This is a 4-foot, 4AWG copper cable built to connect a BB175 connector to a 5/16" ring terminal lug. It's meant for ESS installers who need a fixed-length, factory-terminated jumper between a battery's 175A connector and a bus bar, lug, or terminal block — no field crimping required.
Field-tested ESS wiring depends on matched connector types and correctly sized lugs — mismatches are a common cause of loose connections, arcing, and nuisance faults. This cable pairs a BB175 connector with a 5/16" ring terminal on 4AWG copper conductor, rated to 175A and up to 392°F (200°C), so you get a factory-made link between battery and bus bar without introducing a weak crimp point in the field. 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.
Critical Fitment & Requirements
- Cable gauge: 4 AWG copper conductor.
- Cable length: 4 ft (122 cm) — fixed length, not field-adjustable.
- One end terminates in a BB175 connector (175A rated); the other end terminates in a ring terminal sized for a 5/16" lug/stud.
- Ampacity limit: 175A. NOT rated to exceed 175A continuous draw.
- Max rated temperature: 392°F (200°C) for the cable/terminal assembly.
- NOT compatible with connector types other than BB175 (e.g., Anderson, XT, or other proprietary connectors) without an adapter.
- NOT a fit for lug studs/bolts other than 5/16" — check your bus bar or terminal block bolt size before ordering.
Ring terminal connections at bus bars are a common source of resistive heating when the lug is under-torqued or the bolt size doesn't match the terminal — a loose 5/16" ring terminal on a 175A circuit can generate localized heat well before you'd see a fault code on your inverter or BMS. Torque the ring terminal to the bus bar manufacturer's spec using a digital torque wrench, and re-check torque after the first thermal cycle (24–48 hours of load). Verify the connection with a millivolt drop test across the lug using a multimeter — excessive voltage drop under load points to a loose or corroded joint before it becomes a thermal event. This lines up with NEC guidance on tightening electrical connections to manufacturer torque values rather than "hand tight plus a quarter turn" guesswork.
Key Benefits
- 4 AWG copper conductor sized for 175A connector ampacity.
- Factory-terminated BB175 connector and 5/16" ring terminal — no field crimping required.
- Rated to 392°F (200°C), giving thermal margin over typical continuous-duty cable insulation.
- Fixed 4 ft length simplifies layout planning for battery-to-bus-bar runs.
- Compact, lightweight assembly at 1.25 lb (0.57 kg) for easier routing in enclosures.
| Spec | Value | Unit |
|---|---|---|
| Connector Type | BB175 | — |
| Terminal Type | Ring Terminal | — |
| Lug Size | 5/16 | in |
| Cable Gauge | 4 | AWG |
| Cable Length | 4 (122) | ft (cm) |
| Weight | 1.25 (0.57) | lb (kg) |
| Ampacity Rating | 175 | A |
| Max Rated Temperature | 392 (200) | °F (°C) |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Fits: BigBattery systems and enclosures that use a BB175 connector on the battery side and a 5/16" bolt/stud on the bus bar or terminal block side.
- Fits: Applications requiring a 175A-rated, 4AWG jumper cable of 4 ft (122 cm) length.
- Does NOT fit: Systems using connectors other than BB175 (no adapter included).
- Does NOT fit: Terminal studs/bolts sized other than 5/16".
- NOT rated for continuous draw above 175A under any configuration.
Compliance & Environment
| Item | Rating/Note |
|---|---|
| Max Rated Temperature | 392°F (200°C) |
| Ampacity Limit | 175A |
| UL Listing | [NEEDS VERIFICATION] |
| IP Rating | [NEEDS VERIFICATION] |
FAQ
What size are the terminal lugs?
The ring terminal end is sized for a 5/16" lug/stud.
What gauge is this cable?
4 AWG copper conductor.
What is the maximum current rating for this cable?
175A, matching the BB175 connector rating.
Will this fit a connector other than BB175?
No. This cable is terminated specifically for a BB175 connector on one end and is not compatible with other connector types without a separate adapter.
How long is this cable?
4 ft (122 cm), fixed length.
Warranty & Registration
Manufacturer warranty terms for this cable are not detailed in the provided specifications. Please refer to the "Resources (System Manuals and Warranty)" Tab above on this page for the manufacturer's warranty documentation, or ask us before you order if you need confirmation on coverage.
