Instaling Outdoors Floodlight with ground wiring.
 

Not so sure if this topic has been covered before (probably some
variation on it though), but I'm wondering about installing a new
Floodlight with sensor above the garage door and the implications of
providing proper ground wiring to the floodlight chassis.

The closest existing power point for the floodlight switch is next to
garage door, and I intend to draw power for the floodlight from this
point with only 3 - 4 metres of electrical wiring running up and to the
side of the brick wall. However the existing power light switch has
only neutral and active wires, without ground - not unusual for
lighting with plastic fixtures. However, the floodlight installation
instructions recommends grounding of the metal chassis. So what is the
usual and simple way of providing extension of ground wiring to a point
that has no existing ground wiring ? There is a power socket another 2
metres away that has proper ground wiring. Should I use this to provide
the extra ground wiring for the external floodlight ? If this were the
case then my concern is how to make extension of ground wiring discrete
and unexposed to tampering etc. Or is there a more simpler way ?

Thanks in advance for any hints or tips etc.,

Mike