Description
Upgrade your classic MG with the plugpal MG Blade Fuse Box. This modern fuse box replaces the original Lucas 37H4727 and 37552 glass-fuse box. It changes the traditional glass cartridge fuses to modern automotive blade fuses.
Modern blade fuses offer several benefits for classic car owners. They are easy to identify, simple to replace and widely available. This makes them a practical upgrade for classic car restoration, maintenance and everyday driving.
The plugpal MG Blade Fuse Box keeps the original four-fuse layout. It also uses the existing wiring arrangement. This means you can modernise your fuse protection without changing the rest of your classic car’s electrical system.
Direct Replacement for Lucas 37H4727 and 37552
The plugpal MG Blade Fuse Box is designed as a direct replacement for the original Lucas 37552 fuse box, also known by the Lucas part number 37H4727. It provides a simple way to modernise the fuse protection on compatible classic MG and British vehicles without replacing the entire wiring system.
Key benefits include:
- Modern automotive blade fuse design
- Replacement for Lucas 37H4727 and 37552 glass-fuse boxes
- Uses readily available standard blade fuses
- Easier identification of fuse ratings
- Ideal for classic car restorations and electrical upgrades
- Helps simplify routine electrical maintenance
- Retains the familiar original fuse-box layout
- Suitable for use with a wide range of classic car wiring systems
This upgrade is especially valuable for classic cars where factory wiring was not designed for modern driving conditions.
Direct Replacement for Lucas 37552
The plugpal MG Blade Fuse Box features four 20A yellow blade fuses, providing a like-for-like replacement for the original fuse arrangement without requiring wiring alterations.:
- Four 20amp (yellow) blade fuses – like for like replacement, no wiring alterations required
- Dual 6.3mm Male Spade connections for inbound and outbound power on each fuse
- Bridged inbound connections on the first two fuses, as per original, identified by red line
- Measures 8.5cm x 5.5cm x 4.5cm
This makes the unit particularly suitable for classic MG restoration projects where maintaining the original electrical configuration is important while improving fuse availability and ease of maintenance.
Four 20A Blade Fuses
The fuse box uses four 20A yellow blade fuses. These provide a direct replacement for the original fuse arrangement.
Each fuse has dual 6.3mm male spade connections for the incoming and outgoing power supply. The first two fuse positions also feature bridged incoming connections. This matches the original Lucas fuse box arrangement.
The compact design makes the plugpal fuse box suitable for classic car electrical systems where space can be limited.
Why Upgrade to Blade Fuses?
Traditional Lucas fuse boxes use glass cartridge fuses. These fuses can become difficult to identify and source. Modern blade fuses are much easier to find.
You can buy blade fuses from most automotive factors and motor accessory shops. They also use a familiar colour-coded design. This makes it easy to check the fuse rating and find a replacement.
Keeping spare blade fuses in your classic MG is also simple. A small selection can save time if an electrical fault causes a fuse to blow while you are away from home.
Understanding 20A Blade Fuses and 35A Glass Fuses
The original glass fuses and modern blade fuses use different rating methods. Traditional glass fuses often show their blow current. Modern blade fuses normally show their continuous current rating.
For this reason, the original 35A glass fuse does not require a 35A blade fuse. This replacement uses a 20A blade fuse for the same application.
A 20A blade fuse can carry its rated current continuously. It will normally withstand a higher current for a short period before it blows. The exact operating time depends on the amount and duration of the overload.
Ideal for Classic MGs
The plugpal MG Blade Fuse Box suits a range of classic British sports cars and restoration projects. It is ideal for compatible models that use the original Lucas 37H4727 or 37552 fuse box.
Suitable applications can include:
- MGB
- MGC
- MG Midget
- Triumph Sprite
- Other compatible classic British vehicles
Always check your original fuse box and wiring before ordering to confirm compatibility.
A Practical Classic Car Electrical Upgrade
Replacing an old Lucas glass-fuse box with a modern blade-fuse unit makes electrical maintenance easier. You can quickly identify each fuse and find replacements almost anywhere.
The plugpal MG Blade Fuse Box also lets you retain the familiar four-fuse layout of the original system. It provides a discreet upgrade without unnecessarily changing the character of your classic MG.
Whether you are restoring an MGB, maintaining an MG Midget or improving the reliability of a classic British car, this Lucas 37552 replacement fuse box offers a simple and practical solution.
Upgrade your classic MG from glass fuses to modern blade fuses with the plugpal MG Blade Fuse Box.
Brian K. (Verified Purchaser) –
Seems well made and fitted easily