Oh sorry guys.. it is supposed to be inspected to NEC 2005 US standards...
If this is a USA owned or managed facility, that was specified to be wired according to the NEC, then inspection to ensure that it does actualy comply, is a simple matter for anyone experienced in such work.
It is however possible that the installation is wired/intended to be wired according to UK IET regulations.
We are currently useing the 17th edition of the regulations, though if the installation is a few years old it may have been intended to comply with the previous 16th edition.
If the installation is wired correctly to UK standards then it should be safe to use, but wont comply with the NEC. Some of the violations that you will find include
230/240 volt lighting in residential
Ring circuits whereby outlets are wired in a ring of 2.5 mm cable, with both ends connected to the same 32 amp breaker. This violates the NEC prohibition on small conductors in parralell.
Branch circuits in 2.5mm cable (similar to #14) on 20 or even 25 amp breakers, considered safe here but a clear violation of the NEC which in general requires #12 for 20 amps
Likewise 4.0mm cable on 32 amp breakers, would be limited to 20 amps in general under the NEC
Lighting circuits wired in 1.0 or 1.5 mm cable, a violation of the NEC which generaly requires nothing smaller than #14. Safe though if on the correct fuse or breaker, 6 or 10 amps.
Regretably though, the installation may be wired in a horrible mixture of UK and USA materials and practices, and not compliant with any codes or standards.
Common hazards include NEMA 5-15 outlets used on 240 volts, USA 120/240 volt panalboards used on 240/415 volts, and single pole breakers used for 220 volt branch circuits derived form a 127/220 volt system.
Colour codes may be a mixture of UK colours, old or new?, probably some of each , and USA colours, and whatever seemed a good idea to the installer/what they had on the donkey.
Three phase, 4 wire circuits are often wired in steel wire armoured cable with the following colour code
Neutral=blue L1=black L2=red L3=yellow
That is not in accordance with either the old or new UK colours but is a local tradition! Probably done by European electricians confronted with cable in old UK colours.
Sometimes the same cable is used with yellow as the neutral, and black, red and blue as phases. Probably done by an American electrician confronted with cable in the old UK colours.
This also does not meet either the old or new standards in the UK, but is similar to USA colours, white tape MIGHT be applied to the yellow.