BEP Marine's Pro Installer busbars bring multiple DC cable lugs to a common connection point. The 777-BB4S-500, 777-BB5S-650 and 777-BB8S-650 use one shared, high-current copper bar; the compact 777-Z10W-200 uses two stacked conductor rails for smaller terminations. That difference is important when choosing a busbar for an RV battery, inverter or electrical distribution project.
Stud busbars versus the compact Z-Bar
The drawing separates the three heavy-duty stud designs from the Z-Bar's two-rail arrangement. On each conventional model the stud locations share a conductive bar, whereas the Z-Bar rails can serve separate circuits unless connected using approved hardware and instructions.
Four large cable-lug points on one common bar. Schematic only; not to scale.
Five stud connections on a shared conductor. Schematic only; not to scale.
More stud positions; still 650A rated overall. Schematic only; not to scale.
Compact small-cable connections on separate upper/lower rails. Schematic only; not to scale.
Select the correct BEP part number
| Model | Connections | Published DC rating | Approx. length |
|---|---|---|---|
| 777-BB4S-500 | Four 8 mm (5/16 in) studs | 500A / 50V DC | 3.8 in |
| 777-BB5S-650 | Five 10 mm (3/8 in) studs | 650A / 50V DC | 5.8 in |
| 777-BB8S-650 | Eight 10 mm (3/8 in) studs | 650A / 50V DC | 9.8 in |
| 777-Z10W-200 | 10-way Z-style with two copper rails | 200A per rail / 50V DC | 3.8 in |
The heavy-duty three-model group has 50V DC ratings, tin-plated CDA102 copper conductors and stainless-steel stud hardware. The four-stud model uses 8mm (5/16-inch) threaded studs; the five- and eight-stud versions use 10mm (3/8-inch) studs. These are threaded stud sizes, not wire-gauge recommendations.
Busbars join conductors; they do not provide a disconnect switch or fuse protection. Use separately specified overcurrent protection for positive battery-fed circuits, and choose the mounting location, conductor sizes and terminal hardware for the actual RV system.
Matching BEP busbar product photos
Compare each exact model and its cable-connection count before ordering. These NewRVParts product links show current supplier-warehouse availability; items are not available for on-site viewing or pickup.
Factory diagrams and installation specifications
BEP's Pro Installer busbar specifications list the exact part numbers, electrical ratings and stud sizes. The modular footprint drawings show their relative space requirements and Z-Bar layout.