OEX ACX3160 400A Red/Black Heavy Duty Bus Bar Box

OEX ACX3160 400A Heavy Duty Bus Bar Box Red and Black 8x M10 Stud Terminals Glass Fibre Reinforced Nylon 48V DC

The OEX ACX3160 is a 400A heavy duty bus bar box combining a red positive bus bar and a black negative bus bar in a single enclosed unit. Eight M10 (3/8") stud terminals four red and four black provide a structured, high-current distribution point for 12V, 24V and 48V DC electrical systems. Glass fibre reinforced nylon enclosure with three sides open for unobstructed wiring access. 168x80x40mm. Also available in a 600A version as the ACX3162. Covered by a one year warranty.

Product overview

A bus bar box provides a centralised, organised distribution point for multiple positive supply and negative return connections in a DC electrical system. Rather than stacking multiple ring terminals on a battery terminal or scattering individual stud terminals across the installation, the ACX3160 consolidates up to four positive supply circuits and four negative return circuits at a single purpose-built enclosure, keeping the installation clean, reducing heat at connection points and making future maintenance and troubleshooting easier.

The 400A maximum continuous rating and 48V DC voltage rating cover 12V, 24V and 48V systems including lithium battery banks and solar storage installations. The glass fibre reinforced nylon enclosure provides heavy duty mechanical strength, electrical insulation and durability in underbonnet, marine and caravan environments. Three sides of the box are open for unobstructed wiring access from multiple directions. At 168x80x40mm it suits underbonnet, dual battery and caravan electrical panel installations. For higher current requirements, the ACX3162 provides a 600A alternative.

Features and benefits

400A maximum continuous rating: Suited to high-current main supply and earth distribution in dual battery systems, inverter installations and multi-circuit accessory panels. Total combined current across all positive (or negative) connections must not exceed 400A continuous.

48V DC maximum operating voltage: Compatible with 12V, 24V and 48V DC systems including lithium battery banks and solar storage installations.

8x M10 (3/8") stud terminals four red, four positive, four black, four negative: Accepts M10-compatible ring terminals (10.5mm ID or larger) for secure, torque-resistant connections across up to four positive and four negative circuits simultaneously.

Red and black combined: Both positive and negative bus bars in a single unit for a matched, colour-coded distribution point with instant polarity identification.

Glass fibre reinforced nylon construction: High mechanical strength, electrical insulation and resistance to heat and impact in demanding automotive, marine and caravan environments.

Three sides open: Unobstructed wiring access from three directions for flexible cable routing and clean cable dressing.

168x80x40mm: Compact footprint suited to underbonnet, panel and caravan installation spaces.

Also available in 600A: The ACX3162 is a 600A version for higher-current applications.

One year warranty: Covered by a one year OEX warranty.

Technical specs

Goes well with

OEX ACX3057 Ring Crimp Terminal 10.5mm ID Blue, suits M10 stud, pack of 100

OEX ACX3057BL Ring Crimp Terminal 10.5mm ID Blue, suits M10 stud, pack of 14

OEX ACX3162 600A Heavy Duty Bus Bar Box (higher current alternative)

Frequently asked questions

What is a bus bar box used for? A bus bar box provides a centralised, organised distribution point for multiple positive supply and negative return connections in a DC electrical system. Rather than stacking ring terminals on a battery terminal or using individual stud terminals, a bus bar box accepts multiple cables at a purpose-built enclosure, keeping the installation clean and making future maintenance and troubleshooting easier.

How many circuits can this bus bar support? The ACX3160 has four red positive studs and four black negative studs, allowing up to four positive supply circuits and four negative return circuits to be connected simultaneously. The total combined current across all positive (or all negative) connections must not exceed 400A continuous.

What ring terminal size suits the M10 studs? The M10 studs are 10mm in nominal diameter and require ring terminals with a 10.5mm or larger ID hole. The OEX ACX3057 (10.5mm ID, blue, pack of 100) and ACX3057BL (pack of 14) are suitable options. Always confirm the ring terminal ID matches the stud diameter before purchasing.

What is the maximum voltage for this bus bar? The ACX3160 is rated to 48V DC maximum operating voltage, making it suitable for 12V, 24V and 48V systems including lithium battery banks and solar storage installations.

Is a higher current version available? Yes. The OEX ACX3162 is a 600A version of this bus bar box for applications requiring higher continuous current capacity.