Chasing Out

[smithjim0001]

hi all

i need to chase out for a new fused spur which i am picking up from the ring coming off a twin S.S.O but my only and i mean only option is to chase up to a corner and then around onto the other wall.

not chased into a corner is it allowed? clearly its still horizontal cant find any where in the regs that say its not allowed. No access to floor of ceiling

Any advice

thanks

jim

 

[Riggy]

Remember that within 150mm of the corner is a safe zone anyway, so if you need to change height do it there.

 

[sparkytim]

If the cable will be Horizontal from the supply socket to the corner then horizontal to the new point then both sections are in an acceptable zone, so no problem

 

[pickleye]

And if it were outside safe zone it would have to be RCD protected, but it should be anyway because its a socket

Me thinks

 

[kme]

NO!

Using an RCD doesn`t give carte blanche to run a cable outside safe zones.

Sorry, but "you thinks" wrongly mate

KME

 

[pickleye]

I stand corrected, thank you.

How do safe zones work between floors? eg, my db is upstairs above a doorway, so, if i were rewiring - which i'm not, how would I go about this? Pick a corner and run down it? Upstairs and downstairs internal walls don't all line up so I couldn't pick the most direct obvious route.

We don't do much domestic, if we do it ends up in trunking, so i'm genuinly curious about this.

 

[kme]

Safe zones do not transcend solid walls / ceilings. Effectively, they`re only relevant to a particular room; th exception being the obverse of a single-skin wall can utilise the safe zones from the other side....I don`t particulary like to utilise this option, but it IS allowed.

 

[pickleye]

So... would I move the CU from above the door and run cables vertically down from the CU into the floor then diverted to where i want them to drop into sockets etc.

I suppose that makes more sense.

I'll give my mentor another clip on monday for bad teaching. headbang

Thanks KME

 

[safedepth]

Does the safe zone extend between two adjacent walls? I rather thought not. An outlet on one wall will not indicate a safe zone on the next wall or the next etc.

Am i wrong again?

 

[steptoe]

no, but if you chase across one wall from the accessory, then round the corner and along the next wall to an accessory you have created a safe zone on each wall.

 

[safedepth]

Thought so. Thanks.

 

[gselectrical]

http://img41.imageshack.us/img41/9802/safezones.jpg' alt='safezones.jpg'>

 

[Badger]

what about a cooker cable chased across a kitchen wall under coving from one end to another, of kitchen wall then down to cooker point? would that be allowed?

 

[m4tty]

If the coving was the the top of the wall where it joins the ceiling

 

[Badger]

the coving is at the top of the wall, ok if its a safe zone and no points are in line how would any one know the cable was there in the future once its plastered,

 

[safedepth]

the coving is at the top of the wall, ok if its a safe zone and no points are in line how would any one know the cable was there in the future once its plastered,

My red

 

[Badger]

well i would never do that personally i dont think its right myself, take floor boards up above and run cable through joists drop down directly above the circuit accessory job done

 

[steptoe]

well i would never do that personally i dont think its right myself, take floor boards up above and run cable through joists drop down directly above the circuit accessory job done

laminate floor or tiled bathroom.

I know, and I agree with you, but it is an allowed zone.........

I dont make the rules,

sometimes I dont even follow them. :|

 

[GBS Property]

Noting the Green book (Electrician's Guide to the Building Regs.) @ 2.3.3 where a cable is concealed in a wall or partition at a depth of less than 50mm from any surface it must be enclosed in earthed metal conduit (trunking or ducting) or installed either horizontally within 150mm of the top of the wall or partition or vertically within 150mm of the angle fromed by the two walls, or run horizontally or vertically to an accessory or consumer unit. Somewhat contradictory - looking at Fig. 2.3.3 suggests if it is not horizantal or vertical then RCD protection is required - BUT the NOTE: states if it runs less that 50mm it requires RCD protection anyway. To me this means that you can run a diagonal track as long as it is RCD protected - but the Regs state that sockets should be RCD protected anyway! I hope I haven't confused myself with this! Nonsense!

 

[Graham Lister]

No the only way you can run out of zones with buried cable is if the cable is installed in earthed steel conduit or swa with earthed armour. RCDs do not allow t+e to be buried diagonally as Kme said earlier.