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Joined: Apr 2022
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Greetings all what are your local rules on earth leakage protection AKA ground fault protection now in 2024? I know some of the rules have been updated and 30ma Residual Current Devices (RCD) seem to be the norm. Are there ever lower requirements like 5ma, 10ma or 20ma? I have herd Australia and New Zealand use slightly different standards for them. Cheers
Last edited by tortuga; 08/12/24 12:47 AM.
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Joined: Jul 2004
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GFCI at 5ma is pretty much the standard here for personal safety. You get 30ma protection in an AFCI and we get them most places that don't require GFCI
Greg Fretwell
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Joined: Dec 2001
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30 mA for all domestic circuits up to 20 or 32 A in most parts of Europe, no requirements for more sensitive protection that I'm aware of but keep in mind that Europe is a continent with dozens of independent countries, almost each of which has its own electrical regulations. Most, if not all of those are based on the CENELEC harmonisation documents but with countless national additions and exceptions. In commercial and industrial installations usually 30 mA for socket circuits up to the limits I mentioned above, not required for hard-wired appliances and lighting circuits, unless classified as special locations (primarily high fire risk, e.g. woodworking, storage of flammable materials, etc.). 10 mA is readily available but nothing smaller.
The actual implementation depends on local customs and, to a degree, cost - one main RCD, multiple RCDs or individual RCBOs can be used.
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Joined: Jul 2004
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The US can be as "Unique" as Europe. We do live under common standards with the same basic hardware everywhere but when it comes to enforcement, there are over 3000 AHJs out there with the power to change the rule if they want. A trade might need a notebook with all the changes in the jurisdictions he works in. After Andrew (hurricane) Florida decided to stop the madness and ten years of bureaucracy brought is a unified building code code, the same in every jurisdiction. We use the ICC building code set and the NEC for electrical. They also tightened up licensing for trades and created the state inspector license. At least one state is trying to normalize this business.
Greg Fretwell
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Joined: Jun 2014
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Hi I am responsible for keeping a 100 yrs old school up and running, The panels was upgraded around 15 yrs ago, with CHINT 30mA combined GFCI/circuit breakers and when I got an unstable ground fault in a high power pump system up to 16 GFCI's was activated around in the building. I am not sure if other makes had done the same, but it was pretty frustrating. The old-fashioned power supply is a 3x 230V system pretty equal to the US 240 3 phase like this: https://i.sstatic.net/ZVZmz.png
Last edited by dsk; 12/25/24 12:40 AM. Reason: picture problems
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Joined: Jan 2025
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The maximum value of the leakage [url=http://insulationmat.in][/url]current shall not be more than 10 milliampere.
Last edited by greenplanet2050; 01/11/25 07:00 AM.
Insulation expert
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Joined: Dec 2005
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In New Zealand most leakage MCB's RCBO's are 30 mA and for hospitals it is usually 10 mA for leakage.
The product of rotation, excitation and flux produces electricty.
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Joined: Jun 2014
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Posts: 30
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