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:
AS3000
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.
AS3019
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.
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.