Additional protection regulation

[Dru]

I'm unsure as to what this regulation means.

Regulation 411.3.3

Can anyone put it in terms I can understand please? Not all sockets 20a or under require additional protection by the means of an RCD so what does it mean?

All help is greatly appreciated

 

[telectrix]

according to 411.3.3. all sockets covered by (i) and (ii) require RCD protection with the exceptions given in (a) and (b).

 

[Andy78]

It means, apart from where a permitted exception is employed, every socket 20A or less shall be provided additional protection in the form of a RCD compliant with 415.1.

 

[Dru]

So a 16a radial with one socket requires an RCD?

 

[kingeri]

So a 16a radial with one socket requires an RCD?

Yes. Why wouldn't it?

 

[Andy78]

So a 16a radial with one socket requires an RCD?

Why does the rating of the OCPD have any relevance ? The regulation refers to the current rating of the socket outlet so don't apply it in other ways.
The socket most likely requires an RCD to protect it unless you are legitimately using a stated exception. Whether the circuit requires one is not clear from the information you have provided.

 

[davesparks]

Yes. Why wouldn't it?

The circuit doesn't, but the socket outlet will if it's rating is less than 20A

 

[jackhammerJIM]

Yes. Why wouldn't it?

have installed radial circuits with a socket outlet non rcd protected for specific items of equipment , surface mount and suitably labelled .

 

[Flanders]

So as long as you haven't barried the cable the wall less than 50mm , and its not a domestic inviroment then i would way say part b of this reg covers what you have done as compliant

 

[HandySparks]

So as long as you haven't barried the cable the wall less than 50mm , and its not a domestic inviroment then i would way say part b of this reg covers what you have done as compliant

Surely exception b applies irrespective of the use of the building?

 

[Flanders]

Surely exception b applies irrespective of the use of the building?

I did think that justvafter posting it i was under the impression that there was no exceptions for omitting an rcd in a domestic environment athough now i re read the reg it does not mention about it being a domestic environment so i stand corrected

 

[Richard Burns]

Additional protection by a <=30mA RCD that trips in less than 40ms at 5 x rated current is NOT required for:

Socket(s) in a non domestic location that are designed to operate at <=20A where it has been identified through a written risk assessment that such additional protection is not required as there is not a significant risk.
A socket in any location that is designed to operate at <=20A where the socket is dedicated to a specific piece of equipment and the socket is labelled as such.
A FELV or a reduced low voltage system and mobile equipment for use in an outside location rated greater than 32A .


ALL other sockets that are designed to operate at <=20A DO require additional protection by a <=30mA RCD that trips in less than 40ms at 5 x rated current.

 

[Deleted member 26818]

One point I would like to make:
A documented RA which does not conclude that RCD protection is not required, would not be acceptable for ommiting RCD protection.

 

[DPG]

One point I would like to make:
A documented RA which does not conclude that RCD protection is not required, would not be acceptable for ommiting RCD protection.

That's a lot of 'nots' ! Daz