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sollysta Wiring Accessories Guide
11
“ A device used for isolation needs to
prevent inadvertent reclosure ”.
Fused connection units
A 13A fused connection unit could be used for many
applications. One of which could be to supply an electric
towel rail in a bathroom. This equipment may need to be
isolated for inspection, testing or maintenance.
Such a unit if used for isolation needs to be designed or
installed so as to prevent unintentional or inadvertent closure
as described in 537.2.2.3. Therefore if the fused connection
is not under the immediate supervision of the person
working on the towel rail then the whole circuit may have to
be isolated at the distribution board.
Alternatively the fused connection unit may have a
feature whereby it can be locked with the fuse carrier out and
thereby satisfying the regulations as far as securing the
isolation is concerned. BS 7671 table 53.2 identifies
BS 1363-4 as a device suitable for isolation