yacht to a marina shore-power pedestal, extending the reach between the dock outlet and the vessel inlet. Marine cords use NEMA locking or shore-power connectors such as L5-30 (30A 125V), SS1-50 (50A 125V) and SS2-50 (50A 125/250V), with heavy-gauge flexible cable and sealed, corrosion-resistant molded ends.

What shore power connector does my boat need: 30A or 50A?

Most boats up to about 40 feet use a 30A 125V L5-30 locking shore inlet, while larger yachts with multiple air conditioners use 50A service via the 4-prong SS2-50 at 125/250V (or SS1-50 for 50A 125V). Check the inlet on the boat and the pedestal rating; the extension cord must match both amperage and connector configuration.

Are marine shore power cords waterproof?

Marine cords use weather-sealed locking connectors and jackets rated for outdoor dockside exposure, commonly around IP65 against water jets and driving rain, and they resist oil, UV and salt corrosion. They are not designed to be submerged or to lie in standing bilge water; the locking ring and a weather cover at the pedestal should always be engaged.

Why do shore power cords use locking connectors instead of ordinary plugs?

Locking NEMA and SS-series connectors twist to lock so wave motion, wind, foot traffic and vessel movement cannot vibrate the cord loose, which would cause arcing or loss of shore power. The threaded sealing ring also keeps moisture out of the live connection, a key safety requirement in the wet marine environment.

Can you manufacture marine shore power extension cords to order?

Yes. Our shore-power cords are UL/cUL and ETL listed with RoHS, REACH and PAHS compliant materials, and can be supplied in 30A and 50A configurations with custom lengths, yellow or white marine jackets, LED indicators and corrosion-resistant hardware. MOQ is 200-1000 pieces; samples 7-15 days, production 15-20 working days.

Yacht Shore Power Extension Cords

NEMA TT-30P to NEMA TT-30R Power Extension Cords

RV Extension Cords, 30A NEMA TT-30P to 30 Amp NEMA TT-30R, 125V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 30 Amp - 125V

Plug Type:

NEMA TT-30P

Connector Type:

NEMA TT-30R

NEMA SS1-50P to NEMA SS1-50R Power Extension Cords

Yacht Shore Power Extension Cords, 50A NEMA SS1-50P to 50A NEMA SS1-50R, Twist Locking Plug, 125V/250V, use for Yacht Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

50A to 50A - 125V/250V

Plug Type:

NEMA SS1-50P

Connector Type:

NEMA SS1-50R

NEMA L5-30P to NEMA SS2-50R Power Extension Cords

Yacht Shore Power Extension Cords, 30A NEMA L5-30P to 50A NEMA SS2-50R, Twist Locking Plug, 125V/250V, use for Yacht Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 50A - 125V/250V

Plug Type:

NEMA L5-30P

Connector Type:

NEMA SS2-50R

NEMA L14-30P to NEMA 14-50R Power Extension Cords

RV Extension Cords, 30A NEMA L14-30P to 50A NEMA 14-50R, Twist Locking Plug, 125V/250V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 50A - 125V/250V

Plug Type:

NEMA L14-30P

Connector Type:

NEMA 14-50R

NEMA L14-30P to NEMA SS2-50R Power Extension Cords

Yacht Shore Power Extension Cords, 30A NEMA L14-30P to 50A NEMA SS2-50R, Twist Locking Plug, 125V/250V, use for Yacht Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 50A - 125V/250V

Plug Type:

NEMA L14-30P

Connector Type:

NEMA SS2-50R

NEMA SS2-50P to NEMA SS2-50R Power Extension Cords

Yacht Shore Power Extension Cords, 50A NEMA SS2-50P to 50A NEMA SS2-50R, Twist Locking Plug, 125V/250V, use for Yacht Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

50A to 50A - 125V/250V

Plug Type:

NEMA SS2-50P

Connector Type:

NEMA SS2-50R

NEMA TT-30P to NEMA L5-30R Power Extension Cords

RV Extension Cords, 30A NEMA TT-30P to 30A NEMA L5-30R, Twist Locking Plug, 125V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 30A - 125V

Plug Type:

NEMA TT-30P

Connector Type:

NEMA L5-30R

NEMA L14-30P to NEMA L14-30R Power Extension Cords

RV Extension Cords, 30A NEMA L14-30P to 30A NEMA L14-30R, Twist Locking Plug, 125V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 30A - 125V

Plug Type:

NEMA L14-30P

Connector Type:

NEMA L14-30R

NEMA L6-30P to NEMA L6-30R Power Extension Cords

RV Extension Cords, 30A NEMA L6-30P to 30A NEMA L6-30R, Twist Locking Plug, 125V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 30A - 125V

Plug Type:

NEMA L6-30P

Connector Type:

NEMA L6-30R

NEMA 5-20P to NEMA 5-20R Power Extension Cords

RV Extension Cords, 20A NEMA 5-20P to 20A NEMA 5-20R, 125V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

20A to 20A - 125V

Plug Type:

NEMA 5-20P

Connector Type:

NEMA 5-20R

NEMA L5-20P to NEMA L5-20R Power Extension Cords

RV Extension Cords, 20A NEMA L5-20P to 20A NEMA L5-20R, Twist Locking Plug, 125V, RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

20A to 20A - 125V

Plug Type:

NEMA L5-20P

Connector Type:

NEMA L5-20R

NEMA L5-30P to NEMA L5-30R Power Extension Cords

RV Extension Cords, 30A NEMA L5-30P to 30A NEMA L5-30R, Twist Locking Plug, 125V, use for RV Power Cords, Generator Extension Cords, Yacht Shore Power Adapter Cord Sets

Rating:

30A to 30A - 125V

Plug Type:

NEMA L5-30P

Connector Type:

NEMA L5-30R

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Have any Question?

Frequently Asked Questions

What is a yacht shore power extension cord?

What shore power connector does my boat need: 30A or 50A?

Are marine shore power cords waterproof?

Why do shore power cords use locking connectors instead of ordinary plugs?

Can you manufacture marine shore power extension cords to order?

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