[TowerTalk] UL listed protector for ladder line

[Jim Lux]

UL listed coax protectors are none-to-common either (well, for cable TV, they're pretty common).

It depends on why Martin needs this.  Typically the requirement (e.g. from the county building dept) is "nationally recognized test lab" (of which UL is one) or "signed off by a licensed Professional Engineer". 

if they're being VERY persnickety, using two listed coax devices might not work, because "use as specified by mfr" is almost always part of the rules.  So you're back to finding a PE to design and sign off on an assembly.

Also is it "overvoltage protection" or "grounding" that is the concern - for satellite TV and Cable TV, it's "grounding of the shield" that's the concern.
 
What frequencies? 
What Z?
What specifically is sought by the AHJ here? Overvoltage and/or transient? 

On Fri, 13 Jun 2025 13:29:21 +0000, john simmons <jasimmons at pinewooddata.com> wrote:

Would it fly to use two UL-listed coaxial lightning protectors? I doubt you'll find what you are looking for.

-John
On 6/13/2025 5:54 AM, Martin A Flynn wrote:

Have a situation where a UL listed protector is required on a ladder line feeder.

I’m striking out in my search

Any suggestions?

73 Martin

W2RWJ
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