Extending cables

[ThrownRazor25]

Been asked to move supply for a pizza oven in a fast food outlet,it's currently wired in 16 mm but could I use 10 mm to extend via Lucy blocks or stick with 16? I have plenty of 10 but no 16 but want to do the job right.

oven is 50 a an cable will be in 50 x50 PVC trunking

Many thanks in advance

 

[ian.settle1]

More info required as you haven't said how much it is being moved etc

 

[ThrownRazor25]

It's only being moved about 5 metres the cable which I there is short though.total run is about 10 metres,6 metres of which is currently in 16mm

 

[SPARTYKUS]

I'd go and get some 16.0mm & do it right. Just my opinion.

 

[Marvo]

Changing, especially reducing, cable CSA in mid run would be very bad practice. The next sparky may replace the MCB in the CU according to the cable size he sees and this would leave the 10mm section open to overload.

 

[RyanCheetham]

You can buy 16mm by the meter at the wholesalers, the cost of which you pass onto the client. However if you say it is only 6m to the DB why not renew the whole run rather than putting a join in?

 

[Octopus]

I reacon that 10m of 16T&E will work out cheaper that an extra 5 m plus the parts and time to do the joint.

 

[dan86]

I'd personally just replace the lot. not like it's miles long

 

[Marvo]

I assume someone would have mentioned it by now if there was but I'm surprised there's no reg forbidding the reducing of CSA mid cable run.

 

[SPARTYKUS]

I assume someone would have mentioned it by now if there was but I'm surprised there's no reg forbidding the reducing of CSA mid cable run.

Its just against every fibre of ones being!

 

[Octopus]

I assume someone would have mentioned it by now if there was but I'm surprised there's no reg forbidding the reducing of CSA mid cable run.

Malcolm would know but where has he gone?

 

[Des 56]

433.2.1

 

[kingeri]

I reduced a lighting circuit from 2.5mm to 1.5mm the other day. 2.5mm was in there to due to voltage drop, and didn't fancy trying to terminate 2.5 into switches and pendants. Not quite the same thing, I know. Hope I don't get shot!

 

[SPARTYKUS]

Any last requests kingeri.....

 

[Engineer54]

Just wondering how any electrician would even think of reducing the supplying cables CSA on a high current bit of equipment. Or come to that, putting a joint in the system when we're only talking about 6 metres to the DB!!

Has anyone even bothered to assess and/or calculate the correct size of cable for this Pizza oven??