Earth bond clamp for oil pipe

[dnjr]

Dear All
Got a board change to do where there is an incoming oil pipe.
Plastic tank with PVC covered copper pipe most of the way. Comes inside and its just copper coming up through the floor. Did an IR test and got 0.00 so it needs bonding ( as I understand it its got to be under 0.02 to not need bonding)
Problem is the pipe is only about 8 or 9 mm dia. and i cant find a small enough clamp.
Someone suggested either a P clip or strap banding but they dont seem very professional. what are people using please
cheers
dnjr

 

[westward10]

You can get Ezybond clamps but they only go down to 15mm from what I have seen. There are rumours these are not in compliance with BS951 but I believe the manufacturer has resolved this.

 

[dnjr]

You can get Ezybond clamps but they only go down to 15mm from what I have seen. There are rumours these are not in compliance with BS951 but I believe the manufacturer has resolved this.

Hi Westward. Yep seen them but as you say dont go small enough. I cant be the only person needing to bond oil pipes. there must be something out there....

 

[telectrix]

bare copper p-clip is the answer. 4mm brass nut & bolt with a lug on the bonding cable.

 

[Wilko]

Hi - only thing I found was an earth rod clamp. It's 9mm and I recall drilling it out to 10mm and being very careful not to overtighten it.

9mm ( 3/8" ) Cast Earth Clamp - https://www.tlc-direct.co.uk/Products/TLEC.html

 

[telectrix]

you can't over tighten them things. the bolt will shear before it crushes spaghetti.

 

[davesparks]

Did an IR test and got 0.00 so it needs bonding ( as I understand it its got to be under 0.02 to not need bonding)

You might want to check your maths there!

 

[dnjr]

You might want to check your maths there!

teach me to read first
IR was 0.00M ( as I understand it , if its below 0.02M then it needs bonding if its above 0.02M then no need. Think I meant to put Over 0,02 but typed under...
Am I right this time davesparks ?

 

[telectrix]

over 0.22Meg means it's not extraneous and does not need bonding. if under that, a continuity test is required from pipe to MET. a reading below 1.0 ohms suggests that it is bonded through other services, e.g.water and may not need additional bonding.

 

[dnjr]

over 0.22Meg means it's not extraneous and does not need bonding. if under that, a continuity test is required from pipe to MET. a reading below 1.0 ohms suggests that it is bonded through other services, e.g.water and may not need additional bonding.

Hi Teletrix
I thought it was 0.022M ( 22000 ohms)
over that dont bond under that and it needs bonding
I did a continuity test and got 0.06 ohms I had it in mind it had to be below 0.05 to be acceptable (GN3) could be wrong, its been a long day
I cant find either a oil pipe bond or a water pipe bond so getting worried and going belt and braces

 

[telectrix]

that 0.05 figure has to be the most misquoted figure of all time. it's the max. resistance betweem a bonding cable and the pipe to which it is bonded. I.E the resistance across the bonding clamp from cable to pipe.

 

[Risteard]

that 0.05 figure has to be the most misquoted figure of all time. it's the max. resistance betweem a bonding cable and the pipe to which it is bonded. I.E the resistance across the bonding clamp from cable to pipe.

Precisely. It's just to demonstrate that the clamp is adequately connected to the pipe!

 

[davesparks]

teach me to read first
IR was 0.00M ( as I understand it , if its below 0.02M then it needs bonding if its above 0.02M then no need. Think I meant to put Over 0,02 but typed under...
Am I right this time davesparks ?

Also including some clue as to the units is quite important, I didn't quite register that you used an IR tester and was thinking in ohms.

My opinion on this subject is not exactly in line with the popular opinion on the forum, I'm inclined to interpret the regulations as requiring incoming services that be bonded at point of entry.

 

[sparkdog]

I usually manage to fit a standard earth clamp to an oil pipe.

 

[dnjr]

I usually manage to fit a standard earth clamp to an oil pipe.

I've tried. Just too big for this one.