Earth continuity options through plastic isolator?

[SUNRAY]

After designing it a spark can legitimately allow another to work under his instruction.

This job can be done without any exposed metal with commercially manufactured parts and no difficulty making the connexions.
View attachment 271944

My apologies, for some reason this has not posted properly before:

Hopefully this time.

 

[Taylortwocities]

Indeed why, why, why???



If an electrician and his assistant install a new circuit, the assistant is not required to sign the documentation.
The assistant can quite legitimately be the customer as long as long as they follow the electricians instruction.



My interpretation of this (which I'm extremely happy to be corrected) is the different boxes are to be used when different trades complete the sections, I'm thinking more in terms of 'commercial' jobs where the architect does the initial building design, then different specialists (such as ME company) do thier design and the project goes out to tender, then various companies tender for parts of the project, then in this case an electrical company is appointed and parts are sub tendered and sub sub tendered to the lowliest person.
In my case Sunray builds and installs a control panel as a sub to 'Controls are us'.
'Controls are us' may or may not install the cable management for the controls system. They sub to 'ABC environment services' who install the air handling units and ducts.
'ABC environment services' sub to 'Laing ME' who get the contract for all of the mechanical/electrical services such as ventilation, heating, plumbing, drainage, etc
'Laing ME' sub to 'Laing' who get the whole contract for the project. and may very possibly put all of the inspecting out to 'We do Quality Control Ltd'

I don't think (which again I'll stress I' extremely happy to be corrected) the 3 boxes are intended for use when 'Eric the electrician' adds a shed supply but, under supervision (However loose that is), the house holder digs the trench and lays the cable in to save money.

Probably back in the day when NICEIC ruled the World. For a particular (larger) project they could have:
a designer (never went to site, but signed off his own design)
a cheap house basher who did the installation (who signed off his own shambles) maybe even "tested" it?)
Lastly an overall super dooper manager who signed off the last box.
Of course, he/she went to every site to carry out the necessary final inspection and testing. Not.

 

[bernardgreen]

He describes fitting a banjo by trapping it between the plastic enclosure and a locknut, no sorry I don't agree on the basis I've known too many become loose where the plastic spreads under the pressure,

Totally agree, plastic does de-form under pressure and the result is a loose banjo and un-reliable Earth connection,

 

[SUNRAY]

Totally agree, plastic does de-form under pressure and the result is a loose banjo and un-reliable Earth connection,

And this is one of the reasons I tend to avoid fitting a pointless brass glands into plastic enclosures.

 

[crappy]

Thanks for the info. I am following the conversation.
At this point I am both assistant and customer but he was away.

We've agreed on the install and I'm building to that. He was here today to see update on weekend progress. The idea that he did not laug at me is positive.

 

[SUNRAY]

Thanks for the info. I am following the conversation.
At this point I am both assistant and customer but he was away.

We've agreed on the install and I'm building to that. He was here today to see update on weekend progress. The idea that he did not laug at me is positive.

That's quite fair, I see no need to laugh at that. It's fair to say I've certainly seen some much shoddier pro jobs.
The only thing I might have suggested is moving to the left:

But I don't have any local knowledge or how that wooden post (fence/gate) affects it.

What was your final solution for eathing?

 

[crappy]

What's not clear in the pic is the fence is running in at an angle. Your suggestion puts it in a tighter spot where, in an emergency, someone with a missing left arm would not be able to easily isolate it . I jest but it is in a small space. That wall is not visible from anywhere in the garden so space is not important.

Re earthing - waiting on brass reducers and will retro fit. After taking the photo I left a large red ribbon to remind me.

 

[JohnW2]

My interpretation of this (which I'm extremely happy to be corrected) is the different boxes are to be used when different trades complete the sections, I'm thinking more in terms of 'commercial' jobs where the architect does the initial building design, then different specialists (such as ME company) do thier design and the project goes out to tender, then various companies tender for parts of the project, then in this case an electrical company is appointed and parts are sub tendered and sub sub tendered to the lowliest person.

I'm nor sure what an architect has got to do with design of an electrical installation.

I would have thought that the 'three signatures' provision simply means what it says, and therefore applies to any situation in which different people are responsible for the design, construction and inspection/testing of electrical work - of which the scenario you describe is just one of many possible ones.

Kind Regards, John

 

[winston1]

Oh lord, why can you never provide something that actually HELPS the topic. It's always a nit pick, never anything constructive...

It was informative. The OP was suggesting his spark was going to lie.

My point has been made before. BAS often made it.

 

[bernardgreen]

My point has been made before. BAS often made it.

Two wrongs seldom make a right.

 

[SUNRAY]

I'm nor sure what an architect has got to do with design of an electrical installation.

I would have thought that the 'three signatures' provision simply means what it says, and therefore applies to any situation in which different people are responsible for the design, construction and inspection/testing of electrical work - of which the scenario you describe is just one of many possible ones.

Kind Regards, John

Are you expecting a team of three people who regularly work together to individually sign the document when a job is done?
IE a rewire where they smack holes in the wall, fit back boxes, run cables and terminate/fit socket/switches, wire CU and test. All 3 working together for days, can you seriously expect them to identify every aspect?

 

[SUNRAY]

Are you expecting a team of three people who regularly work together to individually sign the document when a job is done?
IE a rewire where they smack holes in the wall, fit back boxes, run cables and terminate/fit socket/switches, wire CU and test. All 3 working together for days, can you seriously expect them to identify every aspect?

If they are expected to identify every little detail, who for example puts their name down for testing; the person holding the tester, the person poking the probes in the CU, the person writing down the results or the person putting on the R1+R2 short?

 

[Taylortwocities]

Guys. We are feeding the beast.
He will again be responsible for killing another thread by throwing a 10 word hand grenade into a (previously) well ordered topic.

 

[JohnW2]

Are you expecting a team of three people who regularly work together to individually sign the document when a job is done?

That is presumably the intention if three different people have been involved in the different aspects of the task and none of them is prepared to lie by claiming to have done all three parts of the work and being the sole signatory.

Kind Regards, John

 

[SUNRAY]

That is presumably the intention if three different people have been involved in the different aspects of the task and none of them is prepared to lie by claiming to have done all three parts of the work and being the sole signatory.

Kind Regards, John

In which case the paperwork for a domestic rewire would fill a ream of paper.

If I am 'labouring' on a job I wouldn't expect my name to appear on the cert, even if I wire a CU.