filling in certs etc

[sijaysee]

if u have a circuit which is for example a ring in 2.5 and then there is a spur off it in 4mm , do u explain that in the cert when it asks for size of conductors etc?

 

[Taylortwocities]

what cert are you doing?
What work are you doing?

If its an extension to an existing cct then you'll only be doing a Minor works cert so CSA doesnt go there.
BTW - why are you chnaging the CSA. If the ring is in2.5mm then additions should salso be 2.5mm

 

[GaryMo]

The Minor Works Certificates I complete (EasyCert Professional by Tysoft) ask for CSA of the lives and cpc conductors.
The model MWC's in the rear of BS7671:2008 don't for some reason.

You should record the size of the smallest conductor in the circuit if there's a change in CSA.

 

[sijaysee]

thanks garymo.
the 4mm spur is already there.
the mwc that i complete do ask for csa

 

[Mike2007]

Obviously someone who can't do simple cable calcs and put in a cable of a bigger size to cover his back! Not thinking or the resistance in the 2.5 ring cable back to CU

 

[GaryMo]

Maybe the 4mm spur is routed through unfavourable conditions?
Remember, each cable installed for a 32A ring final must be capable of carrying 20A.