8.5.3 - Tests of barriers and enclosures
Throughout the Regulations reference is
made to the use of barriers and enclosures to prevent contact
with live parts (direct contact). If manufactured equipment's
comply with the British Standards concerned, they will not
need further testing, but where barriers and enclosures
have been provided during erection of the installation,
they must be tested. Full details of the IP classification
system will be found in {Table
2.1}, but the two most common tests are for:
1. - IP2X - no contact can be made
with a probe 12 mm in diameter and 80 mm long
- in
other words, a human finger
2. - IP4X - no contact can be made
with a rod of diameter 1 mm.
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