Earth Bonding Help Please

[NozSpark]

I'm sorry, but it's obvious that you don't understand what you're doing or why you're doing it.

Otherwise you'd have done it correctly and connected it up, earthing and bonding is an important safety feature!

 

[angellonewolf]

the only reason i am asking is if you look at the the earth wire coming from the main fuse board a the top it is a very small green wire this looks to me not the right size and i am leaning to connect the bonding wire to the bottem box as this has a larger earth cable to it ? and hence a lower resistance to earth?

and i and think i am right in saying you bond all services to earth so as if a fault happens the item can not become live ?

correct me if i am wrong please

thanks angel

 

[Wilpickard]

I'm sorry, but it's obvious that you don't understand what you're doing or why you're doing it.

Otherwise you'd have done it correctly and connected it up, earthing and bonding is an important safety feature!

"It's only the earth, not important" how many times have I heard that before?

 

[angellonewolf]

"It's only the earth, not important" how many times have I heard that before?

sorry did any one say this is not important ?

 

[angellonewolf]

what details do you need so i can sort this would better pics help close ups ?

 

[Wilpickard]

sorry did any one say this is not important ?

No one on here but I've heard people and customers say it before, your thread just reminded me of it,

Earthing and bonding are very important, important it's done correctly.

Important that the person installing it understands it fully.

Which I'm my opinion you do*'*

 

[SPECIAL LOCATION]

what details do you need so i can sort this would better pics help close ups ?

For a start off...

as has ALREADY been asked..

WHAT IS YOUR EARTHING ARRANGMENTS...

TNS

TNCS

TT ?

What is your external earth loop impedance reading?

At the moment it looks like; either a messy/bodged up TNCS or TT converted to TNCS...

BUT...

we are ALL GUESSING..

because despite asking..

you haven't told us!!!!!!!!!

The suppliers earthing arrangement needs to be known to establish if or what sized bonding conductors are suitable!!!

 

[angellonewolf]

hope you can see more pics had a bit of a clean up

 

[angellonewolf]

more pics if helps

 

[angellonewolf]

to reply to the earthing arrangements i do not know as the coarse i done was a very long time ago

the supply cable before the main meb fuse is one fat cable with a red core and the armor is the earth and neutral witch can been seen from above photo

can i say thanks to

Manator

for saying how to post pics i hope this helps you guys out

ps i was going to shorten the tails to the bottem board but the weather was bad and i would have to do this live i do have 1000 volt kewtec screw drivers and cutters but when its raining did not think this was a ideal conditions

 

[Manator]

First of all we need to go back to basics. It is vital to understand the earthing arrangements presented, the safety of the installation depends on

a, the earthing is suitable

b, the earthing is present

This is done by visual inspection and testing, the pictures you have posted show a very odd but not unusual supply. I would only guess that the install is indeed a TT, simply because I can not see and earthing supplied by the distributor. The earth looks like it is directly connected to the neutral.

This can easily be verified by suitable testing, we need to know the Ze of the supply, this is the earth loop external to the property.

 

[angellonewolf]

yes there is no neutral cable black (now blue cable)the neutral is the earth in one

thanks

Manator

 

[ParkySparky]

to reply to the earthing arrangements i do not know as the coarse i done was a very long time ago

the supply cable before the main meb fuse is one fat cable with a red core and the armor is the earth and neutral witch can been seen from above photo

can i say thanks to

Manator

for saying how to post pics i hope this helps you guys out

ps i was going to shorten the tails to the bottem board but the weather was bad and i would have to do this live i do have 1000 volt kewtec screw drivers and cutters but when its raining did not think this was a ideal conditions

You were going to do what? Have you reserved your grave?

This should not happen!!! You obviously have no idea what your doing!

 

[ProDave]

Just back from a weekend away so missed most of the discussion,

firstly DO NOT DO ANY ALTERATIONS LIVE. I make no apology for shouting, it's important.

What you appear to have there is a VERY old supply head. It probably would have been a TT supply at some point but the fact it's now a concentric incomer suggests it could be tncs but would be subject to confirmation by the DNO.

But in any event, a concentric incomer should not be terminated like that, so you have just cause to call the DNO in to fit the correct supply head, and at the same time confirm the earthing arrangements.

What you need done BEFORE that by someone COMPETENT is to tidy up all your consumer unit side meter tails. Take the opportunity to upgrade them all to 25mm up to the henly blocks and dress them neatly.

Then when the DNO comes, make SURE someone competent is there to ensure as well as fitting the new supply head and confirming the earthing type, they also upgrade their tails to 25mm and dress them nicely.

In order to safely isolate to make alterations to your CU tails, requires someone competent.

Now rewinding to the start of the thread. You say something about the earth bonding cable you have used will not fit the terminals of the larger of your two CU's? What size cable did you use, as I've not seen a CU, even older ones like that, that will not accommodate a 16mm earth cable.

 

[Sharpend]

this is getting not only silly but seriously dangerous, I recommend you stop before you do serious damage

 

[angellonewolf]

ok thanks fro the help guys i did stop and think on shorting the wires and stoped there its only cosmetic yes the wires would have looked better shorter and neater but the ways out way the means so will leave them alone is the tidying better ? it was only a few wires(to an out side connector used for a pond supply) that are unused and a low volt tranforemer i have removed

as can been seen the new bonding wire now looped on the left of the box need to be connected to earth to contemplate the bonding the question i wanted to ask from the start is would it be better to connect this to the top board or the lower board if you look at the wire coming from the top board you can see a small green earth cable poss 4mm to the earth and the newer board connected by meb 13 years ago poss 6mm earth cable i would assume its better to connect to the lower box as the Resistance with the bigger cable is going to be less

again thanks angel for all help

can i ask how much would/should you pay to have the system tested and part p cert given if no problems found ?

 

[ProDave]

It's your house so your choice.

BUT if ever you come to sell it, even the most untrained surveyor will be bound to flag up some nonsense about the electrics, as it simply looks a bloody mess.

Get someone competent as I already suggested to sort out the routing and size of the CU tails, and then get the DNO to sort out their supply head, and you will have a safe and neat looking installation.

I would say the earthing to both CU's needs upgrading anyway. Neither are up to current standards.

 

[Andy™]

ps i was going to shorten the tails to the bottem board but the weather was bad and i would have to do this live i do have 1000 volt kewtec screw drivers and cutters but when its raining did not think this was a ideal conditions

go for it. then later, your widow can employ someone who's competent to finish off the job.

 

[angellonewolf]

if the earthing to both is not up to standard what should meb chage to sort this out ?

 

[angellonewolf]

thanks

Andy™

sence came to mind be for doing deed