4 Gang M8 Power Distribution Block – Positive & Negative Bus Bar Set

Razorback DC 4 Gang M8 Power Distribution Block – Positive & Negative Bus Bar Set

Create a clean, organised high-current DC electrical system with the Razorback DC 4 Gang M8 Power Distribution Block, supplied as a matching positive and negative bus bar set.

Each distribution bar provides 4 × M8 connection studs, giving you a total of eight heavy-duty connection points across the positive and negative sides of your electrical system.

Designed for 12V and 24V DC applications, this compact distribution solution is ideal for lithium battery systems, inverters, fuse panels, DC-DC chargers, solar equipment, 4WDs, ute canopies, caravans and off-grid power systems.

Instead of stacking multiple cable lugs directly onto battery terminals, the M8 distribution blocks provide a dedicated central connection point for organising power distribution throughout the system.

⭐ Key Benefits

• Complete positive + negative distribution block set
• 4 × M8 studs per bar
• 8 total M8 connection points
• Heavy-duty M8 / 8mm terminal studs
• Suitable for 12V and 24V DC systems
• Helps organise high-current battery wiring
• Ideal for lithium battery installations
• Excellent for inverter systems
• Great for DC-DC charger wiring
• Suitable for fuse and circuit-breaker distribution
• Perfect for 4WD and ute canopy systems
• Ideal for caravans and campers
• Great for solar and off-grid setups
• Keeps battery terminals cleaner
• Makes future electrical upgrades easier

🔌 Positive & Negative Bus Bar Pair

The Razorback DC 4 Gang M8 Distribution Block includes two separate power-distribution bars:

1 × Positive Distribution Block

1 × Negative Distribution Block

This allows both sides of the DC electrical system to be organised through dedicated connection points.

A typical system may use:

Battery Positive → Fuse / Isolator → Positive Bus Bar

and

Battery Negative → Negative Bus Bar

Individual electrical circuits can then be connected to the appropriate distribution block.

🔩 4 × M8 Studs Per Bus Bar

Each distribution block provides:

4 × M8 / 8mm connection studs

giving you:

8 total stud connections across the pair

M8 studs are well suited to larger battery and power cables using appropriately sized ring terminals or cable lugs.

Typical cable connections may include:

• Battery cables
• Inverter cables
• DC-DC charger cables
• Fuse-box feeds
• Solar-controller connections
• Main earth cables
• Auxiliary power feeds

Always confirm that the cable-lug hole is suitable for an M8 / 8mm stud.

🔋 Ideal for Lithium Battery Systems

Modern LiFePO4 installations often have several cables that need to connect to the same battery bank.

These may include:

• Inverter
• DC-DC charger
• Solar controller
• Fuse box
• Battery monitor
• Auxiliary loads
• Main charging circuits

Rather than stacking numerous cable lugs directly on the battery terminals, the distribution blocks provide dedicated connection points.

As a result, the battery installation remains cleaner and easier to service.

⚡ Excellent for Inverter Installations

High-power inverter systems often require substantial battery cable.

The M8 distribution blocks can provide a central connection point between:

• Battery bank
• Main fuse
• Inverter
• Charger
• Other high-current equipment

For example:

Battery → Main Fuse → Positive Distribution Block → Inverter / Chargers / Accessories

and

Battery Negative → Negative Distribution Block → Inverter / Chargers / Accessories

The exact wiring arrangement should be designed according to the equipment and circuit requirements.

🚙 Perfect for 4WD & Ute Canopy Systems

Modern touring vehicles can contain complex auxiliary electrical systems.

The Razorback 4 Gang Distribution Block is ideal for:

• Lithium auxiliary batteries
• Ute canopy electrical systems
• Dual-battery installations
• Inverters
• DC-DC chargers
• Solar systems
• Fuse boxes
• Compressors
• Fridges
• Auxiliary accessories

By providing a central connection point, future electrical additions and troubleshooting become significantly easier.

🏕️ Caravan & Camper Applications

The distribution blocks are also ideal for caravan and camper electrical systems.

Suitable applications include:

• Lithium battery banks
• Inverters
• Solar controllers
• DC-DC chargers
• Fuse panels
• Main negative returns
• Battery chargers
• Auxiliary power circuits

This helps prevent large numbers of terminals from being stacked directly on battery posts.

☀️ Solar & Off-Grid Power Systems

Off-grid battery systems frequently require multiple high-current connections.

The M8 bus bar pair can help organise connections between:

• Batteries
• Solar charge controllers
• Inverters
• Battery chargers
• DC distribution boards
• Fuse protection
• Auxiliary equipment

Furthermore, separating positive and negative distribution points makes the electrical layout easier to understand and maintain.

🔧 Ideal for Centralised Power Distribution

A distribution block acts as a central junction point for the electrical system.

Instead of:

Battery → Multiple cables stacked on one battery terminal

you can create:

Battery → Distribution Block → Individual Circuits

This can provide:

• Cleaner wiring
• Easier cable routing
• Better serviceability
• Simpler fault finding
• Easier future expansion

🔴 Positive & ⚫ Negative Identification

The set includes dedicated positive and negative distribution blocks.

This makes it easier to keep the electrical system clearly separated and organised.

For best results, use:

• Red cable / identification for positive
• Black cable / identification for negative

Clear polarity identification is particularly important in larger battery and inverter systems.

📐 Compact Heavy-Duty Design

The current distribution-block assembly is approximately:

120mm × 50mm × 50mm

Its compact footprint allows it to be mounted inside:

• Battery compartments
• Ute canopies
• Electrical cabinets
• Caravan battery areas
• Power boxes
• Service bodies
• Off-grid enclosures

Always measure the actual product before drilling permanent mounting holes.

🔩 M8 Cable Lug Compatibility

These distribution blocks use M8 studs, so cable lugs should have approximately an 8mm mounting hole suitable for the terminal.

Razorback DC cable lugs are available in multiple cable sizes and stud-hole configurations.

For example:

35-8 = 35mm² cable with 8mm stud hole

70-8 = 70mm² cable with 8mm stud hole

Always match the lug barrel to the cable conductor size and the lug hole to the M8 stud.

🔥 Fuse Protection Is Still Required

A distribution block is not a fuse box and does not provide over-current protection by itself.

Positive circuits should still use correctly selected:

• MIDI fuses
• MEGA fuses
• ANL fuses
• T-Class fuses
• Circuit breakers

Protection should be selected according to:

• Cable size
• Electrical load
• Equipment requirements
• Cable length
• Installation conditions

In most battery systems, the main positive feed should also be protected appropriately near the battery.

⚠️ Current Capacity

The safe current capacity of the distribution block installation depends on more than the M8 stud size.

Factors include:

• Internal conductor construction
• Terminal material
• Cable size
• Cable-lug quality
• Contact resistance
• Ambient temperature
• Installation conditions
• Total connected load

Therefore, the M8 stud size should not be treated as an amperage rating.

Use the manufacturer's confirmed electrical rating when determining maximum load.

🛠️ Installation Tips

For a reliable installation:

1. Select a secure mounting position.
2. Keep positive and negative blocks clearly separated.
3. Use cable sized for the actual load.
4. Use correctly sized M8 cable lugs.
5. Crimp terminals with a suitable heavy-duty crimper.
6. Install appropriate fuse protection.
7. Tighten connections securely.
8. Avoid excessive terminal stacking.
9. Protect exposed positive terminals from accidental short circuits.
10. Recheck connections after initial operation.

High-current connections should remain clean, tight and mechanically secure.

🔍 Product Features

• Razorback DC 4 Gang Power Distribution Block
• Positive and negative bus bar pair
• 4 × M8 studs per block
• 8 total connection studs
• M8 / 8mm terminals
• Suitable for 12V / 24V DC systems
• Centralised battery power distribution
• Ideal for lithium battery systems
• Excellent for inverter installations
• Great for DC-DC charger systems
• Suitable for fuse-panel feeds
• Perfect for 4WD and ute canopies
• Excellent for caravans and campers
• Great for solar and off-grid systems
• Compact panel-mount design

• 📦 What's Included

  1 × Positive 4 Gang M8 Power Distribution Block

  1 × Negative 4 Gang M8 Power Distribution Block

  Including the M8 terminal hardware supplied with the blocks.