grounding pneumatic piping 2

[oranjeep]

Has anyone had to ground a pneumatic piping system
with shrink wrapped rubber couplings? I have to figure out an
way to bypass all the rubber joints (hundreds of them) with jumpers.
We also wish not to disturb the integrity of the piping system, so drilling and tapping the pipes will have to be done from one side only, if the client wants to go that route.
Is there an aproved fastener that will anchor a jumper cable, be electrically conductive, and hermetically seal the hole it is in?
I am suggesting using water pipe clamps-one on each side of the shrink wrapped rubber coupling-and a length of jumper cable (probably tinned copper braid) to jump it. The pipes are of a varying diameter-2"-4&quot and 16 guage thickness. They are coated with zinc galzinization.

 

[busbar]

For the specified size, you may be able to use something like T&B 3900-series or Burndy GG-series clamps.

http://elec-cat.tnb.com/tnbcat/tnbc...p_subgroup_hier_id=&p_category_hier_id=CKY171

http://12.30.8.43/fci/datasheet.asp?PN=GG2125b&FAM=GG&P=124363

http://12.30.8.43/fci/datasheet.asp?PN=GS4T50&FAM=GroundStraps

 

[BJC]

Why not run a bare solid galvanized wire along the pipe and attach it with a stainless ty wrap?

http://elec-cat.tnb.com/tnbcat/tnbcat/TYR_home_page_dsp.build_catalog_home_page

I am assuming the grounding is to bleed off the static charge generated by the moving air. It would not have to meet the same requirements as fault return grounding.

 

[busbar]

BJC, that's a good point. For electrostatic currents, plastic cable times may even do the job.

 

[jbartos]

Suggestion: Visit

http://www.infras.gov.ab.ca/content/doctype486/Production/15917b.doc

for paragraph 3.5 which includes a principle that can be used for the pneumatic conduit
Essentially, the pneumatic conduit is grounded via the equipment grounding method. It is grounded by bonding pneumatic conduits rather than running a separate conductor.

 

[oranjeep]

The GS4T50
BURNDY adjustable ground straps look like an idea to explore. How do they work? Do you wrap them around the pipe and torque them down? Then, how do you atach the cable? I imagine adjustable strape will do the trick for static electricity. I also imagine they will be far less expensive than 40 dollar apiece clamps.

 

[busbar]

If it's not any sort of critical application, get some $1 aerosol or worm-drive clamps from a hardware store.