Why is a shore power system inspection important?

A shore power inspection checks that your boat receives power from the marina without overheating, voltage drop or electrical leakage. Faulty shore power connections are a common cause of fires and equipment damage at the dock, and salt air speeds up the corrosion behind them.

What do you check during a shore power system inspection?

We inspect the shore power cord, plugs, inlet, breakers, wiring connections, grounding, polarity, and load balance. We also check for heat damage, corrosion, loose connections, and compliance with ABYC safety standards.

When should a shore power cord be replaced?

A shore power cord should be replaced if it shows signs of overheating, melted pins, cracked insulation, corrosion, discoloration, or intermittent power loss. In high-use marina environments, cords often need replacement every few years to maintain safety and reliability.

Can a bad shore power cord damage onboard equipment?

Yes. A damaged or undersized shore power cord can cause voltage drops, overheating, and unstable power delivery. This can damage sensitive electronics, battery chargers, inverters, air conditioning units, and other onboard systems.

Do you replace shore power inlets and connectors as well?

Yes, we replace shore power cords, inlets, plugs, and connectors as needed. We install marine-grade, corrosion-resistant components designed for saltwater environments and heavy marina use.

Is your shore power work compliant with marina and insurance requirements?

We inspect and replace shore power parts to ABYC standards and give you a written record of what we checked and replaced, which you can show your marina or insurer. Each marina and insurer sets its own requirements, so check with them what they need.

Do you provide service directly at the marina?

Yes. We inspect shore power systems and replace cords and inlets at your slip anywhere from Marina del Rey to Newport Beach, which lets us test under real load on the marina's power. A one-way trip fee by distance applies to each visit, from $30 in San Pedro to $110 in Newport Beach.

Marine electrician inspecting a corroded shore power inlet

Marine electrician inspecting a corroded shore power inlet (2)

Shore Power System Inspection & Cord Replacement

Faulty shore power connections are a common cause of boat fires at the dock. We inspect inlets for heat damage, replace weather-beaten cords, and retrofit boats with the SmartPlug system.

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$150 /hr

Labor estimate Usually 1–2 hours

Book sends us a ticket; nothing is charged online. Before any work you get a written estimate for labor, parts and the trip fee, and nothing is done without your OK.

Trip fee By distance, one way: $30 in San Pedro, $50 in Long Beach

San Pedro$30
Wilmington, Terminal Island$40
Long Beach: Shoreline, Rainbow Harbor$50
Long Beach Marina, Alamitos Bay$60
Redondo Beach$60
Seal Beach, Huntington Harbour$75
Marina del Rey$85
Newport Beach$110

Farther away: $25 plus $2.50 a mile, one way from our San Pedro shop. No trip fee when the boat comes to our shop, or for plan members. The work of a visit is at least $150; the trip fee is on top.

Registered in California: Breeze Marine Boat Service LLC, San Pedro
Where we work: At your slip from Marina del Rey to Newport Beach, or in our San Pedro shop
Questions first: (213) 693-0224 or submit a ticket

About this service

Fire Prevention

Stop the Burn.
Connect Safely.

Faulty shore power connections are a common cause of boat fires at the dock. Worn "twist-lock" plugs can overheat and arc without warning. We carry out a shore power inspection, then replace and modernize your connection to the grid.

The "Twist-Lock" Flaw

Standard marine electrical plugs and sockets rely on thin, curved metal blades. Over time, corrosion and vibration loosen these connections, creating electrical resistance (heat). If your plug handle looks brown or melted, it is a fire waiting to happen.

SmartPlug Upgrade

We strongly recommend a SmartPlug upgrade. It uses a pin-and-sleeve design with a much larger metal contact area than old plugs. It locks straight in (no twisting) and seals against water intrusion.

ELCI & GFCI Testing

Modern safety standards require an ELCI (Equipment Leakage Circuit Interrupter) near the inlet. We test the ELCI breaker to make sure it trips if dangerous current leaks into the water, which helps protect swimmers from shock.

The Safety Audit.

Identifying the danger zones.

Visual & Thermal Scan

We inspect the shore power inlet on your boat and the dock pedestal. We look for "browning" or melting around the pins, which indicates past overheating and arcing.

Cord Replacement

Sun and salt degrade cord jackets, leading to exposed wires. For shore power cord replacement, we supply high-quality, weather-resistant 30A and 50A marine cordsets to replace cracked or stiff cables.

Inlet Retrofit

We remove the old Marinco/Furrion inlet, check the internal wiring for heat damage (cutting back burnt wire if necessary), and install a new stainless steel SmartPlug inlet.

Load Test

We turn on AC loads (A/C, Water Heater) and measure voltage drop at the panel. High voltage drop means high resistance—a clear sign of a bad connection somewhere in the line.

Secure the Connection.

Before and after the upgrade.

Evidence of electrical arcing and heat damage on a standard marine NEMA L5-30P plug.

Close-up of a newly installed polished stainless steel SmartPlug shore power inlet on a boat hull.

Hazardous marine electrical connector (SS2-50) with significant corrosion and heat damage requiring replacement.

Standard Capacities.

We service all recreational power levels.

30 Amp 120V (3-Prong) - Common on boats under 40'

50 Amp 125/250V (4-Prong) - Larger Yachts/AC Loads

SmartPlug Retrofit Kits available for both 30A & 50A

Common Questions

Why is my cord plug hot?

It should never be hot. Warmth indicates resistance. This usually means the pins are corroded or the internal socket springs are worn out. Stop using it right away: switch off the pedestal and boat breakers, unplug the cord and call us for shore power repair.

Can I just sand the corrosion off?

No. Sanding removes the nickel plating, exposing bare brass which corrodes even faster. Once a plug is pitted or burnt, it must be replaced to prevent fire.

Don't Risk It.

Schedule a shore power safety inspection with a marine electrician in Long Beach.

Inspect My Plug

When a Shore Power Fault Needs Boat Electrical Repair

Heat damage rarely stops at the plug. It can spread into the wiring behind the inlet, and a worn cord or loose connection can make the ELCI breaker trip or cause lights to dim when the A/C starts. We treat these symptoms as a boat electrical repair job, tracing the fault from the dock pedestal through the cord and inlet to the panel instead of simply swapping parts.

Book an inspection if a plug feels warm, a socket looks discolored or loose, or a breaker trips at the dock.