By putting the RCD in the extension lead, protection is provided at whatever outlet is used even if the building has old wiring, such as knob and tube, or wiring that does not contain a grounding conductor.
12.
The set-top box is on a fairly short lead at the moment, but I'll put it on an extension lead and get it away from the TV and see what happens .-- [ your turn ] 23 : 32, 18 March 2011 ( UTC)
13.
Electrical plugs with incorporated RCD are sometimes installed on appliances that might be considered to pose a particular safety hazard, for example long extension leads, which might be used outdoors, or garden equipment or hair dryers, which may be used near a bath or sink.
14.
Listening to stories about tragic financial reversals, divorces and lost jobs may not be the most fun-filled way to begin a career, but it's the best way to learn about the costs to the company and its customers when credit line extensions lead to disappointing outcomes.