1 May
2012
1 May
'12
3:27 p.m.
s?n 2012-04-29 klockan 20:47 +0100 skrev Tony Duell:
For the RCD to be classified as a person protective device it is 30 mA
which is a current deemed to not be dangerous towards the heart.
An 300 mA RCD is classified as an 'fire protection device' but not
person protective so for example an heating pump would be connected by
itself via one such device.
The fridge in the kitchen would require an 30 mA personal protection
device.
RCDs is a bit uneffective because it is entirely possible to get
currents thru you body which the RCD won't know to cut. It exist an
certain risk that the current will pass from the phase thru your body
and back to the RCD thru the neutral connector.
battery or pneumaticly driven hand-tools is safer because of this.
What is a
"consumer unit", Rob?
OK, I'm not Rob, but I use the term...
It;s what's commonly called a fusebox (or breaker box). The incoming
mains cable to a house (or simuilar) in the UK goes throguh a sealed
electriciy company fuse, then the watthour meterand then to the 'comsumer
unit;' which the first part owned by the consumer. It consists of a
double-pole main switch and various protectvie devicees (fuses, circuit
breakers, RCDs [1]) wiich then feed the various power circuits and
lighting cirucits of the house.
[1] Residual Current Device. I am not sure if that trem crosses the Pond,
it's a device that detects an imbalance of current in the live and
neutral wires, indicating a leak to earth somewhere, agd turns off the
supply if that imbalance is greater than a certain (small, perahps 30mA)
value.