| Definition: | surface that is intentionally heated by an internal heat source and that has to be hot to carry out the function for which the equipment is intended to be used
EXAMPLE Curling tongs, the soleplate of an iron and the heater of a copy machine each has a hot functional surface.
Note 1 to entry: Some equipment has hot surfaces as a consequence of how they generate their output, (for example, lamps within a luminaire or the heater of a copy machine), and these surfaces are considered, in terms of their treatment, as equivalent to a hot functional surface.
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