Electronics > Beginners
My first scope is arriving but my home (old) doesn't have mains grounding
<< < (10/10)
Zero999:
Yes, an RCD is a good idea.

If it's not possible to fix the wiring in the building, then your best bet is to use an RCD and connect all metal objects (metal water, heating pipes etc.) and conductors which are supposed to be earthed together with equipotential bonding to ensure it all stays at the same voltage.
Mechatrommer:
the my GFCI only 2 input 2 output. live and neutral input, live and neutral output (single phase). ground and neutral tied somewhere inside switch box, that is another story from GFCI.
edit: ok you made me work. the neutral line is not connected to my ground, i was talking out of an arse just now. but neutral to ground is only 1.7Vrms ;D
Electro Detective:

It won't matter to OP Fergo who is right, wrong, or somewhere in between,  :-//
if he/she gets zapped, takes out equipment, any suggested wiring hacks affect other building dwellers,
or all three scenarios, making for REAL news on the idiot box (TV) 

There is no guaranteed 'protection magic' buying and installing an RCD/GFCI, unless tested under real world conditions,
and tested regularly. I've replaced and tested/pre-tested enough of them to have a bit of a clue..  \$\Omega\$

They can fault out in too many ways and display no symptoms of failure or pending failure,
unless tested accordingly to verify that the trip current and trip times are up to spec and repeatable,
and notes taken including ambient temperature. 
Every six months or 12 months is a good bet, and if the RCD/GFCI is suss, then swap it out with a pre-tested QUALITY unit made by ThreeHungLow, rebadged for some former decent manufacturer.      

AFAIK the main marketing idea is that if the 'victim to be' touches something metallic that's connected to the earth/ground bonded neutral, and the active/live wire together,  :o
the RCD will protest  >:( :rant:  and no longer supply electricity,

saving the already battling household an unwanted funeral bill,
and the hassle of flogging the NLR hobby gear on Ebay to get some money back to eat.


FWIW RCD/GFCI can work nicely on the output of an isolation transformer, and not affect electrical codes, insurance policies etc

..if done correctly, according to where you are, be it 120v, 240v and what the earthing arrangement is 

If not done correctly, RCD will either not work or get cooked internally on the first TEST button flick, and never work again    :horse:



pcmad:
does your flat on the out side have access to a lighing conductor if so that goes to ground  or are your water pipes metal they should also be grounded
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod