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Posted By Topic: standard to follow for vetinary patent areas

peter
Jan 22 2020 08:07

Is standard 3003 the one to follow for veterinary areas . Patients being cats and dogs . or is there another standard . Is 3003 mandated for veterinary clinics ?
   

AlecK
Jan 22 2020 08:59

"3003" is not intended for electrical work in veterinary areas; and certainly isn't mandated for it. There isn't an AS/NZS for that, nor anything in IEC 60364 series (electrical installations).

AS/NZS 60479 series provides info on the effects of current on humans & livestock; but despite the title it's presented as just humans. The effects depend on current, and the current depends on impedance.
Effectively we're all just bags of salt water with most of the impedance being in the bag (skin); but there will be many variables between species. Eg heart rates differ, so max duration of shock to avoid fibrillation may differ. So I'd be surprised if what's OK for horses would be equally OK for hamsters.

And I doubt the animal rights people would be happy if anyone tried to research this stuff. They don't even like experiments on animals that are intended to save humans - which is largely what "60479" is based on.

Auntie Google may find something relevant; but what comes in at top of list is all about the safety of the vet rather than the animals.


   

peter
Jan 22 2020 13:36

Thanks for your help , as always . So i need to decide for myself if 10 ma or 30 ma rccb. The 10 ma one appear to be more expensive , also worried about nussence tripping .
I am installing a number of theater type ceiling examination lamps and some dropper type hanging power points.
Thanks again for your reply .
   

AlecK
Jan 22 2020 15:10

RCDs for electro-medical, classified as Type I, are not just lower operating current; but faster action (40 ms). That, along with market forces, explains the price difference.

A compromise might be the 10 mA normal trip time (300 ms), such as we use in schools.

But best to talk to your customer, and see what they want.