Hi Doug
Bit of TLA burnout here, [using 2 in combination is too much], what is
DLO/RHH wire? You say similar to welding wire but what I Googled was tinned
copper braid wire with a high temp insulation. I work 1 AWG to be 7.35mm
[0.29"].
So if you are looking at tinned copper braid, the UL guy is being a bit
picky. From a strict soldering point of view this is nothing that special -
Possibly the polymer insulation and stuff might affect the process limits.
Tinned copper should not be a special challenge! If you have to use a
separate flux, use the least active that works. Type R would be most likely
be OK. Take care not to get wicking of flux solder up the braid [as usual].
If it is solid welding rod then the UL advise is good. You will probably
need an active [water wash] flux and wash off [depending on the precise
composition of the rod.] This will pre-tin the surface making it solderable
by puny electronic grade assembly fluxes.
Regards
Mike
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Doug@lcm
Sent: Friday, October 22, 2010 11:03 PM
To: [log in to unmask]
Subject: [TN] Any recommendations for solder alloy to tin DLO/RHH flexible
wire?"
The company I work for wants to use DLO/RHH flexible wire ( very similar to
welding wire) in the electric control panels we build. The UL inspector has
informed me that in order to do so we have to tin the ends of the wire (AWG
1/0 and larger) he said that some of the panel shops he covers use a solder
pot to tin the wire. I contacted Kester and inquired about the best solder
and method to use. The engineer that replied suggested I contact IPC forum
and inquire. So here is my question. What is the recommended solder and if
needed flux to use to tin the ends of this flexible wire?
Douglas Minniear
Lewis and Clark Machine
P.O. Box 615
501 Lottery Ln.
Hines, Oregon 97738
541-589-1330 cell
541-573-3044 fax
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