RCBO 's

[RF Lighting]

I thought anything outside the house that is electrical ie cable should be protected by a rccd , what if the garage supply cable whic is a 6.00mm twin & earth protected by plastic conduit was damaged and it was'nt protected by a rcc back at the house.

According to the 16th edition, the only thing which requires RCD protection is a socket likely to supply portable equipment for use outside the equipotential zone.

Things like SWA supplying a submain do not require RCD protection. This remains unchanged in the 17th edition.

SWA is protected from mechanical damage by its construction. It has a tough steel layer encasing all the live conductors. This steel layer is earthed, so if something does manage to penetrate the steel layer, it will be automatically be earthed from being in contact with the armour, causing any live conductor which it may also touch to be short circuited to earth.

This causes a high current fault, which will automatically disconnect the supply, thus removing any danger.

 

[holmslaw]

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[RF Lighting]

And rcbo's are a type of rcd - thought everyone knew that.

I never knew they where the same thing - silly me - I wonder why they have different names.
So following your logic a fuse is an mcb, and any reg about mcb's can be applied to a fuse, and vice versa.

Make your mind up FFS

It's funny how with every post on this forum you make yourself look that little bit more stupid.

 

[sparkyspike]

An RCD is a general term. Unlike RCBO, RCCB, MCCB.

 

[GaryMo]

And rcbo's are a type of rcd - thought everyone knew that.

Did I just see a flying pig?

 

[holmslaw]

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[GaryMo]

I was only pulling your leg, I certainly don't carry grudges on forums!

Anyway, do you know why we have SP and DP RCD's?
If so, would you be so kind and explain the reasoning apart from the obvious that a DP RCD provides a safer isolation of a fault.

I assume it's buried in a British Standard for RCD's of which I have no access to.

 

[holmslaw]

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[Spark123]

DP RCDs are also required on caravan sites under the 17th ed.

 

[holmslaw]

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[Spark123]

Not a fire risk area, a special location non the less.

 

[holmslaw]

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[Taylortwocities]

I thought anything outside the house that is electrical ie cable should be protected by a rccd , what if the garage supply cable whic is a 6.00mm twin & earth protected by plastic conduit was damaged and it was'nt protected by a rcc back at the house.

There's another basic problem, Jag. Is this conduit visible and above ground, or has it been buried??

 

[securespark]

Previous post deleted.

Apologies for my misleading advice.

I did not have a copy of the regs with me and I misinterpreted some scribbled notes I had made on my 17th update course.

 

[jaguar1]

The plastic conduit is on the surface of a wall , thanks