![EG4 | 600A | Buss Bar w/12 - 5/16" Bolts [Red] | EG4BUSBAR600ARD](https://cdn11.bigcommerce.com/s-6fklyl9bzq/images/stencil/1280x1280/products/10482/64869/EG4BUSBAR600ARD__90549.1789194085.jpg?c=1 "EG4 | 600A | Buss Bar w/12 - 5/16\" Bolts [Red] | EG4BUSBAR600ARD")
![EG4 | 600A | Buss Bar w/12 - 5/16" Bolts [Red] | EG4BUSBAR600ARD](https://cdn11.bigcommerce.com/s-6fklyl9bzq/images/stencil/500x659/products/10482/64869/EG4BUSBAR600ARD__90549.1789194085.jpg?c=1 "EG4 | 600A | Buss Bar w/12 - 5/16\" Bolts [Red] | EG4BUSBAR600ARD")
This is a 600-amp rated bus bar with 12 pre-drilled terminal positions for 5/16" bolts, used to consolidate multiple battery or inverter cable connections into a single low-resistance distribution point. It's built for installers wiring parallel battery banks or multi-inverter ESS setups who need a dedicated positive or negative bus point rated for high continuous current.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
A bus bar is only as good as its ability to hold current without heating up at the joint. At 600 amps continuous, contact resistance at each of the 12 terminal positions matters more than the bar material alone — loose or undersized lugs at any one of those 12 points can create a hot spot even if the rest of the connections are solid. This part is intended for use as a dedicated distribution point in DC battery or inverter wiring, not as a substitute for a properly rated disconnect or breaker.
- Ampacity: rated for 600A continuous
- Terminal count: 12 positions
- Bolt size: 5/16" per terminal position
- Finish/color: Red
- NOT compatible with cable lugs drilled for M8 or M10 bolts — hole size mismatch will prevent proper bolt torque and create a resistive joint
- NOT rated for continuous draw above 600A
- NOT a substitute for a DC disconnect, fuse, or breaker — this is a distribution point only
The technical friction: with 12 separate lug positions on one bar, it's easy to torque some connections properly and under-torque others during a rushed install — an inconsistent bolt-down across the bar creates uneven current sharing and localized heating at the weakest joint. The long-term prevention: torque every one of the 12 terminal bolts to the lug manufacturer's spec, not just "snug," so no single connection point runs hotter than the rest under a 600A load. The expert validation: check every bolt with a digital torque wrench after initial installation, and re-check after the first thermal cycle (a few days of charge/discharge) since hardware can loosen slightly as connections settle. The professional standard: undersized or unevenly torqued lug connections on high-ampacity bus bars are a documented cause of localized overheating — verify against your cable lug manufacturer's torque spec and NEC guidance on terminal connections before energizing the system.
- Solid bus bar construction intended for high-ampacity DC distribution
- 12 discrete terminal positions allow multiple parallel cable connections to a single bus point
- 600A rating supports multi-battery or multi-inverter parallel configurations within that limit
- Red finish for positive-conductor identification in DC wiring layouts
| Spec | Value | Unit |
|---|---|---|
| Ampacity limit | 600 | A |
| Terminal bolt size | 5/16 | in |
| Terminal position count | 12 | positions |
| Color | Red | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
- Fits: cable lugs with ring terminals drilled for 5/16" bolts, used in EG4 battery and inverter DC distribution wiring rated up to 600A
- Fits: multi-battery or multi-inverter parallel setups needing a dedicated positive (or negative) bus point
- Does NOT fit: cable lugs drilled for M8 or M10 bolts
- Does NOT support: continuous current draw exceeding 600A
- Does NOT include: a disconnect, fuse, or breaker function — use appropriate overcurrent protection upstream
| Compliance Item | Detail |
|---|---|
| UL Listing | [NEEDS VERIFICATION] |
| NEC Ampacity Reference | Confirm connected cable ampacity meets or exceeds 600A per NEC conductor sizing tables |
| IP Rating | [NEEDS VERIFICATION] |
FAQ
What size are the terminal lugs on this bus bar?
This bus bar uses 12 bolt positions sized for 5/16" bolts. Your cable lugs need ring terminals with a 5/16" bolt hole to fit correctly.
What is the maximum current rating for this bus bar?
It is rated for 600 amps. Do not use this bus bar in an application where continuous current draw across it exceeds that rating.
Is this the positive or negative bus bar?
This unit is finished in red, which typically denotes a positive DC bus bar in battery/inverter wiring. [NEEDS VERIFICATION] - confirm polarity convention against your system's wiring diagram before install.
Will this fit my inverter's existing bolt pattern?
This bus bar is a standalone 12-position distribution block. Confirm your enclosure or panel mounting hole spacing separately, as mounting dimensions are not specified by the manufacturer for this listing.
Warranty & Registration: Manufacturer warranty terms for this bus bar are not specified in the data provided. [NEEDS VERIFICATION] Refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's warranty documentation. Contact MSSD if you need help locating the correct warranty terms before you order — we always reply back.
