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4
The installation shall comply with the dimensions in Figures 1 and 2, bearing in
mind that:
■ A minimum clearance of 30 mm has to be kept between the bottom of
the cooking hob and the top of an appliance or a thermal barrier (see next
page).
■ Overhead clearances - In no case shall the clearance between the highest
part of the hob and a range hood be less than 600 mm.
Any other downward facing combustible surface less than 600 mm above
the highest part of the hob shall be protected for the full width and depth
of the cooking surface area. However, in no case shall this clearance to any
surface be less than 450 mm.
■ Side clearances - Where the dimension from the periphery of the nearest
burner to any vertical combustible surface is less than 200 mm, the surface
shall be protected to a height of not less than 150 mm above the hob for
the full dimension (width or depth) of the cooking surface area.
■ Protection of combustible surfaces - The required protection shall ensure
that the surface temperature of the combustible surface does not exceed
50 °C above ambient. The fixing of 5 mm thick ceramic tiles to the surface
or attaching fire resistant material to the surface and covering with sheet
metal with minimum thickness of 0.4 mm would satisfy this requirement.
Caution:
The underside surface of the cooking hob can reach a temperature
exceeding 95 °C during normal use.
If after installation the underside surface is accessible through under-
bench cupboard doors and the like, it is essential that a rigid barrier is
installed so that such access is restricted. In order to avoid a hazard the
barrier must be of low thermal conductivity material installed according to
the instructions for installation.
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