Blue Sea Systems DualBus Common BusBar, 100A, 300V AC, 48V DC, #8-32 Screw Terminals, Tin-Plated Copper

Overview

The Blue Sea Systems DualBus 100A BusBar is a compact common bus bar range that places positive and negative distribution on one block for cleaner wiring in a boat electrical system. It is rated for 100A continuous service, with maximum voltage ratings of 300V AC and 48V DC, so it fits common 12V and 24V DC installations while leaving room for systems up to 48V DC.

Each version uses #8-32 screw terminals and a tin-plated copper CDA 110 / UNS 11000 bus, with a UL 94-V0 rated glass-reinforced thermoplastic base. The layout is useful behind helm panels, inside consoles, in cabin electrical lockers, or near grouped equipment where both feed and return connections need to stay organized and easy to inspect.

Key features

• DualBus layout combines positive and negative buses on one block to reduce wiring clutter in confined marine electrical spaces.
• 100A continuous rating supports small to mid-size branch circuit distribution points when installed with proper upstream circuit protection.
• Rated for up to 300V AC and 48V DC, covering common 12V and 24V boat systems.
• #8-32 screw terminals provide secure ring-terminal connections, with a specified screw terminal torque of 15 in-lb.
• Tin-plated copper CDA 110 / UNS 11000 bus material supports good conductivity in marine electrical installations.
• UL 94-V0 rated glass-reinforced thermoplastic base helps keep the block stable in protected electrical compartments.
• CE and UKCA marked for regulated installations where recognized product compliance matters.

Variants

This DualBus range is offered in two circuit counts, allowing the same basic bus bar format to match different amounts of wiring at the helm, panel, or equipment location.

Both variants share the 100A continuous rating, 300V AC and 48V DC maximum voltage ratings, #8-32 screw terminal type, tin-plated copper bus material, UL 94-V0 glass-reinforced thermoplastic base, 15 in-lb terminal torque, and 5/8 in height.

• 2701: 5 circuit configuration with 5 screw terminals per bus. Its 1.830 in by 3.012 in footprint works well where only a small group of positive and negative connections needs a tidy landing point.
• 2702: 10 circuit configuration with 10 screw terminals per bus. Its 1.830 in by 5.060 in footprint gives more termination points for grouped electronics, accessories, or panel wiring in the same area.

Installation and setup

The mounting holes accept #10 screws, giving the installer a straightforward way to fasten the block to a panel board, backplate, or other protected mounting surface. Keep cable runs supported so vibration is not carried by the terminal screws, and use ring terminals sized for the conductor and the #8-32 screw connection.

Because the bus and terminals are accessible, the block should be installed where accidental contact, spray, and loose gear are controlled. In layouts where the terminals may be exposed during normal use or service, a suitable insulating cover should be considered as part of the installation.

Electrical and system integration

This bus bar is meant for organized distribution, not for circuit protection by itself. Feed circuits should be protected by correctly sized fuses or breakers upstream, and conductor sizing should match the load, run length, temperature conditions, and the vessel's electrical standards.

For boat owners refitting a helm panel, adding electronics, or cleaning up scattered accessory wiring, the DualBus format keeps the positive and negative sides close together without mixing them. That makes later troubleshooting easier because both sides of each circuit can be traced in the same area.

Materials and maintenance

The tin-plated copper bus material helps maintain conductivity in the marine environment when the installation is kept dry and protected. During seasonal service, check that terminal screws remain properly tightened, look for corrosion or heat discoloration, and confirm that conductors are strain relieved and not pulling against the screw terminals.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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