Fact Sheet - Fire Sealing

Fire sealing typically involves using fire-resistant sealants, or fire-rated gaskets to seal any gaps or openings in the meter box. These materials are designed to expand and form a fire-resistant barrier when exposed to heat or flames, preventing the fire from spreading beyond the enclosed area.

Fire sealing of a switchboard meter box is important for several reasons:

Compliance with Building Codes and Regulations


Where a switchboard is enclosed in a case or surround, any wiring systems
entering the switchboard enclosure shall pass through openings that
provide a close fit.

An opening with less than 5 mm diameter of free space is considered to be a
close fit. Therefore, any opening of 5 mm diameter or greater requires
sealing with a fire-resistant sealant.


Clause 3.2.2 - Switchboards are to be checked that the fireproofing is in working order.

Clause 4.3 (i) - The switchboard is constructed and installed in such a manner that, in the event of a fire, the spread of fire will be kept to a minimum.

Containment of Fire
By sealing the gaps or openings in the meter box, fire sealing helps contain the fire within the box, limiting its spread to other parts of the building or structure.
Protection of Electrical Components

Switchboard meter boxes house electrical wiring, connections, and other components. Fire sealing helps protect these critical components, reducing the risk of electrical failures or electrical hazards during a house fire.

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