outdoor circuit extending from indoor circuit

[elrobbo]

starspark

thought you would know that united utilities adhere to different regulations than BS7671. also you say your an approved electrician, don't you mean approved electrical engineer. as you said flaunt it.

i have just qualified as an electrical engineer and am hoping to broaden my knowledge on this forum.

depending on where the consumer unit is depends on what damage would be caused, this might be minimal. once again on site electrician to advise.

 

[elrobbo]

spark123

do you therefore agree with taking a supply from the consumer unit to the SWA and turning into a radial for purposes of isolation as i seem to have been slated for this advice as over engineering a solution.

 

[RMS]

no idea about UU

Well you should really in your postion. The answer is no.

Have a look at this, http://www.legislation.gov.uk/uksi/2002/2665/contents/made

 

[Spark123]

For a 13A max supply it could be taken from a DP switched fused spur unit from the RFC. For over 13A a new circuit from the CU is needed.

 

[RMS]

So extend the Ring Final circuit around the garden to include sockets and lights in the shed? How do you go about isolation in the shed?

Isolation for what? Surly the op can terminate the ring final circuit in a socket outlet.

To me it is a very poor design, having the ring final circuit running outside hence a fault is going to trip the RCD including the sockets inside, clearing the fault is another headache.

Not too dissimilar to a dual RCD consumer unit that complies with BS7671.

I agree the design could be improved by other methods. The op has stated they are not prepared to go back to the consumer unit.

 

[westie101]

It does pay to know of which you speak, United Utilities has not been involved with electrical distribution for well over a year, so any electrical installation they posses will be covered by BS7671!

 

[RMS]

spark123

do you therefore agree with taking a supply from the consumer unit to the SWA and turning into a radial for purposes of isolation as i seem to have been slated for this advice as over engineering a solution.

The op has made it clear that this is not an option. Sometimes as an engineer you have to work with and make the best of what you have

 

[starspark]

Yes but the op may not want the destruction etc like i said.
I agree with DP spur though.

RMS i know now!!
Your link was an interesting read.

elrobbo my jib card says approved electrician not engineer but if you wanna call me that carry on!!

 

[elrobbo]

i would personally try to protect the cable with highest possible protective device for the cable and fuse down in the shed. running a supply to the existing SWA and a return would mean that you would have a separate ring for the shed thus enabling future modifications.

 

[starspark]

Yes elrobbo but again ill state it again as RMS said this is not an option!!

Westie are you saying bs7671 is or isnt in there scope??

 

[westie101]

As regards United Utilities as a water company with electrical installations, yes everything of theirs would come under BS7671

They are no longer a DNO having sold it all the network to Electricity Northwest and transferring the staff

 

[starspark]

ahhh!! Well i did mean DNO in general so i still should have known better!!
shame on me!!

 

[Spark123]

So extend the Ring Final circuit around the garden to include sockets and lights in the shed? How do you go about isolation in the shed?

Isolation for what? Surly the op can terminate the ring final circuit in a socket outlet.

I thought you had to have a double pole isolator in an external building which is not adjoined to a property?

To me it is a very poor design, having the ring final circuit running outside hence a fault is going to trip the RCD including the sockets inside, clearing the fault is another headache.

Not too dissimilar to a dual RCD consumer unit that complies with BS7671.

I agree the design could be improved by other methods. The op has stated they are not prepared to go back to the consumer unit.

That is their shout, still IMO a very very poor design which I wouldn't admit to designing myself, nor would I want my name dragged through the mud when it goes pear shaped.

 

[RMS]

As regards United Utilities as a water company with electrical installations, yes everything of theirs would come under BS7671

They are no longer a DNO having sold it all the network to Electricity Northwest and transferring the staff

Yes we know, they were obviously referring to a Distribution Network Operator.

 

[elrobbo]

starspark

i am aware but i seem to be going off on a tangent. i suppose i am just stating what i would do given my property and not what the op is asking.

westie101

surely the distributors do not adhere to BS7671 or am i mistaken? probably.