mix and match

[tom1]

i think the answer would be to cut back and drill like you say, or put in a separate cu for new circuits and circuits not in conduit

 

[tom1]

had a thought the other day, is there any thing to stop me installing the new cu over the top of the old cu, the new is bigger and its in a cupboard so would not look unsightly.

is that a strange idea?

 

[tom1]

back on this again, some one i sometimes work with had a look at the cu and said to cut conduit back and use bs951 clamps on to earth it. i said that i did not think you could do that, he thinks its ok. can any one point me in the direction of a reg that i can show him

 

[Andy™]

nothing wrong with a 951 on steel conduit. sometimes its the only way to earth it. just make sure there are no sharp edges where cables exit conduit

had to do this a few times in flats to re-wire lighting circuit through existing conduit

 

[tom1]

[quote name='Andy

 

[steptoe]

[quote name='Andy

 

[Andy™]

what were the reasons behind prohibiting it?

 

[steptoe]

[quote name='Andy

 

[Sidewinder]

I'm with Steps & Andy on this!

Not like I'm sitting on the fence or anything!

IF the conduit was 1/2" BSP black pipe (approx. same OD) carrying air or gas that needed bonding in an industrial/commercial environment, would anyone have a problem using a 951 clamp to achieve this?

I doubt it.

The tube dia. is approximately the same so there are no issues over this. Either would need the tube cleaning back to bare and possibly protecting from further corrosion etc.

The earthing/bonding conductor connected to which ever would need to be appropriately selected regardless.

IF you can

 

[batty]

Well looking through regs can't see anything to say you cannot use bs951 clamps on conduit and cannot see a reason to not use them but if you don't want to use them use some of the piranha thingies.

 

[tom1]

thanks everyone for helping with this, the cu was a real tight fit so it got moved and i was able to un bolt the conduit and getting a tag for the threads then blot it on