29/07/2025
The image you sent is a wiring diagram for a Blade Fuse Block, commonly used in automotive, marine, or other DC (Direct Current) applications. The title seems to have a typo ("WOEONG DIAGRAM" instead of "WIRING DIAGRAM").
Let's break down the connections and components:
Component:
* Blade Fuse Block: This is a centralized unit designed to hold multiple blade-type fuses, providing individual circuit protection for various loads.
* It has input terminals (at the top and bottom) and output terminals (sides).
* Each fuse slot has a corresponding input and output connection.
Input Connections:
* TO DC NEGATIVE (Top): This indicates the main negative (ground) connection point for the entire fuse block. It's designed to connect to the negative terminal of the DC power source (e.g., battery negative).
* From this main negative connection, there are multiple smaller terminals (the black ones at the top) where individual load negative wires can connect.
* FROMLOAD NEGATIV (Top, below TO DC NEGATIVE): This label, seen on both the left and right sides of the top section, is a bit confusingly worded. It seems to imply that the negative wires from the loads (appliances, lights, etc.) should connect here. Essentially, this is a negative distribution bar.
* FROMLOAD POSITIVE (Bottom): This label, seen at the bottom center and extending to the sides, indicates the main positive (live) connection point for the fuse block. This is where the main positive wire from the DC power source (e.g., battery positive) connects.
* From this main positive connection, there's an internal busbar (represented by the continuous red line running across the bottom terminals of the fuses) that distributes power to the input side of all the fuses.
Output Connections (from each fuse):
* Red Wires (FROM LOAD POSITIVE): Each red wire emerging from the sides of the fuse block represents the protected positive feed to an individual load. These wires connect to the positive side of various devices like lights, radios, pumps, etc.
* The label "FROMLOAD POSITIVE" here is also somewhat misleading; it should ideally be "TO LOAD POSITIVE" or "OUTPUT TO LOAD POSITIVE." It signifies the positive power going to a load, after passing through its respective fuse.
* White Wires (FROM LOAD NEGATIV): Each white wire emerging from the sides of the top section (where the black terminals are) represents the negative return path from an individual load. These wires connect from the negative side of the loads back to the fuse block's negative distribution bar.
Functionality:
* Positive Distribution: The main positive DC power comes into the "FROMLOAD POSITIVE" terminal at the bottom. This power is then distributed to the input side of each blade fuse.
* Circuit Protection: When a load is connected, its positive supply goes through one of the fuses. If an overcurrent (short circuit or overload) occurs in that specific load's circuit, the fuse will blow, breaking the circuit and protecting the wiring and the device.
* Negative Distribution: The main negative DC power comes into the "TO DC NEGATIVE" terminal at the top. The negative return wires from all the individual loads connect to the "FROMLOAD NEGATIV" terminals on the top black bar.
In summary: This blade fuse block provides a clean and organized way to distribute DC power from a single source to multiple individual loads, with each load having its own dedicated fuse for overcurrent protection and a common negative return path. The labels "FROMLOAD NEGATIV" and "FROMLOAD POSITIVE" could be clearer, but their placement strongly indicates input for the main positive/negative, and then outputs for the individual positive/negative load connections after fusion.
