Relocation of grounding bar in distribution box

Relocating a grounding bar in a distribution box requires proper bonding, correct wire sizing, and adherence to electrical codes to ensure safety and low-resistance grounding. Key Considerations for Relocation1. Safety and Compliance Any work on the grounding system should be performed by a qualified electrician.

The grounding bar must maintain a continuous, low-resistance path to the main grounding system, typically less than 0. 1 ohm for industrial applications ( ). 2.

Selecting the Grounding Bar Choose a grounding bar that fits the enclosure and accommodates all grounding conductors. Options include small 4–8 position bars for limited circuits or multi-point tin-plated copper bars for larger distribution boxes ( ). Ensure the bar is mounted securely without interfering with other components.

3. Bonding the Relocated Bar When relocating, the new grounding bar must be bonded to the main ground bus. This can be done using a solid or stranded copper conductor, typically #4 AWG for 200A systems, ensuring that all grounds remain electrically connected ( ).

Use the provided bonding screws and tapped holes as specified by the manufacturer. 4.

Wire Connection and Sizing

Use yellow-green insulated copper wire for connections to the PE bar. Maintain the minimum cross-sectional area as required by local codes (e.g., 10 AWG in the US, 6 mm² elsewhere) ( ). Strip the wire properly, insert into the terminal, and tighten securely to prevent looseness.

5. Grounding Electrical Components All components inside the distribution box that require grounding should be connected to the relocated bar. This ensures safe operation and protection against electrical faults ( ).

6. Testing and Verification After relocation, measure the resistance between the grounding bar and the main grounding point. It should meet the required standard (typically