Main Protective Bonding required?

[SLIPSHOD & SLAPDASH]

When the plastic push on pipe fittings first came out, better makes came with 2, 951 clamps and a bit of 6mm. We are now told not to bond across plastic joins.

 

[binky]

where did you find that Slips?

 

[SLIPSHOD & SLAPDASH]

Not to bond across plastic joints ?

Cant remember now but it was in one of the better publications, not read on line.

It may have been a Nic thing

 

[Sidewinder]

There is a minimum length of plastic pipework & fittings that makes the "downstream" side no longer an extraneous conductive part.

It's down to the science and the expected continuity of the water etc, bridging the metallic to metallic pipework, can I remember what it is or where it is, can I courgette!

It is "out there" though!

 

[Blue Duck]

mr cock burns  book of made up earthing techniques?

:lol:

 

[Sidewinder]

mr cock burns  book of made up earthing techniques?

:lol:

No Duck, there is some REAL science behind the system of calculations so that it DOES comply with the requirements of BS7671 etc.

 

[Manator]

Here is an interesting article written by Paul Cook Plastic pipe

 

[Tony S]

There is a minimum length of plastic pipework & fittings that makes the "downstream" side no longer an extraneous conductive part.

It's down to the science and the expected continuity of the water etc, bridging the metallic to metallic pipework, can I remember what it is or where it is, can I courgette!

It is "out there" though!

Something we made use of with induction furnaces, the 660V coils and cables were water cooled so a section of rubber tubing was used as a break in the earth path.

Water = plumbers = me scratching my head why the damn thing is tripping on earth fault. For separation 2 x 0.6m of rubber tubing was specified, not the 2 x 0.15m they used.

It lead to all sorts of problems, electrolysis blocking the water paths with deposits resulting in low water flow and raised coil temperature, both are shut down conditions.

 

[Rob_the_rich]

@Tony S

Plumbers are only one step up the ladder from Builders......

only one person on a ladder at a time please.

 

[Rob_the_rich]

I get it, how do you know if the ladder is level? They drool out of both sides of their mouths

 

[kerching]

I feel sorry for the Ambulance chasing Lawyers and the Estate Agents...fighting amongst each other  to see who is on the lowest rung!....both of them covered in the drool,from above

 

[Tony S]

I feel sorry for the Ambulance chasing Lawyers and the Estate Agents...fighting amongst each other  to see who is on the lowest rung!....both of them covered in the drool,from above