The electrical earthing system is an important part of protecting people from electric shock. If a fault occurs, the earthing system provides a path for fault current and helps protective devices operate correctly.
Because the main earthing conductor is a critical part of the electrical installation, it needs to be clearly identified at the connection to the main earth electrode.
What Is the Main Earth? #
The main earthing system connects the electrical installation to earth and forms an important part of the property’s electrical safety system.
The main earthing conductor connects the installation’s earthing system to the main earth electrode.
The earth electrode may be located in or around areas such as:
- Near the main switchboard
- Meter boxes
- External walls
- Ground-level electrical service areas
- Other locations associated with the electrical installation
The exact arrangement depends on the property and electrical installation.
Why Does Main Earth Labelling Matter? #
The main earthing conductor is an important safety component and should not be disconnected without appropriate electrical procedures being followed.
A clear warning label helps identify the conductor and alerts anyone working near the earth electrode that it must not be disconnected.
The Australian/New Zealand Wiring Rules require the main earthing conductor to have a permanent label at its connection to the earth electrode, with a warning against disconnection.
What Should the Label Say? #
The required warning is:
WARNING: MAIN ELECTRICAL EARTHING CONDUCTOR – DO NOT DISCONNECT
The label needs to be permanent and legible so that it can be clearly read by anyone who may work on or near the electrical installation.
Common Main Earth Labelling Problems #
During electrical inspections, issues can include:
- Missing earth warning labels
- Labels that have become faded or illegible
- Damaged labels
- Labels that are difficult to read
- Incorrect identification
- Labels that have deteriorated due to outdoor exposure
A missing or damaged label should be assessed by a licensed electrician.
Why Is the Main Earth Important? #
The earthing system helps provide a safe path for electrical fault current.
Energy Safe Victoria identifies testing of the continuity of the earthing system and earth resistance of the main earthing conductor, protective earthing conductors and bonding conductors as part of electrical verification testing.
This highlights the importance of maintaining the earthing system and ensuring it remains suitable for its intended purpose.
Main Earth Labelling and Victorian Rental Properties #
Victorian rental providers must ensure an electrical safety check of the property’s electrical installations, fixtures and fittings is conducted every two years by a licensed electrician.
During an electrical safety check, the electrician assesses the electrical installation in accordance with the applicable requirements, including visual inspection and appropriate testing.
If a main earth identification issue is found, the electrician can determine whether the label requires replacement or whether further investigation is necessary.
Don’t Disconnect the Main Earth #
The main earthing conductor is an important safety component.
It should never be disconnected, altered or tampered with by a tenant or unqualified person.
If the earth electrode, main earthing conductor or its identification label appears damaged or incorrect, arrange for the installation to be assessed by a licensed electrician.
Book an Electrical Safety Inspection #
Rental Safety Inspections provides professional electrical safety inspections for rental properties throughout Melbourne and surrounding areas.
Our licensed electricians inspect switchboards, main earthing systems, safety switches (RCDs), wiring, fixtures and fittings to help identify electrical defects and safety issues that may require attention.
Contact Rental Safety Inspections today to arrange your electrical safety inspection.
