[DARARepeater] PowerPole connectors

[Jack Gerbs]

Agree!  The whole system must be considered.  Typically you strive for no more than a 2% line loss, for mobile and Ham Radio applications 5% is typically used, not that I agree with allowing that big a loss.  Its all about standards and then the tradeoffs, fine print and footnotes!

From: dararepeater-bounces at mailman.qth.net <dararepeater-bounces at mailman.qth.net> On Behalf Of Rezza Rahmani
Sent: Monday, January 28, 2019 12:22 AM
To: Joe <gojoe55 at gmail.com>
Cc: DARARepeater at mailman.qth.net
Subject: Re: [DARARepeater] PowerPole connectors

Its probably a combination of marketing folks wanting to give the best possible number and the application engineers writing for an audience that reads the footnotes.

If you look at the extended tables there is a little more color to the numbers... 55A is only a single 10awg to 10awg connection and only of you can accept a 60° rise in the connector and even then all Anderson is saying is that their connector will remain safe as defined by UL 1977(they won’t promise that the rest of your system or wiring will be safe or comply to any other applicable rules) Realistically you will be following a stricter standard for your product (i.e. if you look at their table on pg 28 going by CSA/TÜV standards Anderson only rates that series in that config to 40A (which more closely aligns to the NEC tables))

For a real application you would consider the whole system, de-rate as appropriate and then probably apply a safety factor.

Realistically (for hobby applications) you probably don’t want to use that series for much more than 30A if the duty cycle is low or 20A if it’s higher.


Sent from my Falcon Heavy rocket

On Jan 27, 2019, at 10:43 PM, Joe <gojoe55 at gmail.com<mailto:gojoe55 at gmail.com>> wrote:
For 10 A.W.G., an edition of the ARRL Handbook lists 55 amps as “Cont.-duty current single wire in open air”.
It lists 33 amps as “Cont.-duty current wires or cables in conduits or bundles”.

Joe - WA8OGS

On Jan 27, 2019, at 10:32 PM, Jim Bacher - WB8VSU <wb8vsu at arrl.net<mailto:wb8vsu at arrl.net>> wrote:

Steve, as UL recognized the connectors at that current level they should be able to handle it. As they referenced a UL file number it should be a valid number, that's assuming their marketing department didn't have a typo.

It might be the 55 amps is not a continuous current, or maybe a break/make momentary current rating. Or some technique to quickly get to a larger gauge wire.

You can go to UL.com<http://UL.com> and do a search for their UL file number. UL will likely have details of any special conditions for that current level in their file.
Jim Bacher, WB8VSU
wb8vsu at arrl.net<mailto:wb8vsu at arrl.net>
https://trc.guru

On Sun, Jan 27, 2019 at 9:06 PM, Steve Reed
<kb8stb at gmail.com<mailto:kb8stb at gmail.com>> wrote:
In a recent discussion with a new ham about PowerPole connectors the question of how they claim up to "55 amps per pole."

The other ham in the discussion is a retired electrician and recalls that you need wire larger than 10 AWG to carry 55 amps.

page 20 of the manufacturers catalog...
https://www.andersonpower.com/content/dam/app/ecommerce/product-pdfs/CAT-PPMP.pdf

states....
     "PP15-45 series are the smallest Powerpole® housings. They can be used for wire-to-wire or wireto-board applications. Wire sizes from #20 AWG (0.75 mm²) to #10 (6 mm²) offer power capabilities up to 55 amps per pole."

several different "Ampacity charts" like this one...

https://www.usawire-cable.com/pdf/nec-ampacities.pdf

state that 10 AWG gauge wire is only good for (at 90 degree temp rise) 40 amps of current.  And the ** at the bottom of the PDF talks about limiting 10 gauge to 30 except in extreme conditions.

Can anybody explain Andersons claim of "55 amps per pole"

Thanks

Steve
KB8STB

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