Can you join Main Protective bonding conductor

[Pete999]

Plastic

Then test the exposed copper to see if it constitutes extraneous metalwork.

 

[The Ghost]

not following the wiring regs will mean you are not following one of the above statutory

Close but not quite the exact position. We are required to adhere to statute in any form failure to do so may lead to prosecution. If you do not follow regs you are not therefore breaking the law in the form of statutes. To put it another way regs are not statute or law. You can completely ignore the regulations and you would not be breaking any law at all. As stated if you do follow regs and something goes wrong it can be used as a defense. This is stated in EAWR.
For instance doing an EICR. Limitations must be agreed with the person ordering the work. Regs require all circuit to be tested with a particular set of tests. The client may say well you can't switch off sockets in my machine shop or I will lose £20k per day. Ok a limitation is then agreed. The machine shop burns down. Are you guilty of a crime?

 

[telectrix]

10mm, do you take this 6mm as your lawful wedded wife?

I do.

6mm do you take this 10mm as your lawful wedded husband?

I do.

With this crimp, I do thee wed.

I now pronounce you Mr. & Mrs. Bond .

 

[gazdkw82]

Close but not quite the exact position. We are required to adhere to statute in any form failure to do so may lead to prosecution. If you do not follow regs you are not therefore breaking the law in the form of statutes. To put it another way regs are not statute or law. You can completely ignore the regulations and you would not be breaking any law at all. As stated if you do follow regs and something goes wrong it can be used as a defense. This is stated in EAWR.
For instance doing an EICR. Limitations must be agreed with the person ordering the work. Regs require all circuit to be tested with a particular set of tests. The client may say well you can't switch off sockets in my machine shop or I will lose £20k per day. Ok a limitation is then agreed. The machine shop burns down. Are you guilty of a crime?

If it's just a conversation then I think that won't stand in the dock if it came to that. If you omit from the regs because of customers orders then make them Sign an agreement which makes then agree and understand what is being omitted. Would that be the best way to approach?

 

[The Ghost]

Would that be the best way to approach?

Don't forget that all limitations are entered on to the EICR and there is also a box as to who agreed to this, which must be the person ordering the work. Therefore you have the paper trail. I personally would write an email detailing limitations discussed and get written confirmation that was agreed. It is quite commonplace to find that certain circuits cannot be powered down. Where there are critical services or servers etc. Or just business that will not accept down time. However on could try to arrange (at extra cost) out of hours testing which I have often done.

 

[Michaelwgroves]

Looks like the joint is not the issue, but as I am upgrading the system I need to install 10mm.
Just need to bite the bullet on this.

 

[Pete999]

Looks like the joint is not the issue, but as I am upgrading the system I need to install 10mm.
Just need to bite the bullet on this.

Are you going to test the possibility of the internal pipework being extraneous?

 

[Michaelwgroves]

Are you going to test the possibility of the internal pipework being extraneous?

For the sake of good workmanship yes, but also as it was for my assessment

 

[Pete999]

For the sake of good workmanship yes, but also as it was for my assessment

So you wouldn't bother if you were already registered then?

 

[Michaelwgroves]

So you wouldn't bother if you were already registered then?

As I said, "For the sake of good workmanship yes"

 

[Michaelwgroves]

One thing you won't be aware of, all the pipes are cross bonded on the boiler, so I'm not expecting an issue, but gonna test anyway.

 

[Simonslimline]

As has already been mentioned in post 18, how did you carry out the adiabatic for a Main protective bonding conductor?

Is the TN-C-S, PME or PNB?

 

[Michaelwgroves]

As has already been mentioned in post 18, how did you carry out the adiabatic for a Main protective bonding conductor?

Is the TN-C-S, PME or PNB?

Take a look at this thread;

6mm Earth and Main protective bonding conductors - https://www.electriciansforums.co.uk/threads/6mm-earth-and-main-protective-bonding-conductors.123287/

 

[Richard Burns]

As has already been mentioned in post 18, how did you carry out the adiabatic for a Main protective bonding conductor?

Is the TN-C-S, PME or PNB?

The main protective bonding conductor if non TNCS must be >= half the size required for the earthing conductor (and >=6mm²); therefore application of the adiabatic equation to determine the size required for the earthing conductor will define the minimum size for the bonding conductor.
Because a 250A BS1361 fuse at 400V will give a csa of just less than 6mm² in the worst case and any smaller fuse will give a lower csa, as the I²t will be lower, the calculation becomes redundant for most DNO supplies with Uo of 230V and the default 6mm² can be applied without calculation.
PME systems are only dependent on selection from 54.8.

 

[Simonslimline]

The main protective bonding conductor if non TNCS must be >= half the size required for the earthing conductor (and >=6mm²); therefore application of the adiabatic equation to determine the size required for the earthing conductor will define the minimum size for the bonding conductor.
Because a 250A BS1361 fuse at 400V will give a csa of just less than 6mm² in the worst case and any smaller fuse will give a lower csa, as the I²t will be lower, the calculation becomes redundant for most DNO supplies with Uo of 230V and the default 6mm² can be applied without calculation.
PME systems are only dependent on selection from 54.8.

out of interest, what if the supply is Protective neutral bond?

Still TN-C-S but not PME!

Thanks.