1. AS/NZ 3000:2007
1.4.34 Contact Direct
Contact with a conductor or conductive live part
that is live in normal service
1.4.35 Contact indirect
Contact with a conductive part that is not
normally live but has become live under fault
conditions (because of insulation failure or some
other cause.

2. AS/NZ 3000:2007
1.4.80 Residual Current Device RCD
A device intended to isolate supply to
protected circuits, socket outlets or electrical
equipment in the event of a current flow to
earth that exceeds a predetermined value