According to the requirements of the Electrical
and Mechanical Services Department (EMSD),
for fixed electrical installations in general
residential or commercial premises, if the
permitted load exceeds 100 amperes,
the installation must undergo inspection,
testing, and obtain a WR2 Certificate
at least once every five years.
The periodic inspection of communal fixed
electrical installations in buildings generally
includes the main supply switchgear, rising
mains, floor distribution boards and
sub-circuits, earthing systems, equipotential
bonding, etc. In newer building estates and
clubhouses, the communal fixed electrical
installations may also include main switchboards,
emergency generators, supply facilities for lifts,
fire protection equipment, water pump
installations, lightning protection systems,
and security equipment.
法律要求：不按期進行檢驗和保留有效WR2證書即屬違法。
保險有效性：若發生電器火災，保險公司有權查閱有效的
WR2證書，否則可能拒絕賠償。
生命安全：預防因電線老化、接地失效、保護裝置失靈
引致的觸電、火災事故。
財產保障：確保商業運作或日常生活不受電力故障影響。