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#143889 03/11/06 09:19 AM
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In NZ and Australia the wiring regs exempt cookers and ranges from requiring RCD protection, and I have always assumed that the reasoning for this is that cooker elements have a naturally high earth leakage current

No it's because fixed appliances aren't regarded as being as likely to cause an electric shock as much as portable appliances.

#143890 03/11/06 09:21 AM
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Hence also the disconnect time rules of 0.4 sec. for outlets feeding portable appliances and 5 seconds for fixed appliances.

#143891 03/11/06 09:27 AM
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I thought an Rcd was only to be classed as a supplementary form of protection against indirect contact!

That's not what our wiring rules tells us. There are certain ways you are not allowed to run cables UNLESS the circuit is protected by an RCD. It is a brilliant device but it concerns me that decision makers tend to look upon RCDs as an alternative to safe methods.

#143892 03/12/06 11:01 AM
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It is a brilliant device but it concerns me that decision makers tend to look upon RCDs as an alternative to safe methods.

The problem is that so many memebers of the general public also seem to believe that the RCD is some sort of magic device that protects against all known shock hazards, wards off evil electrical spirits, etc. The advertising blurb has done a lot to foster that belief, and there really are those who believe that with an RCD they are totally immune to getting a shock.

Just try getting yourself across phase and neutral and wait for that RCD to protect you. [Linked Image]

#143893 03/12/06 11:10 AM
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Exactly Paul,
You and I have had discussions about these devices.
Are'nt they just the darlings of the PC crew.
"Prevent ALL electric shock".
My A***.
Like most things, they haven't yet been idiot-proofed.

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