07: 701 Locations Containing a Bath or Shower (240) Flashcards
If supplementary bonding is required for a location containing a bath or a shower, what would not require bonding (701.415.2 p.241)
a) Metallic pipes supplying water, gas etc
b) Metallic central heating pipes
c) Air conditioning systems
d) Metallic baths or shower basins
d) Metallic baths or shower basins
701.415.2 p241
Supplementary protective equipotential bonding:
Local supplementary protective equipotential bonding according to Regulation 415.2 shall be established connecting together the terminals of the protective conductor of each circuit supplying Class I and Class II equipment to the accessible extraneous-conductive-parts, within a room containing a bath or shower, including the following:
(i) metallic pipes supplying services and metallic waste pipes (e.g. water, gas)
(ii) metallic central heating pipes and air conditioning systems
(iii) accessible metallic structural parts of the building (metallic door architraves, window frames and similar
parts are not considered to be extraneous-conductive-parts unless they are connected to metallic structural
parts of the building).
Supplementary protective equipotential bonding may be installed outside or inside rooms containing a bath or shower, preferably close to the point of entry of extraneous-conductive-parts into such rooms.
Where the location containing a bath or shower is in a building with a protective equipotential bonding system in accordance with Regulation 411.3.1.2, supplementary protective equipotential bonding may be omitted where all of the following conditions are met:
(iv) All final circuits of the location comply with the requirements for automatic disconnection according to
Regulation 411.3.2
(v) All final circuits of the location have additional protection by means of an RCD in accordance with
Regulation 415.1.1
(vi) All extraneous-conductive-parts of the location are effectively connected to the protective equipotential
bonding according to Regulation 411.3.1.2.
NOTE: The effectiveness of the connection of extraneous-conductive-parts in the location to the main earthing terminal may be assessed, where necessary, by the application of Regulation 415.2.2.
Socket outlets are allowed in a location containing a bath, providing (701.512.3 p.242, 701.411.3.3 p.241 [415.1.1 p.73])
a) Located outside of zone 2
b) Located outside of zone 3
c) Located outside of zone 2 and protected by a 30 mA RCD
d) Located 3 meters from the edge of the bath (zone 1) and protected by 30mA RCD
d) Located 3 meters from the edge of the bath, (zone 1) and protected by 30mA RCD
701.512.3 p.242
Erection of switchgear, control-gear and accessories according to external influences. The following requirements do not apply to switches and controls which are incorporated in fixed current-using
equipment suitable for use in that zone or to insulating pull cords of cord operated switches.
In zone 0:
switchgear or accessories shall not be installed.
In zone 1:
only switches of SELV circuits supplied at a nominal voltage not exceeding 12 V AC rms or 30 V ripple-free
DC shall be installed, the safety source being installed outside zones 0, 1 and 2.
In zone 2:
switchgear, accessories incorporating switches or socket-outlets shall not be installed with the exception of:
(i) switches and socket-outlets of SELV circuits, the safety source being installed outside zones 0, 1 and 2,
and
(ii) shaver supply units complying with BS EN 61558-2-5.
Except for SELV socket-outlets complying with Section 414 and shaver supply units complying with
BS EN 61558-2-5, socket-outlets are prohibited within a distance of 3 m horizontally from the boundary of zone 1.
701.411.3.3 p.241
Additional protection by RCDs
Additional protection by the use of one or more RCDs having the characteristics specified in Regulation 415.1.1 shall be provided for low voltage circuits:
(i) serving the location
(ii) passing through zones 1 and/or 2 not serving the location.
415.1.1 p.73
The use of RCDs with a rated residual operating current not exceeding 30 mA is recognized in
AC systems as additional protection in the event of failure of the provision for basic protection and/or the provision for fault protection or carelessness by users.
All circuits in a location containing a bath or shower shall have (701.411.3.3 p.241 [415.1.1 p.73])
a) A disconnection time of 0.4s
b) Be installed at a depth of at least 50mm
c) Be installed using earthed conduit
d) Additional protection by a 30mA RCD
d) Additional protection by a 30mA RCD
701.411.3.3 p.241
Additional protection by RCDs
Additional protection by the use of one or more RCDs having the characteristics specified in Regulation 415.1.1 shall be provided for low voltage circuits:
(i) serving the location
(ii) passing through zones 1 and/or 2 not serving the location.
415.1.1 p.73
The use of RCDs with a rated residual operating current not exceeding 30 mA is recognized in
AC systems as additional protection in the event of failure of the provision for basic protection and/or the provision for fault protection or carelessness by users.
