What should be checked at each power point?
You should check the power point for mechanical compliance, then test the polarity, the switch, and the earth continuity.
Does every power point and switch need to be checked for mechanical compliance, polarity and earth continuity?
All electrical fittings and fixtures need to be checked, to the extent practical.
When would it not be practical to test a power point or appliance?
Examples of situations where it would not be practical could include where a power point was inaccessible due to being behind a heavy object that can’t be moved by one person, or where there was a light fitting that required a very high ladder to access e.g. >2.4m.