What is the best way to bond grounding conductors to Rohn 25,45,or 55? I am ok with cadweld for the rods etc but is cadweld the answer for bonding to the tower section? Pete K4OM pstark@suddenlink.ne
Polyphaser has stainless steel hose clamps that have a section that fits underneath the ground strap/wire/braid and protects from bimetallic corrosion. (not the exact term for it, I know, but I can't
Then why not use what most people use for lightning grounds: stranded or solid copper wire/cable. There's already plenty of inductance in the whole tower, so adding a fraction of a microhenry by goin
I am ok with cadweld for the rods etc but is cadweld the answer for bonding to the tower section? No. Do not use Cadweld on the tower - it'll just burn a hole in the thin wall of the leg. Use a compr
I use a section of stainless steel (good quality). Wrap it around the leg, then use a stainless steel hose clamp to hold your copper wire in place against the stainless steel "plate". Works well - no
Why? Prime Directive: Always follow the Manufacturer's instructions. The manufacturer recommends using strap and clamps. Polyphaser and ICE both, that is. Polyphaser is out to sell things, sure. Howe
Hmm... what mfr are we talking about here? I can see using the bolts that the mfr of a tower recommends to hold sections together. But here, we're talking about a system design recommendation. But, t
One good reason is that copper is anodic to zinc and steel. You will get preferential corrosion of the zinc and eventually of the steel - eventually corroding the steel until it is unable to support
And this is why you don't attach copper anything, strap or wire, directly to a galvanized (zinc) surface. Clamp some stainless sheet to the leg then clamp your strap or wire to to the stainless. -- R
That comes from the fact that when buying copper, strap gives you more surface area and lower inductance than round wire for a given amount of copper cost. And for those that would advocate copper pi
Polyphaser was recommending using copper strap long before they were selling it. They only started selling it as a convenience to customers that didn't know where to get it when buying their other pr
Or why "listed" clamps for this sort of application have the appropriate metals. Also, this sort of thing is above ground, and the whole corrosion thing is different (like, maybe, covered in paint or
Yes, and so is stainless steel, and it can be even more anodic depending on the exact composition. So how do you justify putting stainless steel next to the zinc? And while I'm at it, I may as well t
For lightning protection, there's several things driving the selection of the conductor. Interestingly, the absolute lowest RF impedance is not one of them. 1) You need to be big enough not to melt.