Unused SWA

[Jako13!]

What is the regs on terminating unused cable or even cores of an SWA cable. I know sometimes we can’t remove the cable completely sometimes due to being impractical.

 

[Andy78]

Unused cores or cables should be connected to earth if they still form part of an electrical installation but are unused.

 

[davesparks]

Unused cores in a cable which has live conductors in it, or unused singles in trunking/conduit which has live conductors in it, should ideally always be connected to earth. This will prevent capacitively coupled (phantom/ghost voltages) or induced voltages appearing on the conductors.

 

[Jako13!]

Unused cores in a cable which has live conductors in it, or unused singles in trunking/conduit which has live conductors in it, should ideally always be connected to earth. This will prevent capacitively coupled (phantom/ghost voltages) or induced voltages appearing on the conductors.

Unused cable all together?
[automerge]1591968359[/automerge]

Unused cable all together? So you would ideally Earth all the cores to earth?

 

[Strima]

Unused cable all together?

Yes and tied to earth. Also worth labelling up as unused.

 

[David Prosser]

I'm not aware of any regulation that requires unused cores to be connected to earth.

Most control panels will have multi core cables coming in/going out where not all cores will be used, they are not connected to earth but labelled and terminiated correctly into din rail terminal blocks.

 

[davesparks]

I'm not aware of any regulation that requires unused cores to be connected to earth.

There is no regulation specifically in BS7671. But it is common sense and best practice to make the unused cores safe, generally being connected to earth achieves this and eliminates any phantom voltage.

 

[Andy78]

I'm not aware of any regulation that requires unused cores to be connected to earth.

Does EAWR regulation 8 cover it ?

Precautions shall be taken, either by earthing or by other suitable means, to prevent danger arising when any conductor (other than a circuit conductor) which may reasonably foreseeably become charged as a result of either the use of a system, or a fault in a system, becomes so charged; and, for the purposes of ensuring compliance with this regulation, a conductor shall be regarded as earthed when it is connected to the general mass of earth by conductors of sufficient strength and current-carrying capability to discharge electrical energy to earth.

 

[David Prosser]

Many cores are left connected to din rails in control panels. I guess it would cover the other suitable means of preventing danger arising.

 

[Jako13!]

Many cores are left connected to din rails in control panels. I guess it would cover the other suitable means of preventing danger arising.

Connect in terminals or connected to earth?