Talk:Appliance classes

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Class 0 going away?

This whole article seems to be nothing but a flight of fancy. The idea that most countries require all devices to be double-insulated or grounded is just patently ridiculous. "Most" countries have few electrical safety rules at all, and even in industrialized nations ungrounded plugs are common and rarely are double insulated except for high current draw devices. —Preceding unsigned comment added by 213.155.151.233 (talk) 20:49, 7 December 2009 (UTC)[reply]

Yes, it seems as if a Class 0 should be there, and the Class 1 says that the UK has banned the class from being in products, which is preposterous. It may be banned on some industrial equipment, not everyday appliances.24.246.112.51 (talk) 14:09, 29 February 2012 (UTC)[reply]

All Class 0 devices have been banned from sale in the UK since 1975. Do some research! Blitterbug 04:53, 5 February 2020 (UTC) — Preceding unsigned comment added by Blitterbug (talk • contribs)

Class II device insulation requirements

The article contains the following sentance describing Class II device insulation requirements:

"There are also strict requirements relating to the maximum insulation resistance and leakage to any functional earth or signal connections of such appliances."

I suspect this should read "minimum insulation resistance".

The author was probably thinking about minimising leakage current which corrsponds to maximising insulation resistance and requiring that insulation resistance be at least a certain value (i.e. a requirement on the minimum acceptable insulation resistance).

Section for Class I, II, and III as an electrical DESIGN and INTENT?

I would like to suggest an additional listing for Class I, II, and III devices with respect to their design intent. (Among other standards, these are described in the IPC-A-610, "Acceptability of Electronic Assemblies" standard, 1.4.1, "Classification".)

I am not familiar enough with Wiki to go forward with the definitions, required links, or what permissions must be sought, so I thought I'd pass this on to see if someone is interested in putting it in.

The class definitions for manufacturing, (paraphrased,) are as follows:

Class 1- Requires only that the assembly be functional.

Class 2- An assembly that operates, and is built for extended lifespan. Uninterrupted service is desired but not critically important.

Class 3- The assembly MUST perform when required. These are "high performance" electronic devices where downtime is not tolerated, they must perform as required on demand, their end use environment may be harsh, and their use is be considered critical. —Preceding unsigned comment added by 24.229.80.119 (talk) 18:26, 28 April 2008 (UTC)[reply]

No. Your suggestions have bugger all relevance to the subject matter of the article, and so should not be included. —Preceding unsigned comment added by 86.182.149.243 (talk) 23:06, 23 March 2010 (UTC)[reply]

References

The reference cannot be found! — Preceding unsigned comment added by 87.194.211.61 (talk) 10:10, 9 August 2012 (UTC)[reply]

Appliance Class or Protection Class?

I am wondering why this article is called Appliance Classes, AFAIK the standard term for these classes is Protection Class. Correct me if I am wrong. --Tuluqaruk (talk) 13:27, 17 November 2016 (UTC)[reply]

Are you thinking of IP Code? --Wtshymanski (talk) 18:27, 17 November 2016 (UTC)[reply]

No mention of Monitored Earth equipment?

Monitored Earth equipment is used in places like slaughter-houses (on equipment like beef saws), where the machine is constantly wet and an RCD would cause nuisance tripping, due to the earth leakage currents from the motor stator. Trumpy (talk) 06:51, 26 December 2016 (UTC)[reply]

Class 0 earth connections

The Class 0 section begins with

These appliances have no protective-earth connection [...]

and finishes with

These appliances must have their chassis connected to electrical earth.

In many plug types without a protective earth/ground the plugs can be flipped such that line or phase voltage and the neutral appear on either connection. If the reference to 'electrical earth' means neutral, then this is obviously dangerous & wrong as it could put line voltage on the chassis. If it is in reference to a protective earth/ground then it is in contradiction with the first sentence. It seems the last sentence should be removed or reworked. Velowiki (talk) 20:27, 14 February 2017 (UTC)[reply]