Extraneous conductive parts are the other metal parts which not form
a part the electrical installation.
Protection from electric shock provided basic protection and fault
protection.
. The structural steelwork the building,
gas, water and central heating pipes and radiators.
Definition
Exposed conductive parts are the met-
alwork the electrical installation.
Basic protection protection against electric shock under fault free con-
ditions and provided insulating live parts accordance with section
416 the IEE Regulations.
The conduit, trunking, metal boxes
and equipment that make the
electrical installation.
Protective equipotential bonding equipotential bonding for the purpose
of safety.
The conduit, trunking, metal boxes and equipment that make the elec-
trical installation.
Definition
Extraneous conductive parts are the
other metal parts which not form
a part the electrical installation.
To final circuits
30 ring main
15 water heater
5 lighting
Consumer’s equipment
Supply authority
equipment (sealed)
Meter to
register
energy used
by consumer
Service fuse
providing
means of
isolation
and
protection
Sealing
box to
terminate
cable
Service cable
E
Double-pole switch
providing means of
isolation and switching
N
Meter
Main protective earthing
terminal
FIGURE 6. The
structural steelwork the building,
gas, water and central heating pipes
and radiators.3 6.
Fault protection protection against electric shock under single fault con-
ditions and provided protective equipotential bonding and automatic
disconnection the supply (by fuse MCB) accordance with IEE
Regulations 411.Basic Electrical Installation Work
132
Exposed conductive parts are the metalwork the electrical installation.6
Simplified diagram connections and equipment domestic service position
