Manual operating means within assem

Manual operating means within assemblies which are only accessible after the assembly has been opened, for example draw-out handles which are operated infrequently, are allowed to assume a 25K increase on these temperature-rise limits.Unless otherwise specified, in the case of covers and enclosures, which are accessible but need not be touched during normal operation, a 10k increase on these tempertaure-rise limits is permissible. External surface amd parts over 2m from the base of the asssembly are considered inaccessible.This allows a degree of flexibility in respect of equipment (e.g. electronic devices) which is subject to temperature0rise limits different from those normally associated with switchgear and controlgear,For temperature-rise tests according to 10.10, the temperature-rise limits have to be specified by the original manufacturer taking into account any additional measuring points and limits imposed by the component manufacturer.