While putting up the first part of my tower I stripped the threads on
one EHS cable clamp (clip) and broke another one. This was with a ratchet
wrench with a 6" long handle. I'm no strongman and figure the absolute maximum
torque I could have applied was 40 foot pounds (and it was probably more like
25-30 foot pounds). These 1/4CCM clamps were ordered with the Rohn part number
from a major supplier. Side by side with the same part from a second major
supplier they are hard to tell apart. The two failures were out of 38 clamps
installed so far. I alternate between the two nuts to pull them out evenly
from the saddle.
1. What torque value is "right" for this situation? I'll also be using a
large number of 3/16CCM clamps later and would like to know the torque
limit for these too.
2. If #1 has no answer, can I use a visual indication, like some amount of
crimping of the EHS to tell me I have the thing properly tightened?
3. Is it likely I have defective clamps or is a 5% failure a fact of life
with these components?
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