Can we use the armour of an SWA as the CPC???

[Deleted member 26818]

What if the plug is in the loft?

 

[Amp David]

Just throwing this in because i'm sick of reading these threads about very basic electrical practise. If you have to ask questions like this then you shouldn't be touching any electrical installation above a 13amp plug!!!

Nugget!

 

[TAFF4]

Just throwing this in because i'm sick of reading these threads about very basic electrical practise. If you have to ask questions like this then you shouldn't be touching any electrical installation above a 13amp plug!!!

I look forward to your future input with interest.

Try your spell checker on the more taxing issues.

 

[madmac]

@Amp David: Thanks for that eloquent input into the discussion. After all, who knows? maybe i am a "nugget", or maybe i'm just some daft spark that's looking after his and his fellow electricians jobs! Now for the reality check........If guys on here think they are doing some sort of noble gesture by educating the ill-informed fast track sparks out there by giving away our trade secrets and experience, then don't complain when the next job you've priced for at competitive rates is blown out of the water by a fast tracked fake spark, undercutting everyone and saying a big thanks for this oppertunity!!! Just think about it for a second and you'll see who the real nuggets are and pray that you'll always have a secure and non threatened workplace. Oh and TAFF4, i don't need to be great at spelling on a site like this as it's not dangerous......unlike some of the question and answers i've had the misfortune to gaze on here!!!

 

[IQ Electrical]

@Amp David: Thanks for that eloquent input into the discussion. After all, who knows? maybe i am a "nugget", or maybe i'm just some daft spark that's looking after his and his fellow electricians jobs! Now for the reality check........If guys on here think they are doing some sort of noble gesture by educating the ill-informed fast track sparks out there by giving away our trade secrets and experience, then don't complain when the next job you've priced for at competitive rates is blown out of the water by a fast tracked fake spark, undercutting everyone and saying a big thanks for this oppertunity!!! Just think about it for a second and you'll see who the real nuggets are and pray that you'll always have a secure and non threatened workplace. Oh and TAFF4, i don't need to be great at spelling on a site like this as it's not dangerous......unlike some of the question and answers i've had the misfortune to gaze on here!!!

madmac, I think you're missing the spirit of the forum, who are we to 'restrict' certain items of information?

The sizing of SWA for use as a CPC certainly doesn't slot into the 'trade secret' category, it's been the subject of many reports and studies by the IET and ECA!

Then the adiabatic equation, how many blank looks I get when I mention the adiabatic to 'time served' approved electricians, not because they are 'fast tracked fake sparks' but because they never have occasion to use it on a regular basis!

Of course we can all lose contracts to lesser qualified electricians but restricting forum information won't have a drastic effect on that....

 

[Chr!s]

Is the swa a ferromagnetic enclosure?, aren't the spacings in the armour sufficient to break down circulating currents.

 

[Deleted member 26818]

Yes the SWA is a ferromagnetic enclosure. However there is apparently going to be an exception to the requirement for CPCs to be within the ferromagnetic enclosure for SWA in the first ammendment.

 

[Chr!s]

Yes the SWA is a ferromagnetic enclosure. However there is apparently going to be an exception to the requirement for CPCs to be within the ferromagnetic enclosure for SWA in the first ammendment.

So i believe, think its due to test showing armoring spacing breaking down circulating currents

 

[Deleted member 26818]

There is a report about from the ERA, produced for the ECA, I believe it's entitled 'ECA appendix 16' or similar.
This has information on the use of a separate CPC with SWA.

 

[xXDeltaXx]

Just a little addition in relation to a previous point...
People coming from a 'fast track' scheme may not have covered this in enough detail to know for certain if the SWA armour is suitable for an installation - I know that I am / was unsure - This thread has helped me

I'm not quite sure on the point about loosing business to someone fresh (inexperienced) into the industry...
I will just state that the reason I'm here and looking for this info is because my company (not electrical) has an old boiler installation (late 80s) which I believe to be unsafe / questionable methods have been used on installations / modifications. The company has had electicians into and around the area before and no-one has commented on the installation - thus it will remain unchecked until it goes wrong. By carrying out calculations and checks, I hope to be able to get things rectified...
This kind of topic may end up generating jobs for the more experienced electrician rather than taking them away.

 

[andyemms]

Well I have found all this a very interesting read... I for one would choose to use both the armouring and an extra core as a CPC.

I'm not quite sure on the point about loosing business to someone fresh (inexperienced) into the industry...
I will just state that the reason I'm here and looking for this info is because my company (not electrical) has an old boiler installation (late 80s) which I believe to be unsafe / questionable methods have been used on installations / modifications. The company has had electicians into and around the area before and no-one has commented on the installation - thus it will remain unchecked until it goes wrong. By carrying out calculations and checks, I hope to be able to get things rectified...
This kind of topic may end up generating jobs for the more experienced electrician rather than taking them away.

I think it is important to remember that this forum attracts people from everyday walks of life. There are some very knowledgeable and experienced people on here, there are some very knowledgeable but inexperienced people on here and there are people that have very little knowledge or experience. But we are all here for a reason, either to share our knowledge, or to gain knowledge.

YEEE HAAAAAA!

 

[Dave_]

Nice to see this thread is still going!

I always run a run a seperate cpc (boss says so!) although its very easy to prove its not a necessity (adiabatic). good practice. He has 30 years more experience than me. I just do as i am told.............................

 

[biguner]

Doesnt it depend on the csa and length of run as to whether or not it needs additional cpc?

 

[IQ Electrical]

Doesnt it depend on the csa and length of run as to whether or not it needs additional cpc?

Your answer is in post 1

 

[tom1400l]

yes, its supposed to be earthed (c.p.c) anyway, try and get terminate it so that you can get the lowest resistance you can get