swa

[sijaysee]

just looked at a job where the swa comes into the
house in a ip66 plastic box. no gland. steel armour has just been
cut off.

it is 3 core though so my question is:

does the steel core need to be terminated or is
it ok just to have one of the 3 cores as the earth?

 

[pop123]

just looked at a job where the swa comes into the
house in a ip66 plastic box. no gland. steel armour has just been
cut off.

it is 3 core though so my question is:

does the steel core need to be terminated or is
it ok just to have one of the 3 cores as the earth?

Yes the steel wire armouring should be terminated through a gland at one or both ends depending on the the earthing arrangements.

What is the job you are looking at?

 

[sijaysee]

its a new kitchen. the swa comes into a cupboard and then
into a box, and joined to 2.5mm T&E with a jiffy block.

best part is that they have then stucka 13amp plug onto
the end the T&E and plugged it into a RCD socket

Why would you only terminate one end?

the other end just snipped off like has been done?

 

[pop123]

its a new kitchen. the swa comes into a cupboard and then
into a box, and joined to 2.5mm T&E with a jiffy block.

best part is that they have then stucka 13amp plug onto
the end the T&E and plugged it into a RCD socket

Why would you only terminate one end?

the other end just snipped off like has been done?

A 'jiffy block' or jiffy bag?


Where is the supply to the swa coming from ? Describe the means of protection and earthing arrangements

 

[sijaysee]

tncs supply. like i said, there is a 30ma rcd on the ring
which the swa is plugged into via a plastic box and some 2.5mm T&E.

 

[333rocky333]

I take it you mean an outgoing circuit rather than the SUPPLY to the house

My view is
The armour will be earthed via the core used as earth and coming back, via the gland at other end , if that end was metal
.
The gland into the plastic box would have done nothing electically though unless the banjo and an earth lead was fitted which should have been done and connected also to the T+E earth.

What they have done is bad practice though as if in future a plastic box was fitted at the load end you would have no earth to the armour.

The gland should still be put in any box however as it also mechanically supports and stops cable pulling out

Just noticed the bit about the plug, so I would condemn the lot and start again

 

[sijaysee]

well i am going to discard the plug into the rcd
and replace with a fused spur arrangement.

i could fit glands to help with support etc but the steel doesnt
have to be connected to earth via a fly lead

 

[securespark]

Here is a copy of part of a reg I posted elsewhere tonight.

]]522-06-03:

Except where installed in conduit or duct, which provides equivalent protection against mechanical damage, a cable buried in the ground shall incorporate an earthed armour or metal sheath or both., suitable for use as a protective conductor, or be of insulated concentric construction.......