Common Ground MarineCommon Ground Marine
    Common Ground main distribution breaker panel in an engine room

    Coast Guard Approved · UL489 · Built to your load list

    Marine Breaker Panels

    AC panels, DC panels and fuse panels built around UL489 listed Carling circuit breakers, Blue Sea Systems distribution and Hoyt metering. Coast Guard, Navy, Army and Marine Corps builds, NEMA 4X enclosures, 46 CFR documentation. Any breaker count.

    Call for a custom panel quote(949) 646-9468

    Custom Panel Pricing

    What does your panel need to do?

    Tell us what the panel has to power and where it lives; we design, quote and build it to fit.

    Load list, drawing or photos (optional)Drop files here or browsePDF, JPG, PNG, GIF, WebP or AVIF · up to 6 files, 10 MB each

    Typical reply: We typically respond within one business day.

    • UL489 listed breakers
    • NEMA 4X enclosures
    • 46 CFR documentation
    • Carling AM2 sealed toggles
    • Engraved & bench-tested

    AC panels, DC panels and fuse panels

    Three kinds of distribution, one build standard. Most boats need two of them; inspected vessels usually need all three documented together.

    • 24 volt DC distribution panel with port and starboard battery voltage meters and labeled breakers

      DC breaker panels

      12 V and 24 V house distribution — pumps, lighting, electronics and windlass circuits on UL489 listed Carling breakers with Blue Sea Systems bussing and optional Hoyt volt and amp metering.

      Request a DC Panel
    • Common Ground 240V AC breaker panel with three double-pole breakers and engraved labels

      AC breaker panels

      120 V and 120/240 V shore power, generator and inverter distribution with double-pole mains, source selection, reverse-polarity indication and Hoyt AC metering. Combined AC/DC panels keep both in one engraved face.

      Request an AC Panel
    • Blue Sea Systems 12-circuit blade fuse block with labeled circuits

      Fuse Panels & Blocks

      Fused distribution for electronics, low-current branch circuits and high-amperage ANL, MRBF or Class T protection, built alongside or in place of a breaker panel on Blue Sea Systems fuse blocks.

      Fuse Panels & Blocks

    Prefabricated breaker panels

    Stock panels in the most-requested breaker counts are coming soon. Until then, these are the UL489 Carling breakers we build them from — the same parts that ship in every custom panel, in stock today.

    Shop All Circuit Breakers

    There is no limit on breaker count. These are the popular sizes; any count, AC, DC or combined, is built to order from your load list.

    How a custom panel comes together

    Prefer to talk it through first? Contact engineering.

    1. Send the load or circuit list

      Circuits, amperages, AC or DC, where the panel mounts and any standard it has to meet. Photos and drawings help.

    2. We draw the face and quote it

      Layout, breaker, switch or fuse selection, metering and enclosure, priced as one line so there are no surprises.

    3. Build, bench test, photograph

      Wired and labeled to your list, tested under load and photographed before it leaves the shop.

    4. Ship with documentation

      Wiring diagram and labeling schedule included; 46 CFR documentation package on request.

    Breaker panels for the vessels that get inspected.

    Every panel is protected by UL489 listed breakers and documented so the inspector, surveyor or contracting officer can verify it. Tell us the specification and we build to it.

    • Coast Guard breaker panels

      Coast Guard approved breaker panel builds: UL489 branch-circuit protection, labeled to the load list and documented for 46 CFR inspection.

    • Marine Navy breaker panels

      Navy support craft, patrol boats and shipyard refits. Ruggedized, sealed and built to the drawing with full traceability on every breaker.

    • Army breaker panels

      Landing craft, bridge-erection boats and watercraft fleets. NEMA 4X enclosures for exposed mounting; UL489 breakers throughout.

    • Marine military breaker panels

      Marine Corps and joint-service builds to UL489, NEMA 4X and 46 CFR requirements, with Carling AM2 sealed-toggle breakers, mil-spec hardware and corrosion-resistant enclosures.

    • Commercial & inspected vessels

      Workboats, passenger vessels and fishing fleets that have to satisfy 46 CFR and the surveyor who signs off on the electrical system.

    • Yachts & custom builds

      Main distribution and sub-panels with Blue Sea Systems bussing and Hoyt metering, engraved to your circuit list and tested before shipping.

    What goes into our custom breaker panels

    The same build standard whether the panel is headed for a Coast Guard cutter, an Army landing craft or a sportfisher.

    Send Your Load List
    • UL489 listed Carling circuit breakers sized to each circuit
    • Blue Sea Systems bussing and distribution
    • Hoyt analog or digital metering
    • Engraved labeling that matches your load list
    • NEMA 4X enclosure option for weather decks and washdown areas
    • 46 CFR documentation package on request
    • Bench-tested and photographed before it ships

    Questions we get asked

    Are your breaker panels Coast Guard approved?
    We build Coast Guard breaker panels around UL489 listed circuit breakers and document each panel (breaker ratings, wire sizes, labeling) so a Coast Guard inspector or surveyor can verify it against 46 CFR. Tell us the subchapter your vessel falls under and we build and document to it.
    What does UL489 mean on a marine breaker panel?
    UL489 is the safety standard for molded-case circuit breakers used as branch-circuit protection. Inspected and military vessels typically require UL489 listed breakers rather than UL1077 supplementary protectors, so every circuit in our panels is protected by a UL489 listed Carling breaker sized to its load.
    Can you build NEMA 4X breaker panels?
    Yes. For weather decks, engine rooms and washdown areas we build panels into NEMA 4X rated enclosures with sealed breaker boots and glands, so the panel stays protected from spray, hose-down and salt air.
    Do you build breaker panels for Navy, Army and Marine Corps vessels?
    We build marine military breaker panels for Navy, Army and Marine Corps support craft, patrol boats, landing craft and shipyard refits. Send the drawing or load list and any applicable specification (UL489, NEMA 4X, 46 CFR) and we quote to it, including Carling AM2 sealed-toggle breakers where the drawing calls for them.
    Do you build AC panels, DC panels and fuse panels?
    Yes. DC breaker panels for 12 and 24 V house loads, AC breaker panels for shore power, generator and inverter distribution (including combined AC/DC faces), and fuse panels for electronics and high-amperage ANL or Class T protection. Each is built, labeled and documented to the same standard.
    Do you sell prefabricated breaker panels?
    Prefabricated breaker panels in the most popular breaker counts are coming soon. There is no limit on breaker count: every panel is built to order from your load list today, usually quoted within one business day.

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