Such equipment includes amongst others, vacuum cleaners, toasters, washing machines, refrigerators. hoists cranes where the cable length does not normally exceed Longer cable lengths are
permissible for xed inter-connections. This context ned “the intended environment”.
High stress Heavy duty
–High stress then present when the risk mechanical damage mechanical stress medium severity
appreciable, e.
Normal stress Ordinary duty
–Normal stress present when the cables are subject low mechanical stresses the areas application, and the
risk mechanical damage low, the case expected the normal use small medium size equipment
in domestic and commercial well light industrial premises. the basis
of mechanical uences, well the general expressions used, the term “stress” “duty” divided into the following
categories.
Included such equipment are radios, oor lamps, hairdryers, small desktop equipment.
DEFINITIONS: CLASSES STRESS (DUTY) FLEXIBLE
CABLES AND INSULATED WIRES
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The application exible cable certain areas as, in, operating materials well for certain combi-nations of
external uences that can occur these areas, described the collective term “stress” “duty”.
Low stress Light duty
–Low stress then present when the risk mechanical damage and mechanical stress low the areas of
application, the case expected for normal use lightweight hand-held devices and lightweight operating
materials domestic households.
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–Very low stress then present when the risk mechanical damage and mechanical stress very low and can be
considered negligible, i.
Outdoor use for limited period
–The cables may used outdoors “the intended environment” for short periods time, e.
Application: Indoor and outdoor use
The terms are conjunction with the limiting conditions, such for example, minimum and maximum operating
temperatures, the uence the ambient temperatures, understood being limited the design and intended
usage.
Indoor use
–The cables are installed connected apparatus device and can used permanently the building all times,
namely “the intended environment”.g. The building can used for commercial, industrial residential purposes.e. Included such types appliances are electric clocks and electric shavers.
Permanent outdoor use
–The cables are designed resist the various stresses that can occur outdoors “the intended environment”
(including weather conditions).g. connected electric
lawnmowers drills. The cables can used inside outside buildings for ambient
temperatures ranging from between –25°C and +50°C and the stabilised conductor temperatures not exceed
+60°C Examples are for connecting control unit production machine, connections between control unit and
a machine, e. Suitable exible
cables and insulated wires are ned the applicable equipment standards for the devices question. for normal use equipment moderately heavy branches industry agri-cultural workshops,
and the temporary use such building sites.
Included such equipment are, amongst others, moderately heavy portable machinery and motors building site
or agricultural workings, large hot-water boiling installations, hand-held lamps, hoists, and xed installations in
temporary buildings.
High stress (Heavy duty) multi-core cables
–Applications for high stress, though primarily for use areas manufacturing facilities including tool-making
machinery, mechanical handling equipment. under those uences that are expected for lightweight appliances households
and ces Cases applications where the cables having greater mechanical protection would restrict the
freedom movement the appliance.g
