Introduction to Fire Safety Management

15.18.7 Integrity of referenced conductors – 
regulation 9
If a circuit conductor is connected to earth or to any 
other reference point, nothing which could give rise to 
danger by breaking the electrical continuity or introduc-
ing high impedance is allowed in the conductor unless 
suitable precautions are taken against that danger.
15.18.8 Connections – regulation 10
All joints and connections in a system must be both 
mechanically and electrically suitable for use. This 
includes all plugs, sockets, joints and terminals and 
must also take account of both the environmental condi-
tions and the location of the connections.
15.18.9 Means for protecting from excess 
current – regulation 11
Effi cient means shall be provided and suitable located to 
protect every part of a system from excess current as 
necessary to prevent danger. This covers short circuits 
and overloads and the usual means of protection is by 
fuses or circuit breakers.

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15.18.10 Means for cutting off the supply and 
isolation – regulation 12
Suitable means should be available for cutting off the 
supply to any electrical equipment and the isolation of 
any electrical equipment where necessary to prevent 
danger. In this context, isolation means the disconnec-
tion and separation of the electrical equipment from 
every source of electrical energy in such a way that this 
is secure and inadvertent reconnection is prevented.
Electrical equipment that is in itself a source of 
electrical energy (e.g. the windings of generators) is 
exempt from this requirement although precautions must 
still be taken to prevent danger.