Code of Practice for the Electricity (Wiring) Regulations - 2009 Edition

• SELV, the source of SELV being installed outside Zones 0, 1
and 2. However, it is permitted to install the source of SELV
in Zone 2 if its supply circuit is protected by a RCD having the
characteristics specified in Code 11J;
• Automatic disconnection of supply, using an RCD having the
characteristics specified in Code 11J;
• Electrical separation, the source for electrical separation
supplying only one item of current using equipment, or one
socket outlet, and being installed outside Zones 0, 1 and 2.
However, it is permitted to install the source in Zone 2 if its
supply circuit is protected by an RCD having the
characteristics specified in Code 11J.
(iv) For a swimming pool where it is not possible to locate a socket
outlet or switch outside Zone 1, a socket outlet or switch,
preferably having a non-conductive cover or coverplate, is
permitted in Zone 1 if it is installed outside (1.25 m) from the
border of Zone 0, is placed at least 0.3 m above the floor, and
is protected by:
• SELV, at a nominal voltage not exceeding 25V a.c. r.m.s. or
60V ripple-free d.c., the source for SELV being installed
outside Zones 0 and 1, or
• automatic disconnection of supply, using an RCD having the
characteristics specified in Code 11J, or
• electrical separation for a supply to only one item of current
using equipment, the source for electrical separation being
installed outside Zones 0 and 1.
(d ) Other equipment
(i) In Zones 0 and 1, it is only permitted to install fixed current
using equipment specifically designed for use in a swimming
pool.
(ii) Equipment which is intended to be in operation only when
people are outside Zone 0 may be used in all zones provided
that it is supplied by a circuit protected according to
subparagraph (4) above.
(iii) It is permitted to install an electric heating unit embedded in the
floor, provided that it:
• is protected by SELV, the source of SELV being installed
outside Zones 0, 1 and 2. However, it is permitted to install
the source of SELV in Zone 2 if its supply circuit is protected
by an RCD having the characteristics specified in Code 11J, or
• incorporates an earthed metallic sheath connected to the
supplementary equipotential bonding specified in
subparagraph (3) above and its supply circuit is additionally
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