IKEA Strala Manual De Instrucciones página 8

The following are examples of items that should be
checked before plugging in the set to the mains. The
flexible cable and lampholders: is the cable in good
condition? is it free from cuts, fraying and
damage? are the connections at each
lampholder sound? are the lampholders free from cracks
or damage, that might give access to the live cable or
live contacts of the lamps?
The lamps:
are they all in place, undamaged, properly screwed or
pushed in?
The plug/transformer
Check that the plug is not damaged.
Look for signs of overheating.
Check the fuse (if any), make sure it is the correct rating.
IF ANY DOUBT, HAVE THE SET CHECKED BY A QUALIFIED
ELECTRICIAN BEFORE USE OR SCRAP AND PURCHASE A
NEW SET.
Where the set is intended to be connected to the supply
via a 'plug-in transformer', only use the transformer
supplied with the set. Otherwise if the output voltage
does not match the voltage of the lamps overheating
may result.
Functional Tests
After the visual inspection and correcting any faults
found, including tightening of lamps and replacement
of broken or missing lamps, plug in and switch on the
lamp set.