My electricity meter has less than four cables coming from it?

Generally, a domestic electricity meter will have 4 or 5 cables connected to it. However, some installations will use a special connection block between the incoming cable and the meter. In this case, only 2 cables will be visible.

In this instance, you should attach your Loop Clip around the Live cable.  If this is not marked, clip on RIGHT HAND CABLE. 

There is more information on installation on this page.