Guest - 400 Ground Plate

Reliable Grounding for Marine Applications

The Guest 400 Ground Plate is designed to provide superior grounding for marine electrical systems, ensuring optimal performance of onboard electronics while reducing RF interference. This highly efficient grounding solution is ideal for bonding, grounding, and Loran use, offering a direct, low-resistance path to enhance lightning protection. Constructed from sintered porous bronze, the plate delivers maximum conductivity in a compact design, making it an essential addition for any vessel seeking improved electrical reliability.

Technical Specifications

• Material: Sintered porous bronze
• Weight: 7.0 lbs
• Mounting Holes: 6-inch center-to-center spacing
• Mounting Hardware:
• One 3-inch gold-plated bolt and nut
• One 3-inch bronze bolt and nut
• Three copper washers
• Compliance: Conforms to ABYC standards

Product Dimensions

• Overall Size: 12.0" W x 3.0" H x 0.50" D

Key Benefits and Features

• Provides a highly conductive grounding path equivalent to 40 square feet of copper foil
• Enhances the performance of marine electronics by minimizing RF interference
• Effectively deters electrolysis and galvanic corrosion
• Designed with a low-drag, non-fouling shape for improved durability
• Simple installation with included mounting hardware
• Easy to maintain—can be cleaned with a wire brush

Available Variations

• 4012 – 12" x 3" | Equivalent to 40 sq. ft. of copper foil
• 4006 – 6" x 2" | Equivalent to 12 sq. ft. of copper foil
• 4008 – 8" x 2.5" | Equivalent to 20 sq. ft. of copper foil

The Guest 400 Ground Plate is the ideal choice for ensuring a strong and reliable grounding system onboard, offering superior conductivity and protection in a durable, marine-ready design.

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Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.

Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.

Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.

Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.

Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.

Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.

To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.

We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.