3.4).Electrical installations and wiring systems
345
Telecommunications cables are Band circuits and must segregated
from Band circuits containing mains cables (IEE Regulations 528.1).512.2).3).512. 14.7 (IEE
Regulation 411.415.
Note: Local supplementary equipotential bonding may additional
requirement the ‘Local Authority’ regulations in, for example, licensed
premises, student accommodation and rented property.
Bathroom installations
Rooms containing fixed bath tub shower basin are considered area
of increased shock risk and, therefore, additional regulations are specified
in Section 701 the IEE Regulations.
Zone the bath tub shower basin itself, which can contain water and
is, therefore, the most dangerous zone
Zone the next most dangerous zone which people stand water
Zone the next most dangerous zone which people might con-
tact with water
.
Zones for bath and shower rooms
Locations that contain bath shower are divided zones separate
areas shown Fig.63. See Zones for bath and shower rooms
below.4).
● Local supplementary equipotential bonding (IEE Regulation 701.3.
● There are restrictions where appliances, switchgear and wiring
accessories may installed. This reduce the risk electric
shock people circumstances where body resistance lowered because
of contact with water.411.1. 6. The regulations can summarized follows:
● Socket outlets must not installed and provision made for
connection portable appliances unless the socket outlet can be
fixed metres horizontally beyond the zone boundary within the
bath shower room (IEE Regulation 701.
● Only shaver sockets which comply with 60742, that is, those
which contain isolating transformer, may installed zone
2 outside the zones the bath shower room (IEE Regulation
701.2)
must provided all gas, water and central heating pipes addition,
to metallic baths, unless the following two requirements are both met:
(i) all bathroom circuits, both lighting and power, are protected by
a 30mA RCD and
(ii) the bath shower located building with protective
equipotential bonding place described Fig.
● All circuits bath shower room, that both power and lighting,
must additionally protected RCD having rated maximum
operating current 30mA (IEE Regulation 701
