Discuss MEM RCD Tripping Times in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

L

Ladders

Hi.

Should the x1 and x5 RCD tripping time test results for the MEM AM1004M RCD 100A 100mA still be as usual? 0.4s etc...
Also if doing a ramp test that should trip in?

Finally, as I think the one I tested is faulty, any ideas where I could get another from?

Thanks.
 
BS 61008/BS 61009 = 200mS @ 1x - 40mS @ 5x
BS EN 61008/BS EN 61009 = 300mS @ 1x - 40mS @ 5x
 
Hi.

Should the x1 and x5 RCD tripping time test results for the MEM AM1004M RCD 100A 100mA still be as usual? 0.4s etc...
Also if doing a ramp test that should trip in?

Finally, as I think the one I tested is faulty, any ideas where I could get another from?

Thanks.
40ms = 0.04s.
It's very unlikely that you will be able to test a 100mA RCD with a standard tester.
Most testers will not produce the required 500mA test current.
 
So to test a 100mA RCD my Megger 1552 does not cut the mustard. I had a feeling it might be something like that! Doh! The only time I could get it to trip was the x5 test but it took way to long. For the x1 greater than 400 and it would not ramp at all.
 
The times 5 test is not required for RCD's above 30mA The x5 test is only required if a 30mA or less RCD is used for protecting persons.
 
what is the reason you are using a RCD ?
you need to check the Regs or OSG, you should not be taking a 30mA out and replacing with a 100mA without checking full compliance
Off the top of my head requirements are
Sockets 30mA or less
Additional Protection 30mA or less
Bathroom circuits 30mA or less
Concealed cables 30mA or less

100ma plus RCD's are typically used for TT installations when the Zs is too high to achieve disconnection time of 0.2 secs or where additional fire protection is required
Any of the above conditions listed plus a few more I can't remember 30mA or less is required.

PS don't have my Regs to hand so can't remember all requirements
 

Reply to MEM RCD Tripping Times in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock