The internal circle is 14mm diameter, with the outer being 23mm. the depth is 6mm made up of 3 x 2mm sections and the outer diameter of the middle section is 20mm.
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Answered by: Dcoz
Date published: 2017-03-06
do these grommets enable amendment 3 17th edition consumer units to be fully compliant (are thyr fire resistant)
Amendment 3 requires that grommets should be fitted to the new metal consumer units and to be fully compliant these should be fire proof