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klik.system | Specification guide to prefabricated wiring systems
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BS 8488 requires that prefabricated wiring systems shall
incorporate installation couplers that conform to
BS EN 61535. (BS EN 61535 has replaced BS 61535). The
installation coupler is defined as being not intended to be
engaged or disengaged under load or to be engaged or
disengaged other than during first installation, during
maintenance or during re-configuration of the installation
Installation couplers complying with BS EN 61535 provide
confidence that they are designed and constructed so that, in
normal use, their performance is reliable and without danger
to the user or damage to the surroundings.
BS 8488 lists a number of products that Installation couplers
are not intended to be used in place of e.g. luminaire
supporting couplers and on load connecting devices to
BS 5733.
A prefabricated wiring system will frequently require
arrangements to facilitate convenient on-load isolation and
switching off for mechanical maintenance of luminaires.
The use of computer controlled luminaires and other
automatic lighting control systems has introduced further
complications to the safety issues related to isolation and
mechanical maintenance.
It is essential that the on-load connection device for
luminaires is suitable for the prescribed load characteristics
e.g. inductive and tungsten loads. A connection device that
complies with BS 5733, including its inductive and tungsten
load tests would be appropriate.
Therefore, it is an advantage to use a system which provides
a convenient on-load connection method that complies with
both BS EN 61535 and BS 5733 (see figure 11). However, it is
not necessary for the home run distribution connector to be
suitable for on-load operation and additionally comply with
BS 5733, as home run disconnection is liable to create
unacceptable disruption to the system.
Installation couplers
Figure 11 - Marking to indicate that an on-load connection
method to; BS EN 61535 and BS 5733, provides a
convenient luminaire connection method