Inspection which encompasses those aspects covered by a visual inspection and, in addition, identifies those defects, such as loose bolts, which will be apparent only by the use of access equipment
EXAMPLE Steps, (where necessary), and tools.
Note 1 to entry: Close inspections do not normally require the enclosure to be opened, or the equipment to be deenergized.
Source: IEC 60079-17:2013, Explosive atmospheres – Part 17: Electrical installations inspection and maintenance, Edition 5.0, November 2013. Global Standards