How To Use The Grounding Block?

The grounding block is an important component in electrical systems to ensure safety, used to connect equipment casings, metal structures, etc. to the ground to prevent electrical leakage or static electricity accumulation from causing danger. The following is the correct usage method for grounding blocks:

1. Confirm the installation location

Equipment casing or metal frame: Fix the grounding block on the metal casing or dedicated grounding position of the equipment.

Grounding busbar: In distribution boxes or control cabinets, multiple grounding blocks need to be connected to a unified grounding busbar.

Equipotential bonding point: In humid environments (such as bathrooms, kitchens) or lightning protection systems, it needs to be connected to the equipotential bonding terminal box.

2. Choose a suitable grounding wire

Material: Copper wire is preferred due to its good conductivity and corrosion resistance.

Specification: Select the cross-sectional area based on the current size. Generally, household equipment should have a cross-sectional area of 2.5mm ² or more, while industrial equipment should be selected according to design requirements.

Color: The yellow green dual color wire is a dedicated grounding wire to avoid confusion with other lines.

3. Installation steps

Clean the contact surface: Use sandpaper to polish the contact surface of the equipment casing or terminal board to remove the oxide layer.

Fixed terminal: Secure the grounding block to the equipment with bolts to ensure good contact.

Connecting wires: Insert the grounding wire into the terminal hole and tighten it with screws to avoid virtual connection.

Check firmness: Gently pull the wire to confirm that the connection is secure and not loose.

4. Testing and maintenance

Resistance test: After installation, use a grounding resistance tester to test. The grounding resistance should be less than 4 Ω (for household use) or according to the design value (for industrial use).

Regular inspection: Check the tightness of the terminals every six months, and promptly deal with any looseness or corrosion found.

precautions

Do not mix the grounding wire with the neutral wire.

Galvanized or stainless steel terminals should be used for rust prevention in humid environments.

The grounding block should be clearly marked to avoid accidental disassembly.

By standardizing the use of grounding blocks, the risk of electric shock can be effectively reduced, ensuring the safe operation of equipment.