421.1.200 Switchgear assemblies including consumer units shall:
(i) have their enclosure manufactured from non-combustible or not readily combustible material, or
(ii) be enclosed in a cabinet or enclosure constructed of non-combustible or not readily combustible material.
NOTE 1: Ferrous metal e.g. steel is deemed to be an example of a non-combustible material
NOTE 2: For the purposes of this regulation insulating material e.g. plastic meeting a 960 ºC glow-wire flammability test as
defined in BS EN 60695-2-11 is considered to be an example of a not readily combustible material.
I wonder if current plastic CUs comply with note 2?
Unless otherwise specified in the relevant specification, the test specimen is considered to
have passed the glow-wire test if there is no flaming or glowing, or if all of the following
situations apply:
a) if flames or glowing of the test specimen extinguish within 30 s after removal of the glowwire; and
b) when the specified layer of wrapping tissue is used there shall be no ignition of the
wrapping tissue.
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