Lots of regs questions

[ericmark]

Extension of an existing lighting circuit -
Can one run two sets of 4 x 50w downlights off a radial extension from the lighting circuit on 1mm T&E.

Assuming all regulations on supply size and protections of course you can.

for the switch the wiring will be less than 50mm below the surface but within the safe zone, does this need earthed conduit to protect it?

That is one method but there are other methods as well BS 8436 cable for example.

The cable will be attached to the joists above 100 mm of insulation below 150mm more, is this acceptable?

As long as normal 5/6 amp protections is used yes.

Extra sockets
Please can you confirm that i am ok to run 3 Double sockets on a spur with a 13a FCU protecting them.
Actually thinking about it i could split the ring at the back of a double socket, replacing it with a single then extend the ring around this new room, are there suitable single gang accessories for this purpose?

There are double single backing boxes and if you download BS 7671:2008, Corrigendum (July 2008) from http://www.theiet.org/publishing/wiring-regulations/updates/ you will see what is allowed at end of document.

Also I believe all of this work does not need Part P as it is an extension of an existing circuit which is permitted.

Except for special locations and kitchens see http://www.planningportal.gov.uk/england/professionals/en/4000000001253.html to down load and read yourself it is in plain English.

I am also planning on putting in another spur on the ring in another location that originates from the kitchen but terminates in another room, would this be notifiable?

Most likely not but read yourself.

Also remember even if you don’t need to notify the LABC you should still test all circuits if you fill in the forms found in the Part P document or BS 7671:2008 forms from http://www.theiet.org/publishing/wiring-regulations/forms/index.cfm

Eric

 

[ban-all-sheds]

Eric - what have you got against using [ quote] [ /quote] like everybody else to make it easier to distinguish your answers from the questions?

Also I believe all of this work does not need Part P as it is an extension of an existing circuit which is permitted.

Part P applies to all work on fixed electrical cables or fixed electrical equipment located on the consumer’s side of the electricity supply meter that are intended to operate at low or extra-low voltage and are:
(a) in or attached to a dwelling;
(b) in the common parts of a building serving one or more dwellings, but excluding power supplies to lifts;
(c) in a building that receives its electricity from a source located within or shared with a dwelling; or
(d) in a garden or in or on land associated with a building where the electricity is from a source located within or shared with a dwelling.

 

[ericmark]

As I said read the document and make up your own mind up. I find contradictions through out the document for example page 1 it states “BS 7671 certificates for all electrical work” yet on page 10 section 1.13 it states BS 7671 does not insist on a Minor Works Certificate being issued etc etc but BS 7671:2008 states “132.13 Documentation for the electrical installation every electrical installation shall be provided with appropriate documentation, including that required by Regulation 514.9. Part 6 and where applicable Part 7.” which seems to contradict what the Part P document says.
As to the quotes I write in Word then cut and paste hence no html quotes I use dragon naturally writing as my mauled right hand means it is hard to type so I speak my message.
Eric

 

[ban-all-sheds]

As I said read the document and make up your own mind up.

I have read The Building Regulations- they are quite clear regarding the scope of Part P.

I find contradictions through out the document

There are no contradictions in The Building Regulations.

for example page 1 it states “BS 7671 certificates for all electrical work”

Now you're talking about Approved Document P, not The Building Regulations, and the reason that BS 7671 is mentioned on Page 1 is that Page 1 is the contents page, and Approved Document P concentrates on the advisable route to compliance with The Building Regulations of working to BS 7671.

yet on page 10 section 1.13 it states BS 7671 does not insist on a Minor Works Certificate being issued etc etc but BS 7671:2008 states “132.13 Documentation for the electrical installation every electrical installation shall be provided with appropriate documentation, including that required by Regulation 514.9. Part 6 and where applicable Part 7.” which seems to contradict what the Part P document says.

It says:

1.13 BS 7671 does not insist on a Minor Works
Certificate being issued for the replacement of
equipment such as accessories or luminaires, but
advises that this should be done where appropriate
inspection and testing has been carried out,
irrespective of the extent of the work undertaken.

BS 7671 says, wo MEIWCs (with my emphasis):

This Certificate MAY also be used for the replacement of equipment such as accessories or luminares...

But in any event it's probably not a good idea to get to worried about contradictions between a document which describes an optional way to comply with The Building Regulations and a British Standard which has nothing to do with The Building Regulations and which is now at a different version to the version around which the Approved Document was constructed anyway.

As to the quotes I write in Word then cut and paste hence no html quotes I use dragon naturally writing as my mauled right hand means it is hard to type so I speak my message.
Eric

I'm sorry to hear that, but if you can cut and paste into the reply window here then surely you can highlight text and click on the Quote button?

 

[ericmark]

That would interest my farmer friends. Any greenhouse it seems come under the Part P regulations I had thought when there was no dwelling on the site Part P did not apply? In fact that's what it says further down the same document.
Yet another let the courts decide entry?
Eric

 

[ban-all-sheds]

That would interest my farmer friends. Any greenhouse it seems come under the Part P regulations I had thought when there was no dwelling on the site Part P did not apply?

It doesn't - where have you read that it does? Both the Building Regulations and the guidance doc say that it doesn't....