What is Fire Sealing? #
Fire sealing is the process of sealing gaps, openings and penetrations around an electrical switchboard or meter box using approved fire-resistant materials.
These products are designed to help slow the spread of fire and smoke while protecting the electrical installation.
Where cables enter a switchboard enclosure, larger openings should be properly sealed to help maintain the fire performance of the installation and comply with applicable standards.
Why is Fire Sealing Important? #
Fire sealing plays an important role in electrical safety by:
- Helping slow the spread of fire and smoke.
- Protecting electrical cables and equipment.
- Reducing the likelihood of fire spreading through wall cavities.
- Improving the overall safety of occupants.
- Assisting with compliance with relevant Australian Standards.
Even small gaps around cable entries can reduce the effectiveness of a switchboard enclosure if left unsealed.
Where is Fire Sealing Commonly Required? #
Fire sealing may be required where electrical cables pass through:
- Switchboards
- Meter boxes
- Fire-rated walls
- Fire-rated ceilings
- Fire-rated floors
- Electrical service penetrations
The type of fire seal used depends on the installation and the fire rating of the building element.
Common Issues Found During Electrical Safety Inspections #
Our licensed electricians commonly identify:
- Unsealed cable entry holes.
- Large openings around electrical conduits.
- Missing fire-resistant sealant.
- Damaged or deteriorated fire sealing.
- Cable penetrations that have been modified after the original installation.
- Excessive gaps around switchboards.
These issues may reduce the ability of the enclosure to contain fire and should be assessed by a licensed electrician.
What We Check During an Electrical Safety Inspection #
During an electrical safety inspection, our licensed electricians visually assess accessible electrical installations, including:
- Switchboards
- Meter boxes
- Cable entry points
- General condition of the enclosure
- Visible fire sealing around cable penetrations
- Signs of deterioration or damage
If defects are identified, recommendations will be included in the inspection report.
Can Fire Sealing Be Added Later? #
Yes.
Where appropriate, fire sealing can often be installed after electrical work has been completed, provided suitable fire-rated products are used and the installation complies with the relevant standards.
The correct product depends on:
- The size of the opening.
- The type of cable or conduit.
- Whether the wall or enclosure is fire-rated.
- Manufacturer installation requirements.
Frequently Asked Questions #
Is expanding foam suitable for fire sealing? #
Not all expanding foams are fire-rated. Only products specifically approved for fire-stopping applications should be used where required.
Is every gap around a switchboard a defect? #
Not necessarily. Small cable entry openings may be acceptable, while larger openings may require sealing in accordance with the relevant standards. A licensed electrician can determine whether corrective work is required.
Who can carry out fire sealing work? #
Where fire sealing forms part of an electrical installation, any associated electrical work should be undertaken by a licensed electrician. In some situations, specialist passive fire protection contractors may also be involved for fire-rated building penetrations.
Does fire sealing improve safety? #
Yes. Properly installed fire sealing helps reduce the spread of fire and smoke through openings around electrical installations, improving overall building safety.
Need an Electrical Safety Inspection? #
Rental Safety Inspections provides professional electrical safety inspections throughout Victoria.
Our licensed electricians inspect accessible switchboards, electrical installations and visible safety issues to help landlords and property managers maintain safe and compliant rental properties.
Contact us today to book your electrical safety inspection
