Newmar BB2 Bus Bar
Newmar BB2 Bus Bar — Product description
Heavy-Duty Power Distribution for Demanding DC Systems
When building or upgrading electrical systems in marine vessels, RVs, solar setups, or off-grid applications, reliable power distribution is non-negotiable. The Newmar BB2 series bus bars stand out as robust solutions for tying together multiple high-amperage DC circuits. Designed to handle up to 500 amps continuously, these bus bars simplify connections for large-gauge wires while prioritizing safety and longevity.
Unlike flimsy alternatives that overheat or fail under load, the BB2 lineup uses a solid 1/4-inch thick nickel-plated copper bar. This construction resists corrosion, ensures maximum conductivity, and supports 5/16-inch studs spaced 1 inch apart—perfect for 5/16-inch ring terminals on heavy cables like 2/0 or 4/0 AWG.
Standout Features That Deliver Real-World Performance
- Versatile Connectivity: Choose from models with pure stud configurations or hybrid options blending studs and #8 screws for mixing wire sizes seamlessly.
- Superior Materials: Nickel plating on copper bars fights oxidation in harsh environments, from salty marine air to humid RV storage.
- Safety First: Clear insulating covers snap on to shield against accidental shorts, while recessed conductive parts keep everything safe from the mounting surface.
- Modular Design: Keyed mounting bases allow stacking or pairing with compatible terminal strips, creating custom distribution panels without hassle.
- Easy Installation: Secure with standard #8 or #10 screws; compact footprints fit tight spaces like battery compartments or fuse blocks.
Model Comparison: Pick the Right Fit for Your Setup
Selecting the ideal bus bar depends on your circuit count and space constraints. Here's a breakdown to help you decide:
| Model | Connection Points | Base Dimensions |
|---|---|---|
| BB-2 | 2 x 5/16" studs | 3-1/16" x 1-1/2" |
| BB-2/8 | 2 x 5/16" studs + 8 x #8 screws | 6-1/16" x 1-1/2" |
| BB-5 | 5 x 5/16" studs | 6-1/16" x 1-1/2" |
| BB-8 | 8 x 5/16" studs | 9-1/16" x 1-1/2" |
All models rated for 500 amps. Compact 1-1/2" depth suits bulkhead or panel mounting.
Why These Bus Bars Excel in Tough Applications
In marine house banks, they consolidate inverter, alternator, and thruster feeds without voltage drop. RVers love them for linking lithium batteries to converters and chargers. Solar enthusiasts use them as clean ground points or positive manifolds in 48V arrays. The nickel plating shines here—copper alone corrodes fast in battery vapors or coastal exposure, but this setup maintains low resistance over years.
Pro tip: Torque studs to 75 in-lbs for optimal contact without stripping. Pair with marine-grade heat-shrink terminals to lock out moisture.
Installation Best Practices for Peak Reliability
- Position away from heat sources; copper dissipates well, but airflow helps.
- Use dielectric grease on contacts to repel corrosion without compromising conductivity.
- Balance loads across studs to avoid hotspots—monitor with a clamp meter initially.
- Interlock multiples for expandable systems; the keyed bases align perfectly.
- Always snap on the cover post-wiring; visibility through it confirms secure lugs.
Frequently Asked Questions
What makes the Newmar BB2 bus bars suitable for high-amperage DC systems?
Rated at 500 amps with 1/4-inch thick nickel-plated copper construction, they handle heavy loads from large wire gauges without overheating. The 5/16-inch studs accept robust ring terminals for secure, low-resistance connections.
How do the different BB2 models compare?
BB-2 offers two studs for simple setups. BB-2/8 adds eight #8 screws for mixed terminals. BB-5 provides five studs, and BB-8 eight for complex distributions—all on slim 1-1/2-inch deep bases.
Are these bus bars corrosion-resistant?
Yes, the copper bar is nickel-plated, ideal for marine, RV, or battery-heavy environments where oxidation is common. This maintains conductivity and prevents failures over time.
Can I mount multiple bus bars together?
Absolutely—the keyed mounting bases interlock securely, letting you build custom panels with terminal strips or additional BB2 units. Use #8 or #10 screws for a solid hold.
What's included for safety?
A clear protective cover prevents shorts and allows lug inspection. Conductive elements are recessed, protecting against mounting surface contact.
What wire sizes work best with these bus bars?
Optimized for large gauges like 2/0 to 4/0 AWG on studs, with #8 screws handling smaller circuits in hybrid models. Always match terminals to stud size.
Are they suitable for positive or negative bus use?
Yes, versatile as DC ground tie points or positive buses in house systems, inverters, or battery banks.
- Ideal as a DC ground tie point or positive bus, these heavy duty, 500 amp rated bus bar assemblies feature 5/16" studs on 1" centers in 1/4" thick copper bar for common connection/distribution of large wire gauges and accommodate 5/16" ring terminals.
- One combination model features two 5/16" studs and eight #8 screws, accommodating multiple size wire terminals.
- All bus material is nickel-plated copper.
- A clear insulating protective cover is provided to prevent short circuits and provide visibility of lugs.
- The mounting bases are keyed for interlocking and may be mated with the terminal strips (described above). Conductive parts are captured and recessed away from the mounting surface. Use #8 or #10 screws for mounting.
| Model | Qty. of 5/16" Studs | Base Size |
| BB-2 | 2 | 3 1/16" x 1 1/2" |
| BB-2/8 | 2 plus 8 - #8 screws | 6 1/16" x 1 1/2" |
| BB-5 | 5 | 6 1/16" x 1 1/2" |
| BB-8 | 8 | 9 1/16" x 1 1/2" |
These heavy-duty, 500 A rated current busbar assemblies are very suitable as DC ground connection points or positive bus bars, with 5/16"" studs on a 1"" center 1/4"" thick copper core...
SKU: NVN-1001152
MPN: BB2
UPC:
Technical specifications
| Brand | NewMar |
| Model | Newmar BB2 Bus Bar |
| SKU / MFR# | 1001152 |
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