[time-nuts] How to love your Power Poles.
edgecomberts at gmail.com
Thu Jun 22 17:14:25 EDT 2017
My AU$0.02 worth, evidently trading less than the Greenback right now...
Coloured PP shells.
Yup, I'd already seen this issue, I'm using PP's on traction driver packs
(totally unrelated to this list, but run with me, they're DC), the input -
"hot" - would be a *red* shell, and the output - "cold" - would be *black*.
Your main strapping *from* the traction batteries or alternator would have
a matching red/ "hot" plug. Motor supply straps would have the black plug.
I was indenturing to be a telephone linesman many years ago. I'm only just
a little rusty on my 10 pair. Don't ask anything over a 20 pair please, I'd
need to be quite inebriated for that... just my luck, I'm putting an Aria
130 PABX with two 25 pair Champ sockets back together soon...
I actually ran into PP's for the first time in amateur radio work, we had
repurposed commercial band gear into the UHF CB band here in Oz for public
safety during a remote off grid orienteering event. That was all
*deliberately* KISS - myself, the linie, my adopted brother, the electrical
engineer, and our adopted uncle, another electrical engineer. Between the
three of us, we'd see about as much FUBAR you could cram into that amount
of combined working life. I found them damned reliable compared to a
cigarette lighter plug, and I was yet to encounter Merit plugs, commonly
used in dual way fridges here in Oz when I lived off grid for a while.
I can think of an occasion where you'd *absolutely need* a non-gendered
connection, but its so almost uniquely specific to my work I'm loathe to
mention it here. Its also a single pole.
A coloured PP isn't a proof against your lithium chemistry storage turning
into a fireball, yes, you're correct. But it might give pause to the
operator, and prompt them to *double check* before throwing the knife
switch, which was my intention.
Now, does anyone know much about RCDs and dual pole DC circuit breakers
that'd kill the supply in case such a situation arose...? Over to you!
On Fri, Jun 23, 2017 at 4:09 AM, Chris Albertson <albertson.chris at gmail.com>
> No, there are more problems. Being non-gendered that apply
> connections mistakes like connecting to power sources together.
> Could you imagine how bad it would be if all power connectors were
> not-gendered? then you could connect two wall AC mains outlet
> together. Kind of a problem if there were out of phase (US 120VAC
> wiring is like that) Bad enough that it allows tow DC power supplies
> to be connected.
> What is is good for is it you are in a hurry. non-genet connections
> were invented for firemen so after laying dow 300 feet of hose that
> NEVER find the have it backwards and have to flip a 300 foot hose end
> for end. Ive done this a few times with outdoor AC extension cords.
> There is an advantage to gendered connectors. Typically the source
> are female and you can't plug two outhouse together by mistake. If
> you need N-way connections yo make and test the power harness before
> That said I do have some power pole cables. They work good for 12VDC
> lead acid battery type stuff. But NEVER use then for exotic battery
> chemistries. Fires are not good. and it WILL happen if you use PP
> on Lithium type batteries, an accident waiting to happen.
> On Thu, Jun 22, 2017 at 7:11 AM, James Robbins <jsrobbins at earthlink.net>
> > I’ve used Power Poles for some years. I have a proper crimper intended
> for PP. Color coding is very useful.
> > I think the complaints about them are due to two things: (1) improper
> crimping of the contacts and (2) heavy gauge wire.
> > The PP15/30/45 use the same plastic housing while changing the size of
> the contact. A wire gauge suitable for 30 to 45 amps is quite large
> physically and puts a great deal of mechanical strain on the plastic
> connectors. So, when such a gauge of wire moves (or doesn’t move), it
> tends to disconnect the plastic housings. If the connections are from one
> set of wires to another, a two prong plastic jumper plug can successfully
> hold the four connectors together through the mating holes in the pair
> during movement.
> > The problem is that when one set of connectors is mounted in a chassis,
> it is often not really possible to use a two prong plug (or Ty-Wrap) to
> physically hold them together. Move the chassis and if the wire doesn’t
> want to follow, you get disconnected.
> > Two solder lugs mounted to the chassis and a few small Ty-Wraps will fix
> most of this “heavy wire” issue.
> > Jim Robbins
> > N1JR
> > PS: Make up a pair of PP with an LED to test your future PP builds.
> > _______________________________________________
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> Chris Albertson
> Redondo Beach, California
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