63 amp socket Table 41.1

[Cookie]

Does anyone know why 0.4 seconds was extended to 63 amp socket circuits? Is this because supply sources are getting stronger?

 

[Julie.]

Alright.

So double checking that would mean a hard wired cooker could get away with 5 seconds, but a flex cooker would require 0.4 seconds? In the US almost all cookers have plugs on them.

Sort of, the cooker example is unlikely to fall within this range (unless industrial, or especially large), but yes there could be loads which are final circuits between 32A and 64A where being hard-wired or plugged in would make such a difference.

In the uk a plug may be used up to 13A on a cooker, above this it is almost always wired in except in a few occasions such as temporary catering where industrial type plugs will be used.

The biggest area to be impacted is industrial as they are likely to have portable/mobile loads that fall in this range.

Essentially as newer versions of the standard are developed the limit of 0.4s and the use of rcds is getting applied to more and more.

I think the whole idea is that eventually all final circuits supplied by a socket outlet should have rcd and 0.4s.

Remember this clause is aimed at final circuits only.

Distribution circuits do not fall under this clause - reflecting the need for discrimination, and the likelihood that when used for distribution it would be controlled by knowledgeable persons.

 

[Cookie]

My understanding is that in India, all final circuits are required to disconnect in 0.4 seconds or less. Personally I like the idea.

An exception for 5 seconds is needed for sub circuits though- 60 amp life safety feeder must selectively coordinate with the final OCPDs.

 

[Rockingit]

My understanding is that in India, all final circuits are required to disconnect in 0.4 seconds or less. Personally I like the idea.

An exception for 5 seconds is needed for sub circuits though- 60 amp life safety feeder must selectively coordinate with the final OCPDs.

India. An interesting place to work with electrics (as I have)...... least said about their 'standards' the better, I feel.

 

[pc1966]

India. An interesting place to work with electrics (as I have)...... least said about their 'standards' the better, I feel.

Not so much the standards, but any sort of compliance to them!

 

[Cookie]

India. An interesting place to work with electrics (as I have)...... least said about their 'standards' the better, I feel.

India has one of the most beautiful electrical systems on earth, minus all the DIY of course.

 

[pc1966]

To be fair I have worked with some really talented Indian engineers, but they are not the ones being paid peanuts by outsourcing companies or filling in for a boss who won't get a professional in to do the job properly.

 

[Rockingit]

India has one of the most beautiful electrical systems on earth, minus all the DIY of course.

I get the impression we may have differing experiences on this one. It was in India (Mumbai, to be exact [though other places and experiences also exist]) that in a 5* hotel I enquired why the earthing had been removed.... “because if we put it back on all the trips go”.

 

[Cookie]

I get the impression we may have differing experiences on this one. It was in India (Mumbai, to be exact [though other places and experiences also exist]) that in a 5* hotel I enquired why the earthing had been removed.... “because if we put it back on all the trips go”.

Sadly, not everyone follows the regs, standards or understands what they are doing.