duplicate protective conductor question

[plebeian]

Is there a requirement stipulating a final circuit supplying only one socket outlet should incorporate a duplicate protective conductor?

 

[davesparks]

Is there a requirement stipulating a final circuit supplying only one socket outlet should incorporate a duplicate protective conductor?

Not solely for the reason that there is single outlet, but it may be required of the equipment the socket is intended for has an expected earth leakage greater than 10mA

 

[plebeian]

Not solely for the reason that there is single outlet, but it may be required of the equipment the socket is intended for has an expected earth leakage greater than 10mA

It's supplying a washing machine so unless it's faulty that would be fine?

 

[davesparks]

It's supplying a washing machine so unless it's faulty that would be fine?

yes that wouldn't normally need a duplicate cpc, what has made you ask this question?

 

[Lucien Nunes]

Would there ever be a need for a high-integrity CPC outside of a special location, for one double 13A? The maximum leakage current of an appliance connected via a BS1363 plug is 3.5mA, so 7mA total. It's possible that multiple high-leakage, low load appliances might be connected with multiway adaptors but in a domestic installation the probablility is negligible and not foreseeable in design. In a commercial or industrial one, it could be foreseen but an alternative socket outlet would then be specified e.g. CEE17 feeding a local PDU.

 

[plebeian]

There no problem with it, what prompted me to ask is that I was suspicious that it had been incorrectly installed.
If there were two sockets therefore radial circuit a duplicate protective conducter would be incorporated but I wasn't sure if that was the case for one socket.

 

[Lucien Nunes]

If there were two sockets therefore radial circuit a duplicate protective conducter would be incorporated

Not sure what you mean. A normal radial circuit has only one CPC no matter how many points it serves.

 

[plebeian]

Not sure what you mean. A normal radial circuit has only one CPC no matter how many points it serves.

Diagram attached to view

 

[Lucien Nunes]

That's not a normal radial circuit. The duplicate conductor would only be installed for a circuit with design functional earth leakage >10mA, typically in an industrial or commercial application with large quantities of IT equipment.

 

[DPG]

Out of interest, do you normally run a second cpc on your radial circuits then?

 

[MJPD29]

That's not a normal radial circuit you have pictured.