main bonding

[ample current]

Is it ok to clamp 10mm earth cable to the gas pipe then to the water pipe and then to the Installation earthing terminal or do the have to be sepatete cables, the cable runs are about 3m.

Many thanks in advance
Mark

 

[malcolmsanford]

Well section 9 is concerning PME supplies and section 26 does indeed appertain to non connection of supplies.

There is a note in section 9(4) concerning and mentioning

Special consideration should be given to the earthing and protection arrangements for certain installations where reliance on the connection of the consumer’s protective conductor with the distributor’s combined neutral and protective conductor could result in more significant risks. For example, installations where it may prove difficult to attach and maintain all the necessary equipotential bonding connections (e.g. farms or building sites),installations at certain wet environments (e.g. swimming pools and petrol filling stations) and certain installations outside the equipotential zone of buildings (e.g. certain types of street furniture). Further advice may be sought from the Health and Safety Executive or the Institution of Electrical Engineers.

Taken from the ESQCR-2002

The above extract and highlighted section maybe what the engineer(??) was referring to, especially as if the engineer, and I use the broadest possible term here, does not have a clue what he is talking about.

 

[ample current]

Thank you for all your replys, i have connected it using one cable not cut, just stripped at the clamp where it passes the water pipe on its way to the cu.
Cheers
Mark

 

[gdr7671]

Well section 9 is concerning PME supplies and section 26 does indeed appertain to non connection of supplies.

There is a note in section 9(4) concerning and mentioning

Special consideration should be given to the earthing and protection arrangements for certain installations where reliance on the connection of the consumer’s protective conductor with the distributor’s combined neutral and protective conductor could result in more significant risks. For example, installations where it may prove difficult to attach and maintain all the necessary equipotential bonding connections (e.g. farms or building sites),installations at certain wet environments (e.g. swimming pools and petrol filling stations) and certain installations outside the equipotential zone of buildings (e.g. certain types of street furniture). Further advice may be sought from the Health and Safety Executive or the Institution of Electrical Engineers.

Taken from the ESQCR-2002

The above extract and highlighted section maybe what the engineer(??) was referring to, especially as if the engineer, and I use the broadest possible term here, does not have a clue what he is talking about.

I agree as i said before. But when you need the supply connecting it is anything for a quiet life. Why argue with a meter fixer even if i am a registered engineer

 

[i=p/u]

ok what about this one....

theres another sink being put into utlity room in house, does this need to be main protective bonded??

ive priced for the socket outlets and ligting in that room... but not bonding.. suppose test it

 

[lardy]

On the 2391 fault board (practical taken last week) one of the faults was the main bonding conductor not continuous. The task was to find “12 non compliances”, not bad practice.
If it was a non-compliance or not, it was what they were looking for!

 

[ringer]

ok what about this one....

theres another sink being put into utlity room in house, does this need to be main protective bonded??

ive priced for the socket outlets and ligting in that room... but not bonding.. suppose test it

Main bonding is to gas and water supplies, not to sinks. You may or may not need to supplementary bond a sink. You did of course check the main bonding existed and was up to scratch, didn't you?

 

[malcolmsanford]

ok what about this one....

theres another sink being put into utlity room in house, does this need to be main protective bonded??

ive priced for the socket outlets and ligting in that room... but not bonding.. suppose test it

Is there a metallic waste pipe?

Is the water supply taken from a different source than from the main water supply?

Is there any extraneous conductive parts on the sink?

Does the utility room also contain a bath or shower?

 

[Spazz]

I see that some have mentioned lugs and eyes on the earthing bond, when I was working as a mechanic (yes with 12v and 24v) you could get a strip of metal with 2 eyes - 1 each end.
You would bend this around the cable and solder it so the 2 eyes met and put a bolt through to connect the earth (neutral on a car) to say the body or the engine. Would this be accepted with 240v as the clip I feel is big enough to handle it plus its only an earth.
The clip is 10mm wide by 50mm long, so it will bend around upto 12mm cable. If I can find a link I will post it.

 

[Guest112]

my mate failed his am2 because he cut the cable seems a bit harsh considering its not a reg but only good practice like

 

[BillyTheSparks]

I'm not sure if I'm making this up, but i believe that you can get 'Y' shaped crimps.

If so would it be acceptable to take one 10mm to where the gas and water pipes are (if they're next to each other) and then crimp in the 'Y' crimp and take two seperarte 10mm leads to each BS951?

I have never done this, just curiosity. :49:

 

[Geordie Spark]

I'm not sure if I'm making this up, but i believe that you can get 'Y' shaped crimps.

If so would it be acceptable to take one 10mm to where the gas and water pipes are (if they're next to each other) and then crimp in the 'Y' crimp and take two seperarte 10mm leads to each BS951?

I have never done this, just curiosity. :49:

There's a thread about it here:

Can you crimp more than 2 cables? - DIYbanter

Post #6 briefly mentions "y" shaped crimps.

 

[BillyTheSparks]

There's a thread about it here:

Can you crimp more than 2 cables? - DIYbanter

Post #6 briefly mentions "y" shaped crimps.

I have seen that before, but the only methods the posts go into are Wagos and through crimps; with two wires shoved into one end and a doubled wired shoved in the other.
I'm sure I've seen them on a wab site for earthing, but cant remember the name and cant find it at the moment.

 

[Engineer54]

whilst on the subject of main bonding, whats your gents opinion on bonding to production pipework, that enters and leaves a building?
I work in pumping stations, and treatement works, and we have pipework that enters and leaves a building. Should it be bonded at entry and exit, as close as possible to the entry/exit? should it be bonded at one end, and assume that it is then at the same potential as the MET?
Can the SWA to the pumps (cable over 50mm2) be used as main bonding, as the pumps and bases are steel, and electrically continious?

Id be interested in your opinion.

John

The answer to this question is ''YES!!'' In every Hospital building as well as many other types of buildings, i've been involved with, where metallic pipework of any kind, enters and leaves the building. Where that pipework has a value that requires bonding under normal situations, you would bond at entry and exit points!! Example ..medical gas pipes, steam pipes, HVAC chilled water and return pipes, etc, etc!!

And as the conversation is covering linking services with single bonding cables, ...for instance Medical gases will generally all enter the building (and probably exit the building) as a group and would therefore be linked via a single bonding conductor, similarly this would also generally apply to Chilled water pipework etc, too. Can you imagine taking a separate conductor to each pipe, hell you'd need a 6''X 6'' trunking system just to hold all these bonding conductors, let alone a very extended MET or earthing bar...lol!!!

 

[BillyTheSparks]

Earth Crimp Connectors – Earth Bonding, Earth Crimp, Earth Clamp » Products

Anyone seen these before?

It doesn't look like you could get 2x 10mm in them but useful in their own way i guess

 

[i=p/u]

1..plastic waste pipe
2..il assume is copper piping from main water supply at first sink
3. the sink itself would be extraneous
4. no bath or shower

and doesnt require suplementry bonding if has main bonding.. which i havent looked yet. i put on my quote confirm price after site visit...

Is there a metallic waste pipe?

Is the water supply taken from a different source than from the main water supply?

Is there any extraneous conductive parts on the sink?

Does the utility room also contain a bath or shower?